Best Open Source Backend Service Projects

Supabase

The open source Firebase alternative.

★ 111,075 Updated: Oct 2026 Status: Active

Appwrite

Open-source backend server

★ 54,634 Updated: Feb 2026 Status: Slowing

Temporal

The durable execution system for resilient applications.

★ 23,458 Updated: Oct 2026 Status: Active

Kuzzle

Accelerate IoT development with ready-made backend

★ 1,628 Updated: Jan 2026 Status: Slowing