diff --git a/packages/zero-client/src/client/zero-idbname.test.ts b/packages/zero-client/src/client/zero-idb.test.ts
similarity index 61%
rename from packages/zero-client/src/client/zero-idbname.test.ts
rename to packages/zero-client/src/client/zero-idb.test.ts
index fcb485ed61..c17068c814 100644
--- a/packages/zero-client/src/client/zero-idbname.test.ts
+++ b/packages/zero-client/src/client/zero-idb.test.ts
@@ -1,4 +1,5 @@
 import {expect, test} from 'vitest';
+import {hasMemStore} from '../../../replicache/src/kv/mem-store.ts';
 import {h64} from '../../../shared/src/hash.ts';
 import {createSchema} from '../../../zero-schema/src/builder/schema-builder.ts';
 import {string, table} from '../../../zero-schema/src/builder/table-builder.ts';
@@ -15,6 +16,18 @@ const schema = createSchema({
   ],
 });
 
+const schemaV2 = createSchema({
+  tables: [
+    table('foo')
+      .columns({
+        id: string(),
+        value: string(),
+        value2: string(),
+      })
+      .primaryKey('id'),
+  ],
+});
+
 const userID = 'test-user';
 const storageKey = 'test-storage';
 
@@ -95,3 +108,52 @@ test('idbName generation with URL configuration', async () => {
     await zero.close();
   }
 });
+
+test('delete closes and removes all databases for the same zero instance', async () => {
+  const userIDForDrop = 'drop-db-user';
+  const storageKeyForDrop = 'drop-db-storage';
+
+  const zOld = new Zero({
+    userID: userIDForDrop,
+    storageKey: storageKeyForDrop,
+    schema,
+    kvStore: 'mem',
+  });
+  const oldDBName = zOld.idbName;
+  await zOld.close();
+
+  const zCurrent = new Zero({
+    userID: userIDForDrop,
+    storageKey: storageKeyForDrop,
+    schema: schemaV2,
+    kvStore: 'mem',
+  });
+  const currentDBName = zCurrent.idbName;
+
+  const zOther = new Zero({
+    userID: 'drop-db-other-user',
+    storageKey: 'drop-db-other-storage',
+    schema,
+    kvStore: 'mem',
+  });
+  const otherDBName = zOther.idbName;
+
+  expect(zCurrent.closed).toBe(false);
+  expect(hasMemStore(oldDBName)).toBe(true);
+  expect(hasMemStore(currentDBName)).toBe(true);
+  expect(hasMemStore(otherDBName)).toBe(true);
+
+  const result = await zCurrent.delete();
+
+  expect(zCurrent.closed).toBe(true);
+  expect(result.errors).toHaveLength(0);
+  expect(result.deleted).toContain(oldDBName);
+  expect(result.deleted).toContain(currentDBName);
+  expect(hasMemStore(oldDBName)).toBe(false);
+  expect(hasMemStore(currentDBName)).toBe(false);
+
+  expect(hasMemStore(otherDBName)).toBe(true);
+
+  await zOther.close();
+  await zOther.delete();
+});
diff --git a/packages/zero-client/src/client/zero.ts b/packages/zero-client/src/client/zero.ts
index e7b335c797..6db317702c 100644
--- a/packages/zero-client/src/client/zero.ts
+++ b/packages/zero-client/src/client/zero.ts
@@ -1,11 +1,13 @@
 import {LogContext, type LogLevel} from '@rocicorp/logger';
 import {type Resolver, resolver} from '@rocicorp/resolver';
 import {type DeletedClients} from '../../../replicache/src/deleted-clients.ts';
+import {getKVStoreProvider} from '../../../replicache/src/get-kv-store-provider.ts';
 import {
   ReplicacheImpl,
   type ReplicacheImplOptions,
 } from '../../../replicache/src/impl.ts';
-import {dropDatabase} from '../../../replicache/src/persist/collect-idb-databases.ts';
+import {dropDatabase as dropReplicacheDatabase} from '../../../replicache/src/persist/collect-idb-databases.ts';
+import {IDBDatabasesStore} from '../../../replicache/src/persist/idb-databases-store.ts';
 import type {Puller, PullerResult} from '../../../replicache/src/puller.ts';
 import type {Pusher, PusherResult} from '../../../replicache/src/pusher.ts';
 import type {ReplicacheOptions} from '../../../replicache/src/replicache-options.ts';
@@ -430,6 +432,7 @@ export class Zero<
   #totalToConnectStart: number | undefined = undefined;
 
   readonly #options: ZeroOptions<S, MD, C>;
+  readonly #kvStore: ZeroOptions<S, MD, C>['kvStore'];
 
   /**
    * Query builders for each table in the schema.
@@ -496,6 +499,8 @@ export class Zero<
       });
     }
 
+    this.#kvStore = kvStore;
+
     this.pingTimeoutMs = pingTimeoutMs;
 
     this.#onlineManager = new OnlineManager();
@@ -1409,7 +1414,9 @@ export class Zero<
       kind === ErrorKind.InvalidConnectionRequestLastMutationID ||
       kind === ErrorKind.InvalidConnectionRequestBaseCookie
     ) {
-      await dropDatabase(this.#rep.idbName);
+      await dropReplicacheDatabase(this.#rep.idbName, {
+        kvStore: this.#kvStore,
+      });
       reloadWithReason(lc, this.#reload, kind, serverAheadReloadReason);
     }
   }
@@ -2387,6 +2394,40 @@ export class Zero<
     }
   }
 
+  async delete(): Promise<{deleted: string[]; errors: unknown[]}> {
+    await this.close();
+
+    const kvStoreProvider = getKVStoreProvider(this.#lc, this.#kvStore);
+    const idbDatabasesStore = new IDBDatabasesStore(kvStoreProvider.create);
+    try {
+      const databases = await idbDatabasesStore.getDatabases();
+      const dbNamesToDelete = Object.values(databases)
+        .filter(database => database.replicacheName === this.#rep.name)
+        .map(database => database.name);
+
+      const deleteResults = await Promise.allSettled(
+        dbNamesToDelete.map(async dbName => {
+          await dropReplicacheDatabase(dbName, {kvStore: this.#kvStore});
+          return dbName;
+        }),
+      );
+
+      const deleted: string[] = [];
+      const errors: unknown[] = [];
+      for (const result of deleteResults) {
+        if (result.status === 'fulfilled') {
+          deleted.push(result.value);
+        } else {
+          errors.push(result.reason);
+        }
+      }
+
+      return {deleted, errors};
+    } finally {
+      await idbDatabasesStore.close();
+    }
+  }
+
   #addMetric: <K extends keyof MetricMap>(
     metric: K,
     value: number,