diff --git a/src/lib/accountKeyStore.ts b/src/lib/accountKeyStore.ts
index c4baa91..ebe7dd6 100644
--- a/src/lib/accountKeyStore.ts
+++ b/src/lib/accountKeyStore.ts
@@ -1,7 +1,7 @@
 import { BlahKeyPair, BlahPublicKey, type EncodedBlahKeyPair } from '@blah-im/core/crypto';
 import { openDB, type DBSchema, type IDBPDatabase } from 'idb';
 
-const IDB_NAME = 'blah-accounts';
+const IDB_NAME = 'weblah-accounts';
 const IDB_OBJECT_STORE_NAME = 'accounts';
 
 type SavedObject = {
diff --git a/src/lib/profileStore.ts b/src/lib/profileStore.ts
new file mode 100644
index 0000000..f3e6b56
--- /dev/null
+++ b/src/lib/profileStore.ts
@@ -0,0 +1,56 @@
+import type { BlahProfile } from '@blah-im/core/identity';
+import { openDB, type DBSchema, type IDBPDatabase } from 'idb';
+
+const IDB_NAME = 'weblah-profiles';
+const IDB_OBJECT_STORE_NAME = 'profiles';
+
+const PROFILE_MAX_AGE = 1000 * 60 * 60 * 24 * 30; // 30 days
+
+interface ProfileStoreDB extends DBSchema {
+	[IDB_OBJECT_STORE_NAME]: {
+		key: string;
+		value: BlahProfile & { idKeyId: string; lastUpdatedAt: Date };
+		indexes: { id_urls: string };
+	};
+}
+
+export class ProfileStore {
+	private db: IDBPDatabase<ProfileStoreDB>;
+
+	private constructor(db: IDBPDatabase<ProfileStoreDB>) {
+		this.db = db;
+	}
+
+	static async open(): Promise<ProfileStore> {
+		const db = await openDB<ProfileStoreDB>(IDB_NAME, 1, {
+			upgrade(db) {
+				if (!db.objectStoreNames.contains(IDB_OBJECT_STORE_NAME)) {
+					const store = db.createObjectStore(IDB_OBJECT_STORE_NAME, { keyPath: 'idKeyId' });
+					store.createIndex('id_urls', 'id_urls', { multiEntry: true, unique: true });
+				}
+			}
+		});
+
+		const store = new ProfileStore(db);
+		await store.removeOldProfiles();
+		return store;
+	}
+
+	async updateProfile(idKeyId: string, profile: BlahProfile): Promise<void> {
+		await this.db.put(IDB_OBJECT_STORE_NAME, { idKeyId, ...profile, lastUpdatedAt: new Date() });
+	}
+
+	async getProfile(idKeyId: string): Promise<BlahProfile | undefined> {
+		return await this.db.get(IDB_OBJECT_STORE_NAME, idKeyId);
+	}
+
+	async getProfileByIdUrl(idUrl: string): Promise<BlahProfile | undefined> {
+		return await this.db.getFromIndex(IDB_OBJECT_STORE_NAME, 'id_urls', idUrl);
+	}
+
+	async removeOldProfiles(): Promise<void> {
+		const now = new Date();
+		const cutoff = new Date(now.getTime() - PROFILE_MAX_AGE);
+		await this.db.delete(IDB_OBJECT_STORE_NAME, IDBKeyRange.upperBound(cutoff));
+	}
+}