Hosted backend-as-a-service providing a managed database, serverless functions, real-time queries, and authentication integrations for building and running web applications without operating backend infrastructure.
Supabase is an open source Postgres development platform providing authentication, auto-generated REST/GraphQL APIs, realtime subscriptions, edge functions, file storage, and vector embeddings.
107.1k stars13.3k forksApache-2.0last commit Actively maintained
Open-source Go backend providing embedded SQLite, realtime (SSE) subscriptions, auth (JWT/OAuth2), file storage, admin UI and REST-style APIs for web and mobile apps.
60.3k stars3.6k forksMITlast commit Actively maintained
TrailBase is a fast, single-executable Firebase alternative with type-safe REST and realtime APIs, built-in auth, admin UI, WebAssembly extensibility, and SQLite storage.
5.4k stars183 forksOSL-3.0last commit Actively maintained
bknd is a lightweight Firebase/Supabase alternative that provides a modular backend with REST API, admin UI, auth, media, and workflows, deployable across many JS runtimes.
3.7k stars144 forksApache-2.0last commit Actively maintained
MongooseIM is an open-source Erlang-based XMPP server designed for large-scale messaging, offering multi-tenant deployment, REST/GraphQL APIs, push, and robust observability.
1.7k stars439 forkslast commit Actively maintained
Para is an open-source, Java-based multitenant backend framework providing a RESTful JSON API, full-text search, distributed caching, and flexible authentication for web, mobile, IoT and prototype apps.
574 stars156 forksApache-2.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 6 of 6 shipped a commit in the last six months. Licences in this list: Apache-2.0, MIT, OSL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Backend-as-a-Service (BaaS).
