diff --git a/src/Lifecycle.ts b/src/Lifecycle.ts
index 78d8f9df4f..ac96d59b09 100644
--- a/src/Lifecycle.ts
+++ b/src/Lifecycle.ts
@@ -49,6 +49,7 @@ import {SSO_HOMESERVER_URL_KEY, SSO_ID_SERVER_URL_KEY} from "./BasePlatform";
 import ThreepidInviteStore from "./stores/ThreepidInviteStore";
 import CountlyAnalytics from "./CountlyAnalytics";
 import CallHandler from './CallHandler';
+import LifecycleCustomisations from "./customisations/Lifecycle";
 
 const HOMESERVER_URL_KEY = "mx_hs_url";
 const ID_SERVER_URL_KEY = "mx_is_url";
@@ -716,6 +717,7 @@ export async function onLoggedOut(): Promise<void> {
     dis.dispatch({action: 'on_logged_out'}, true);
     stopMatrixClient();
     await clearStorage({deleteEverything: true});
+    LifecycleCustomisations.onLoggedOutAndStorageCleared?.();
 }
 
 /**
diff --git a/src/customisations/Lifecycle.ts b/src/customisations/Lifecycle.ts
new file mode 100644
index 0000000000..eba2af715a
--- /dev/null
+++ b/src/customisations/Lifecycle.ts
@@ -0,0 +1,30 @@
+/*
+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.
+*/
+
+function onLoggedOutAndStorageCleared(): void {
+    // E.g. redirect user or call other APIs after logout
+}
+
+// This interface summarises all available customisation points and also marks
+// them all as optional. This allows customisers to only define and export the
+// customisations they need while still maintaining type safety.
+export interface ILifecycleCustomisations {
+    onLoggedOutAndStorageCleared?: typeof onLoggedOutAndStorageCleared;
+}
+
+// A real customisation module will define and export one or more of the
+// customisation points that make up `ILifecycleCustomisations`.
+export default {} as ILifecycleCustomisations;
diff --git a/src/customisations/Security.ts b/src/customisations/Security.ts
index eb7c27dcc5..96b5b62cdb 100644
--- a/src/customisations/Security.ts
+++ b/src/customisations/Security.ts
@@ -67,24 +67,13 @@ function setupEncryptionNeeded(kind: SetupEncryptionKind): boolean {
 // them all as optional. This allows customisers to only define and export the
 // customisations they need while still maintaining type safety.
 export interface ISecurityCustomisations {
-    examineLoginResponse?: (
-        response: any,
-        credentials: IMatrixClientCreds,
-    ) => void;
-    persistCredentials?: (
-        credentials: IMatrixClientCreds,
-    ) => void;
-    createSecretStorageKey?: () => Uint8Array,
-    getSecretStorageKey?: () => Uint8Array,
-    catchAccessSecretStorageError?: (
-        e: Error,
-    ) => void,
-    setupEncryptionNeeded?: (
-        kind: SetupEncryptionKind,
-    ) => boolean,
-    getDehydrationKey?: (
-        keyInfo: ISecretStorageKeyInfo,
-    ) => Promise<Uint8Array>,
+    examineLoginResponse?: typeof examineLoginResponse;
+    persistCredentials?: typeof persistCredentials;
+    createSecretStorageKey?: typeof createSecretStorageKey,
+    getSecretStorageKey?: typeof getSecretStorageKey,
+    catchAccessSecretStorageError?: typeof catchAccessSecretStorageError,
+    setupEncryptionNeeded?: typeof setupEncryptionNeeded,
+    getDehydrationKey?: typeof getDehydrationKey,
 }
 
 // A real customisation module will define and export one or more of the