Crate

futures

Core async primitives and combinators for Rust.

What it is

The futures crate provides foundational async building blocks: Stream, Sink, AsyncRead, and AsyncWrite traits, and combinators via FutureExt and StreamExt. It also includes in-process channels, locks, and executor utilities used by runtime-agnostic library code.

Why it is commonly used

The foundational async abstraction layer in Rust. Libraries implement against futures' traits to remain runtime-agnostic. Tokio, async-std, and other runtimes interoperate through these common types.

1.8k
Repositories
89%
Actively maintained
1.6k
Updated ≤ 30 days
4.7M
Total stars
1.5k
Owners

Counted from the Cargo.toml manifests of the 1.8k indexed repositories that declare futures as a dependency — not download counts. Dependency data last verified 2026-08-13.

Browse 1756 repositories using futures in Repos →
Often used with

Crates that show up unusually often in futures projects. The most distinctive pairings rank first — crates these projects use far more than the average indexed Rust project does, not just crates that are popular everywhere. Each percentage is the share of futures projects that also use it.

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Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, code-like database branching, and scale to zero.

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