SpacetimeDB – A database that replaces your server
We just released our database, SpacetimeDB, on GitHub under the BSL 1.1 license. It converts to a free software license after a few years. The point of the database is that you upload application logic into the database as a WebAssembly stored procedure, so instead of clients connecting to a webserver they connect directly to the database. The database itself does authentication and you write your own authorization logic just like you would inside a webserver. We’ve developed our game, BitCraft (https://bitcraftonline.com) entirely in this way. All of the game state is stored and…
In plain words
SpacetimeDB is a database that lets developers upload application logic as WebAssembly stored procedures, eliminating the need for a separate web server. Clients connect directly to the database, which handles authentication and authorization. The makers built the game BitCraft entirely with this architecture, storing and syncing all game state directly through the database. SpacetimeDB is available on GitHub under the BSL 1.1 license, which converts to a free software license after several years. It's designed for developers building real-time applications that require direct client-database communication.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
We just released our database, SpacetimeDB, on GitHub under the BSL 1.1 license. It converts to a free software license after a few years. The point of the database is that you upload application logic into the database as a WebAssembly stored procedure, so instead of clients connecting to a webserver they connect directly to the database. The database itself does authentication and you write your own authorization logic just like you would inside a webserver. We’ve developed our game, BitCraft (https://bitcraftonline.com) entirely in this way. All of the game state is stored and synchronized with clients via SpacetimeDB, including player positions and movement. We also plan to allow you to horizontally scale your applications in two ways: 1. By having multiple databases that can send messages to each other (i.e. the actor model) 2. By having distributed databases which partition data over multiple machines, similarly to CockroachDB, although this approach would cause a commensurate increase in latency in accessing data Curious to hear your thoughts! https://spacetimedb.com
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