diff --git a/CHANGES.md b/CHANGES.md
index 34ffdbcfd6..26f3e2883b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@ Features ✨:
  - Conference with Jitsi support (#43)
 
 Improvements 🙌:
+ - Share button in rooms gives room ID link without via parameters (#1927)
  - Give user the possibility to prevent accidental call (#1869)
  - Display device information (name, id and key) in Cryptography setting screen (#1784)
  - Ensure users do not accidentally ignore other users (#1890)
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
index 95370c0188..cfddf73363 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
@@ -19,6 +19,7 @@ package org.matrix.android.sdk.api.session
 
 import androidx.annotation.MainThread
 import androidx.lifecycle.LiveData
+import okhttp3.OkHttpClient
 import org.matrix.android.sdk.api.auth.data.SessionParams
 import org.matrix.android.sdk.api.failure.GlobalError
 import org.matrix.android.sdk.api.pushrules.PushRuleService
@@ -35,6 +36,7 @@ import org.matrix.android.sdk.api.session.group.GroupService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilitiesService
 import org.matrix.android.sdk.api.session.identity.IdentityService
 import org.matrix.android.sdk.api.session.integrationmanager.IntegrationManagerService
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService
 import org.matrix.android.sdk.api.session.profile.ProfileService
 import org.matrix.android.sdk.api.session.pushers.PushersService
 import org.matrix.android.sdk.api.session.room.RoomDirectoryService
@@ -48,7 +50,6 @@ import org.matrix.android.sdk.api.session.terms.TermsService
 import org.matrix.android.sdk.api.session.typing.TypingUsersTracker
 import org.matrix.android.sdk.api.session.user.UserService
 import org.matrix.android.sdk.api.session.widgets.WidgetService
-import okhttp3.OkHttpClient
 
 /**
  * This interface defines interactions with a session.
@@ -195,6 +196,11 @@ interface Session :
      */
     fun fileService(): FileService
 
+    /**
+     * Returns the permalink service associated with the session
+     */
+    fun permalinkService(): PermalinkService
+
     /**
      * Add a listener to the session.
      * @param listener the listener to add.
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixLinkify.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixLinkify.kt
similarity index 97%
rename from matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixLinkify.kt
rename to matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixLinkify.kt
index b7e719d6db..8927f06c77 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixLinkify.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixLinkify.kt
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.permalinks
+package org.matrix.android.sdk.api.session.permalinks
 
 import android.text.Spannable
 
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixPermalinkSpan.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixPermalinkSpan.kt
similarity index 89%
rename from matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixPermalinkSpan.kt
rename to matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixPermalinkSpan.kt
index 15957d359a..a660930646 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/MatrixPermalinkSpan.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/MatrixPermalinkSpan.kt
@@ -15,11 +15,11 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.permalinks
+package org.matrix.android.sdk.api.session.permalinks
 
 import android.text.style.ClickableSpan
 import android.view.View
-import org.matrix.android.sdk.api.permalinks.MatrixPermalinkSpan.Callback
+import org.matrix.android.sdk.api.session.permalinks.MatrixPermalinkSpan.Callback
 
 /**
  * This MatrixPermalinkSpan is a clickable span which use a [Callback] to communicate back.
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkData.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkData.kt
similarity index 95%
rename from matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkData.kt
rename to matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkData.kt
index 3955c850c5..85632d6e83 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkData.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkData.kt
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.permalinks
+package org.matrix.android.sdk.api.session.permalinks
 
 import android.net.Uri
 
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkParser.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkParser.kt
similarity index 95%
rename from matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkParser.kt
rename to matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkParser.kt
index 4cf9331f0e..dd6847f1e3 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkParser.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkParser.kt
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.permalinks
+package org.matrix.android.sdk.api.session.permalinks
 
 import android.net.Uri
 import org.matrix.android.sdk.api.MatrixPatterns
@@ -37,7 +37,7 @@ object PermalinkParser {
      * Turns an uri to a [PermalinkData]
      */
     fun parse(uri: Uri): PermalinkData {
-        if (!uri.toString().startsWith(PermalinkFactory.MATRIX_TO_URL_BASE)) {
+        if (!uri.toString().startsWith(PermalinkService.MATRIX_TO_URL_BASE)) {
             return PermalinkData.FallbackLink(uri)
         }
 
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkFactory.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkService.kt
similarity index 57%
rename from matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkFactory.kt
rename to matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkService.kt
index 87b42f5ae8..804cde5b30 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/permalinks/PermalinkFactory.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/permalinks/PermalinkService.kt
@@ -15,55 +15,58 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.permalinks
+package org.matrix.android.sdk.api.session.permalinks
 
 import org.matrix.android.sdk.api.session.events.model.Event
 
 /**
  * Useful methods to create Matrix permalink (matrix.to links).
  */
-object PermalinkFactory {
+interface PermalinkService {
 
-    const val MATRIX_TO_URL_BASE = "https://matrix.to/#/"
+    companion object {
+        const val MATRIX_TO_URL_BASE = "https://matrix.to/#/"
+    }
 
     /**
      * Creates a permalink for an event.
      * Ex: "https://matrix.to/#/!nbzmcXAqpxBXjAdgoX:matrix.org/$1531497316352799BevdV:matrix.org"
      *
      * @param event the event
+     *
      * @return the permalink, or null in case of error
      */
-    fun createPermalink(event: Event): String? {
-        if (event.roomId.isNullOrEmpty() || event.eventId.isNullOrEmpty()) {
-            return null
-        }
-        return createPermalink(event.roomId, event.eventId)
-    }
+    fun createPermalink(event: Event): String?
 
     /**
-     * Creates a permalink for an id (can be a user Id, Room Id, etc.).
+     * Creates a permalink for an id (can be a user Id, etc.).
+     * For a roomId, consider using [createRoomPermalink]
      * Ex: "https://matrix.to/#/@benoit:matrix.org"
      *
      * @param id the id
      * @return the permalink, or null in case of error
      */
-    fun createPermalink(id: String): String? {
-        return if (id.isEmpty()) {
-            null
-        } else MATRIX_TO_URL_BASE + escape(id)
-    }
+    fun createPermalink(id: String): String?
 
     /**
-     * Creates a permalink for an event. If you have an event you can use [.createPermalink]
-     * Ex: "https://matrix.to/#/!nbzmcXAqpxBXjAdgoX:matrix.org/$1531497316352799BevdV:matrix.org"
+     * Creates a permalink for a roomId, including the via parameters
+     *
+     * @param roomId the room id
+     *
+     * @return the permalink, or null in case of error
+     */
+    fun createRoomPermalink(roomId: String): String?
+
+    /**
+     * Creates a permalink for an event. If you have an event you can use [createPermalink]
+     * Ex: "https://matrix.to/#/!nbzmcXAqpxBXjAdgoX:matrix.org/$1531497316352799BevdV:matrix.org?via=matrix.org"
      *
      * @param roomId  the id of the room
      * @param eventId the id of the event
+     *
      * @return the permalink
      */
-    fun createPermalink(roomId: String, eventId: String): String {
-        return MATRIX_TO_URL_BASE + escape(roomId) + "/" + escape(eventId)
-    }
+    fun createPermalink(roomId: String, eventId: String): String
 
     /**
      * Extract the linked id from the universal link
@@ -71,31 +74,5 @@ object PermalinkFactory {
      * @param url the universal link, Ex: "https://matrix.to/#/@benoit:matrix.org"
      * @return the id from the url, ex: "@benoit:matrix.org", or null if the url is not a permalink
      */
-    fun getLinkedId(url: String): String? {
-        val isSupported = url.startsWith(MATRIX_TO_URL_BASE)
-
-        return if (isSupported) {
-            url.substring(MATRIX_TO_URL_BASE.length)
-        } else null
-    }
-
-    /**
-     * Escape '/' in id, because it is used as a separator
-     *
-     * @param id the id to escape
-     * @return the escaped id
-     */
-    internal fun escape(id: String): String {
-        return id.replace("/", "%2F")
-    }
-
-    /**
-     * Unescape '/' in id
-     *
-     * @param id the id to escape
-     * @return the escaped id
-     */
-    internal fun unescape(id: String): String {
-        return id.replace("%2F", "/")
-    }
+    fun getLinkedId(url: String): String?
 }
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
index eb4b475b4d..f8ba625947 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
@@ -19,6 +19,13 @@ package org.matrix.android.sdk.internal.session
 
 import androidx.annotation.MainThread
 import dagger.Lazy
+import io.realm.RealmConfiguration
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import okhttp3.OkHttpClient
+import org.greenrobot.eventbus.EventBus
+import org.greenrobot.eventbus.Subscribe
+import org.greenrobot.eventbus.ThreadMode
 import org.matrix.android.sdk.api.MatrixCallback
 import org.matrix.android.sdk.api.auth.data.SessionParams
 import org.matrix.android.sdk.api.failure.GlobalError
@@ -37,6 +44,7 @@ import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.group.GroupService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilitiesService
 import org.matrix.android.sdk.api.session.integrationmanager.IntegrationManagerService
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService
 import org.matrix.android.sdk.api.session.profile.ProfileService
 import org.matrix.android.sdk.api.session.pushers.PushersService
 import org.matrix.android.sdk.api.session.room.RoomDirectoryService
@@ -63,13 +71,6 @@ import org.matrix.android.sdk.internal.session.sync.job.SyncWorker
 import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.util.MatrixCoroutineDispatchers
 import org.matrix.android.sdk.internal.util.createUIHandler
-import io.realm.RealmConfiguration
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import okhttp3.OkHttpClient
-import org.greenrobot.eventbus.EventBus
-import org.greenrobot.eventbus.Subscribe
-import org.greenrobot.eventbus.ThreadMode
 import timber.log.Timber
 import javax.inject.Inject
 import javax.inject.Provider
@@ -96,6 +97,7 @@ internal class DefaultSession @Inject constructor(
         private val termsService: Lazy<TermsService>,
         private val cryptoService: Lazy<DefaultCryptoService>,
         private val defaultFileService: Lazy<FileService>,
+        private val permalinkService: Lazy<PermalinkService>,
         private val secureStorageService: Lazy<SecureStorageService>,
         private val profileService: Lazy<ProfileService>,
         private val widgetService: Lazy<WidgetService>,
@@ -254,6 +256,8 @@ internal class DefaultSession @Inject constructor(
 
     override fun fileService(): FileService = defaultFileService.get()
 
+    override fun permalinkService(): PermalinkService = permalinkService.get()
+
     override fun widgetService(): WidgetService = widgetService.get()
 
     override fun integrationManagerService() = integrationManagerService
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionModule.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionModule.kt
index 1c1804ba5f..d404cecc51 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionModule.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionModule.kt
@@ -25,6 +25,9 @@ import dagger.Lazy
 import dagger.Module
 import dagger.Provides
 import dagger.multibindings.IntoSet
+import io.realm.RealmConfiguration
+import okhttp3.OkHttpClient
+import org.greenrobot.eventbus.EventBus
 import org.matrix.android.sdk.api.MatrixConfiguration
 import org.matrix.android.sdk.api.auth.data.Credentials
 import org.matrix.android.sdk.api.auth.data.HomeServerConnectionConfig
@@ -35,6 +38,7 @@ import org.matrix.android.sdk.api.session.InitialSyncProgressService
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.accountdata.AccountDataService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilitiesService
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService
 import org.matrix.android.sdk.api.session.securestorage.SecureStorageService
 import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageService
 import org.matrix.android.sdk.api.session.typing.TypingUsersTracker
@@ -72,6 +76,7 @@ import org.matrix.android.sdk.internal.session.download.DownloadProgressIntercep
 import org.matrix.android.sdk.internal.session.homeserver.DefaultHomeServerCapabilitiesService
 import org.matrix.android.sdk.internal.session.identity.DefaultIdentityService
 import org.matrix.android.sdk.internal.session.integrationmanager.IntegrationManager
+import org.matrix.android.sdk.internal.session.permalinks.DefaultPermalinkService
 import org.matrix.android.sdk.internal.session.room.EventRelationsAggregationProcessor
 import org.matrix.android.sdk.internal.session.room.create.RoomCreateEventProcessor
 import org.matrix.android.sdk.internal.session.room.prune.RedactionEventProcessor
@@ -81,9 +86,6 @@ import org.matrix.android.sdk.internal.session.typing.DefaultTypingUsersTracker
 import org.matrix.android.sdk.internal.session.user.accountdata.DefaultAccountDataService
 import org.matrix.android.sdk.internal.session.widgets.DefaultWidgetURLFormatter
 import org.matrix.android.sdk.internal.util.md5
-import io.realm.RealmConfiguration
-import okhttp3.OkHttpClient
-import org.greenrobot.eventbus.EventBus
 import retrofit2.Retrofit
 import java.io.File
 import javax.inject.Provider
@@ -356,6 +358,9 @@ internal abstract class SessionModule {
     @Binds
     abstract fun bindSharedSecretStorageService(service: DefaultSharedSecretStorageService): SharedSecretStorageService
 
+    @Binds
+    abstract fun bindPermalinkService(service: DefaultPermalinkService): PermalinkService
+
     @Binds
     abstract fun bindTypingUsersTracker(tracker: DefaultTypingUsersTracker): TypingUsersTracker
 }
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/DefaultPermalinkService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/DefaultPermalinkService.kt
new file mode 100644
index 0000000000..cef1fce05c
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/DefaultPermalinkService.kt
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.permalinks
+
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService.Companion.MATRIX_TO_URL_BASE
+import javax.inject.Inject
+
+internal class DefaultPermalinkService @Inject constructor(
+        private val permalinkFactory: PermalinkFactory
+) : PermalinkService {
+
+    override fun createPermalink(event: Event): String? {
+        return permalinkFactory.createPermalink(event)
+    }
+
+    override fun createPermalink(id: String): String? {
+        return permalinkFactory.createPermalink(id)
+    }
+
+    override fun createRoomPermalink(roomId: String): String? {
+        return permalinkFactory.createRoomPermalink(roomId)
+    }
+
+    override fun createPermalink(roomId: String, eventId: String): String {
+        return permalinkFactory.createPermalink(roomId, eventId)
+    }
+
+    override fun getLinkedId(url: String): String? {
+        return url
+                .takeIf { it.startsWith(MATRIX_TO_URL_BASE) }
+                ?.substring(MATRIX_TO_URL_BASE.length)
+                ?.substringBeforeLast("?")
+    }
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/PermalinkFactory.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/PermalinkFactory.kt
new file mode 100644
index 0000000000..3ec8fe8397
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/permalinks/PermalinkFactory.kt
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.permalinks
+
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.permalinks.PermalinkService.Companion.MATRIX_TO_URL_BASE
+import org.matrix.android.sdk.api.session.room.members.roomMemberQueryParams
+import org.matrix.android.sdk.api.session.room.model.Membership
+import org.matrix.android.sdk.internal.di.UserId
+import org.matrix.android.sdk.internal.session.room.RoomGetter
+import java.net.URLEncoder
+import javax.inject.Inject
+import javax.inject.Provider
+
+internal class PermalinkFactory @Inject constructor(
+        @UserId
+        private val userId: String,
+        // Use a provider to fix circular Dagger dependency
+        private val roomGetterProvider: Provider<RoomGetter>
+) {
+
+    fun createPermalink(event: Event): String? {
+        if (event.roomId.isNullOrEmpty() || event.eventId.isNullOrEmpty()) {
+            return null
+        }
+        return createPermalink(event.roomId, event.eventId)
+    }
+
+    fun createPermalink(id: String): String? {
+        return if (id.isEmpty()) {
+            null
+        } else MATRIX_TO_URL_BASE + escape(id)
+    }
+
+    fun createRoomPermalink(roomId: String): String? {
+        return if (roomId.isEmpty()) {
+            null
+        } else {
+            MATRIX_TO_URL_BASE + escape(roomId) + computeViaParams(userId, roomId)
+        }
+    }
+
+    fun createPermalink(roomId: String, eventId: String): String {
+        return MATRIX_TO_URL_BASE + escape(roomId) + "/" + escape(eventId) + computeViaParams(userId, roomId)
+    }
+
+    fun getLinkedId(url: String): String? {
+        val isSupported = url.startsWith(MATRIX_TO_URL_BASE)
+
+        return if (isSupported) {
+            url.substring(MATRIX_TO_URL_BASE.length)
+        } else null
+    }
+
+    /**
+     * Compute the via parameters.
+     * Take up to 3 homeserver domains, taking the most representative one regarding room members and including the
+     * current user one.
+     */
+    private fun computeViaParams(userId: String, roomId: String): String {
+        val userHomeserver = userId.substringAfter(":")
+        return getUserIdsOfJoinedMembers(roomId)
+                .map { it.substringAfter(":") }
+                .groupBy { it }
+                .mapValues { it.value.size }
+                .toMutableMap()
+                // Ensure the user homeserver will be included
+                .apply { this[userHomeserver] = Int.MAX_VALUE }
+                .let { map -> map.keys.sortedByDescending { map[it] } }
+                .take(3)
+                .joinToString(prefix = "?via=", separator = "&via=") { URLEncoder.encode(it, "utf-8") }
+    }
+
+    /**
+     * Escape '/' in id, because it is used as a separator
+     *
+     * @param id the id to escape
+     * @return the escaped id
+     */
+    private fun escape(id: String): String {
+        return id.replace("/", "%2F")
+    }
+
+    /**
+     * Unescape '/' in id
+     *
+     * @param id the id to escape
+     * @return the escaped id
+     */
+    private fun unescape(id: String): String {
+        return id.replace("%2F", "/")
+    }
+
+    /**
+     * Get a set of userIds of joined members of a room
+     */
+    private fun getUserIdsOfJoinedMembers(roomId: String): Set<String> {
+        return roomGetterProvider.get().getRoom(roomId)
+                ?.getRoomMembers(roomMemberQueryParams { memberships = listOf(Membership.JOIN) })
+                ?.map { it.userId }
+                .orEmpty()
+                .toSet()
+    }
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt
index 458d98bd52..2199193de0 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt
@@ -156,11 +156,15 @@ internal class DefaultRelationService @AssistedInject constructor(
                            originalTimelineEvent: TimelineEvent,
                            newBodyText: String,
                            compatibilityBodyText: String): Cancelable {
-        val event = eventFactory
-                .createReplaceTextOfReply(roomId,
-                        replyToEdit,
-                        originalTimelineEvent,
-                        newBodyText, true, MessageType.MSGTYPE_TEXT, compatibilityBodyText)
+        val event = eventFactory.createReplaceTextOfReply(
+                roomId,
+                replyToEdit,
+                originalTimelineEvent,
+                newBodyText,
+                true,
+                MessageType.MSGTYPE_TEXT,
+                compatibilityBodyText
+        )
                 .also { saveLocalEcho(it) }
         return if (cryptoService.isRoomEncrypted(roomId)) {
             val encryptWork = createEncryptEventWork(event, listOf("m.relates_to"))
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt
index fe6daad3b0..ac92e526a8 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt
@@ -22,7 +22,6 @@ import android.graphics.Bitmap
 import android.media.MediaMetadataRetriever
 import androidx.exifinterface.media.ExifInterface
 import org.matrix.android.sdk.R
-import org.matrix.android.sdk.api.permalinks.PermalinkFactory
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
 import org.matrix.android.sdk.api.session.events.model.Content
 import org.matrix.android.sdk.api.session.events.model.Event
@@ -59,8 +58,8 @@ import org.matrix.android.sdk.api.session.room.timeline.getLastMessageContent
 import org.matrix.android.sdk.api.session.room.timeline.isReply
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.content.ThumbnailExtractor
+import org.matrix.android.sdk.internal.session.permalinks.PermalinkFactory
 import org.matrix.android.sdk.internal.session.room.send.pills.TextPillsUtils
-import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.util.StringProvider
 import javax.inject.Inject
 
@@ -79,8 +78,8 @@ internal class LocalEchoEventFactory @Inject constructor(
         private val stringProvider: StringProvider,
         private val markdownParser: MarkdownParser,
         private val textPillsUtils: TextPillsUtils,
-        private val taskExecutor: TaskExecutor,
-        private val localEchoRepository: LocalEchoRepository
+        private val localEchoRepository: LocalEchoRepository,
+        private val permalinkFactory: PermalinkFactory
 ) {
     fun createTextEvent(roomId: String, msgType: String, text: CharSequence, autoMarkdown: Boolean): Event {
         if (msgType == MessageType.MSGTYPE_TEXT || msgType == MessageType.MSGTYPE_EMOTE) {
@@ -169,9 +168,8 @@ internal class LocalEchoEventFactory @Inject constructor(
                                  newBodyAutoMarkdown: Boolean,
                                  msgType: String,
                                  compatibilityText: String): Event {
-        val permalink = PermalinkFactory.createPermalink(roomId, originalEvent.root.eventId ?: "")
-        val userLink = originalEvent.root.senderId?.let { PermalinkFactory.createPermalink(it) }
-                ?: ""
+        val permalink = permalinkFactory.createPermalink(roomId, originalEvent.root.eventId ?: "")
+        val userLink = originalEvent.root.senderId?.let { permalinkFactory.createPermalink(it) } ?: ""
 
         val body = bodyForReply(originalEvent.getLastMessageContent(), originalEvent.isReply())
         val replyFormatted = REPLY_PATTERN.format(
@@ -207,7 +205,7 @@ internal class LocalEchoEventFactory @Inject constructor(
             ContentAttachmentData.Type.IMAGE -> createImageEvent(roomId, attachment)
             ContentAttachmentData.Type.VIDEO -> createVideoEvent(roomId, attachment)
             ContentAttachmentData.Type.AUDIO -> createAudioEvent(roomId, attachment)
-            ContentAttachmentData.Type.FILE  -> createFileEvent(roomId, attachment)
+            ContentAttachmentData.Type.FILE -> createFileEvent(roomId, attachment)
         }
     }
 
@@ -361,12 +359,15 @@ internal class LocalEchoEventFactory @Inject constructor(
         return System.currentTimeMillis()
     }
 
-    fun createReplyTextEvent(roomId: String, eventReplied: TimelineEvent, replyText: CharSequence, autoMarkdown: Boolean): Event? {
+    fun createReplyTextEvent(roomId: String,
+                             eventReplied: TimelineEvent,
+                             replyText: CharSequence,
+                             autoMarkdown: Boolean): Event? {
         // Fallbacks and event representation
         // TODO Add error/warning logs when any of this is null
-        val permalink = PermalinkFactory.createPermalink(eventReplied.root) ?: return null
+        val permalink = permalinkFactory.createPermalink(eventReplied.root) ?: return null
         val userId = eventReplied.root.senderId ?: return null
-        val userLink = PermalinkFactory.createPermalink(userId) ?: return null
+        val userLink = permalinkFactory.createPermalink(userId) ?: return null
 
         val body = bodyForReply(eventReplied.getLastMessageContent(), eventReplied.isReply())
         val replyFormatted = REPLY_PATTERN.format(
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
index e94feebdaa..040a5191e4 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
@@ -163,7 +163,6 @@ import kotlinx.android.synthetic.main.merge_overlay_waiting_view.*
 import org.billcarsonfr.jsonviewer.JSonViewerDialog
 import org.commonmark.parser.Parser
 import org.matrix.android.sdk.api.MatrixCallback
-import org.matrix.android.sdk.api.permalinks.PermalinkFactory
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
 import org.matrix.android.sdk.api.session.events.model.Event
@@ -1608,7 +1607,7 @@ class RoomDetailFragment @Inject constructor(
                 roomDetailViewModel.handle(RoomDetailAction.EnterReplyMode(action.eventId, composerLayout.text.toString()))
             }
             is EventSharedAction.CopyPermalink              -> {
-                val permalink = PermalinkFactory.createPermalink(roomDetailArgs.roomId, action.eventId)
+                val permalink = session.permalinkService().createPermalink(roomDetailArgs.roomId, action.eventId)
                 copyToClipboard(requireContext(), permalink, false)
                 showSnackWithMessage(getString(R.string.copied_to_clipboard), Snackbar.LENGTH_SHORT)
             }
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/RoomCreateItemFactory.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/RoomCreateItemFactory.kt
index 290eb2cff5..31adbdb8a6 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/RoomCreateItemFactory.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/RoomCreateItemFactory.kt
@@ -22,21 +22,22 @@ import im.vector.app.core.resources.StringProvider
 import im.vector.app.core.resources.UserPreferencesProvider
 import im.vector.app.features.home.room.detail.timeline.TimelineEventController
 import im.vector.app.features.home.room.detail.timeline.item.RoomCreateItem_
-import org.matrix.android.sdk.api.permalinks.PermalinkFactory
+import me.gujun.android.span.span
+import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.room.model.create.RoomCreateContent
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
-import me.gujun.android.span.span
 import javax.inject.Inject
 
 class RoomCreateItemFactory @Inject constructor(private val stringProvider: StringProvider,
                                                 private val userPreferencesProvider: UserPreferencesProvider,
+                                                private val session: Session,
                                                 private val noticeItemFactory: NoticeItemFactory) {
 
     fun create(event: TimelineEvent, callback: TimelineEventController.Callback?): VectorEpoxyModel<*>? {
         val createRoomContent = event.root.getClearContent().toModel<RoomCreateContent>() ?: return null
         val predecessorId = createRoomContent.predecessor?.roomId ?: return defaultRendering(event, callback)
-        val roomLink = PermalinkFactory.createPermalink(predecessorId) ?: return null
+        val roomLink = session.permalinkService().createRoomPermalink(predecessorId) ?: return null
         val text = span {
             +stringProvider.getString(R.string.room_tombstone_continuation_description)
             +"\n"
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/tools/EventRenderingTools.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/tools/EventRenderingTools.kt
index d09874c24a..4abaa4fae4 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/tools/EventRenderingTools.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/tools/EventRenderingTools.kt
@@ -26,12 +26,12 @@ import im.vector.app.core.utils.EvenBetterLinkMovementMethod
 import im.vector.app.core.utils.isValidUrl
 import im.vector.app.features.home.room.detail.timeline.TimelineEventController
 import im.vector.app.features.html.PillImageSpan
-import org.matrix.android.sdk.api.permalinks.MatrixLinkify
-import org.matrix.android.sdk.api.permalinks.MatrixPermalinkSpan
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import org.matrix.android.sdk.api.session.permalinks.MatrixLinkify
+import org.matrix.android.sdk.api.session.permalinks.MatrixPermalinkSpan
 
 fun CharSequence.findPillsAndProcess(scope: CoroutineScope, processBlock: (PillImageSpan) -> Unit) {
     scope.launch(Dispatchers.Main) {
diff --git a/vector/src/main/java/im/vector/app/features/html/MxLinkTagHandler.kt b/vector/src/main/java/im/vector/app/features/html/MxLinkTagHandler.kt
index 4eccfbb95c..368fdd27ff 100644
--- a/vector/src/main/java/im/vector/app/features/html/MxLinkTagHandler.kt
+++ b/vector/src/main/java/im/vector/app/features/html/MxLinkTagHandler.kt
@@ -21,15 +21,15 @@ import android.text.style.URLSpan
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.glide.GlideRequests
 import im.vector.app.features.home.AvatarRenderer
-import org.matrix.android.sdk.api.permalinks.PermalinkData
-import org.matrix.android.sdk.api.permalinks.PermalinkParser
-import org.matrix.android.sdk.api.session.room.model.RoomSummary
-import org.matrix.android.sdk.api.util.MatrixItem
 import io.noties.markwon.MarkwonVisitor
 import io.noties.markwon.SpannableBuilder
 import io.noties.markwon.html.HtmlTag
 import io.noties.markwon.html.MarkwonHtmlRenderer
 import io.noties.markwon.html.tag.LinkHandler
+import org.matrix.android.sdk.api.session.permalinks.PermalinkData
+import org.matrix.android.sdk.api.session.permalinks.PermalinkParser
+import org.matrix.android.sdk.api.session.room.model.RoomSummary
+import org.matrix.android.sdk.api.util.MatrixItem
 
 class MxLinkTagHandler(private val glideRequests: GlideRequests,
                        private val context: Context,
diff --git a/vector/src/main/java/im/vector/app/features/permalink/PermalinkHandler.kt b/vector/src/main/java/im/vector/app/features/permalink/PermalinkHandler.kt
index a23c67a8e9..87d114c01b 100644
--- a/vector/src/main/java/im/vector/app/features/permalink/PermalinkHandler.kt
+++ b/vector/src/main/java/im/vector/app/features/permalink/PermalinkHandler.kt
@@ -20,12 +20,12 @@ import android.content.Context
 import android.net.Uri
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.features.navigation.Navigator
-import org.matrix.android.sdk.api.permalinks.PermalinkData
-import org.matrix.android.sdk.api.permalinks.PermalinkParser
-import org.matrix.android.sdk.api.util.Optional
 import io.reactivex.Single
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
+import org.matrix.android.sdk.api.session.permalinks.PermalinkData
+import org.matrix.android.sdk.api.session.permalinks.PermalinkParser
+import org.matrix.android.sdk.api.util.Optional
 import org.matrix.android.sdk.rx.rx
 import javax.inject.Inject
 
diff --git a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
index 99efd17d0a..f2c85c96c7 100644
--- a/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/roommemberprofile/RoomMemberProfileViewModel.kt
@@ -27,8 +27,16 @@ import com.airbnb.mvrx.Uninitialized
 import com.airbnb.mvrx.ViewModelContext
 import com.squareup.inject.assisted.Assisted
 import com.squareup.inject.assisted.AssistedInject
+import im.vector.app.R
+import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.core.resources.StringProvider
+import im.vector.app.features.powerlevel.PowerLevelsObservableFactory
+import io.reactivex.Observable
+import io.reactivex.functions.BiFunction
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.matrix.android.sdk.api.MatrixCallback
-import org.matrix.android.sdk.api.permalinks.PermalinkFactory
 import org.matrix.android.sdk.api.query.QueryStringValue
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.events.model.EventType
@@ -47,15 +55,6 @@ import org.matrix.android.sdk.api.util.toOptional
 import org.matrix.android.sdk.internal.util.awaitCallback
 import org.matrix.android.sdk.rx.rx
 import org.matrix.android.sdk.rx.unwrap
-import im.vector.app.R
-import im.vector.app.core.platform.VectorViewModel
-import im.vector.app.core.resources.StringProvider
-import im.vector.app.features.powerlevel.PowerLevelsObservableFactory
-import io.reactivex.Observable
-import io.reactivex.functions.BiFunction
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 class RoomMemberProfileViewModel @AssistedInject constructor(@Assisted private val initialState: RoomMemberProfileViewState,
                                                              private val stringProvider: StringProvider,
@@ -337,7 +336,7 @@ class RoomMemberProfileViewModel @AssistedInject constructor(@Assisted private v
     }
 
     private fun handleShareRoomMemberProfile() {
-        PermalinkFactory.createPermalink(initialState.userId)?.let { permalink ->
+        session.permalinkService().createPermalink(initialState.userId)?.let { permalink ->
             _viewEvents.post(RoomMemberProfileViewEvents.ShareRoomMemberProfile(permalink))
         }
     }
diff --git a/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileViewModel.kt b/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileViewModel.kt
index 49d10d5129..2d409888e9 100644
--- a/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileViewModel.kt
@@ -22,8 +22,11 @@ import com.airbnb.mvrx.MvRxViewModelFactory
 import com.airbnb.mvrx.ViewModelContext
 import com.squareup.inject.assisted.Assisted
 import com.squareup.inject.assisted.AssistedInject
+import im.vector.app.R
+import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.core.resources.StringProvider
+import im.vector.app.features.powerlevel.PowerLevelsObservableFactory
 import org.matrix.android.sdk.api.MatrixCallback
-import org.matrix.android.sdk.api.permalinks.PermalinkFactory
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.events.model.EventType
 import org.matrix.android.sdk.api.session.room.members.roomMemberQueryParams
@@ -31,10 +34,6 @@ import org.matrix.android.sdk.api.session.room.model.Membership
 import org.matrix.android.sdk.api.session.room.powerlevels.PowerLevelsHelper
 import org.matrix.android.sdk.rx.rx
 import org.matrix.android.sdk.rx.unwrap
-import im.vector.app.R
-import im.vector.app.core.platform.VectorViewModel
-import im.vector.app.core.resources.StringProvider
-import im.vector.app.features.powerlevel.PowerLevelsObservableFactory
 import java.util.UUID
 
 class RoomProfileViewModel @AssistedInject constructor(@Assisted private val initialState: RoomProfileViewState,
@@ -118,9 +117,10 @@ class RoomProfileViewModel @AssistedInject constructor(@Assisted private val ini
     }
 
     private fun handleShareRoomProfile() {
-        PermalinkFactory.createPermalink(initialState.roomId)?.let { permalink ->
-            _viewEvents.post(RoomProfileViewEvents.ShareRoomProfile(permalink))
-        }
+        session.permalinkService().createRoomPermalink(initialState.roomId)
+                ?.let { permalink ->
+                    _viewEvents.post(RoomProfileViewEvents.ShareRoomProfile(permalink))
+                }
     }
 
     private fun handleChangeAvatar(action: RoomProfileAction.ChangeRoomAvatar) {