There are 2 open-source alternatives to Firebase Realtime Database in this directory. The most popular is SpacetimeDB with 18.7k GitHub stars, followed by Liveblocks(4.5k stars). All are open source, free to use, and many can be self-hosted.
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | SpacetimeDB SpacetimeDB is a high-performance multiplayer database designed for real-time game and application development, enabling low-latency synchronization and seamless state sharing between clients. | 18.7k | Rust | Other |
| 2 | Liveblocks Liveblocks provides customizable, real-time collaborative features—presence, comments, storage, and AI-powered workflows—to turn your app into a multiplayer experience. Designed for modern apps needing real-time collaboration and seamless user interaction, Liveblocks enables developers to easily integrate collaborative and AI-ready features without overhauling their product roadmap. | 4.5k | TypeScript | Apache License 2.0 |
SpacetimeDB is a high-performance multiplayer database designed for real-time game and application development, enabling low-latency synchronization and seamless state sharing between clients.
Liveblocks provides customizable, real-time collaborative features—presence, comments, storage, and AI-powered workflows—to turn your app into a multiplayer experience. Designed for modern apps needing real-time collaboration and seamless user interaction, Liveblocks enables developers to easily integrate collaborative and AI-ready features without overhauling their product roadmap.
The top three are SpacetimeDB(18.7k stars), Liveblocks(4.5k stars). All are open source and free to use.
Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.
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