SpacetimeDB Creator Tyler Cloutier explains why Rust was critical for SpacetimeDB

Code to the Moon

The creator of SpacetimeDB explains why Rust was the only viable language choice for building the database. Key requirements included fine-grained allocation control (transactions must complete within microseconds, ruling out garbage-collected languages like Go), and compile-time memory safety guarantees essential for a multi-tenant environment where user code runs inside the database via WebAssembly. C and C++ were considered but lack Rust's safety properties. Zig was noted as an interesting alternative but not yet mature enough on safety.

Rust Was Critical for SpacetimeDB