Crate

rustls

Modern TLS implementation in pure Rust — no C code.

What it is

rustls is a TLS 1.2 and 1.3 implementation written entirely in Rust. It handles certificate verification, mutual authentication, and session resumption. It integrates with tokio via tokio-rustls and replaces OpenSSL-based TLS in the Rust ecosystem.

Why it is commonly used

Used in security-conscious applications and where OpenSSL is undesirable — embedded systems, WebAssembly targets, and production services that require memory-safe TLS without C library dependencies or OpenSSL version management.

768
Repositories
93%
Actively maintained
713
Updated ≤ 30 days
2.7M
Total stars
694
Owners

Counted from the Cargo.toml manifests of the 768 indexed repositories that declare rustls as a dependency — not download counts. Dependency data last verified 2026-08-13.

Browse 768 repositories using rustls in Repos →
Often used with

Crates that show up unusually often in rustls 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 rustls projects that also use it.

Used by these organizations
50 of 768 repositories · ranked by stars · 713 pushed in the last 30 days
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Open-source developer platform to power your entire infra and turn scripts into webhooks, workflows and UIs. Fastest workflow engine (13x vs Airflow). Open-source alternative to Retool and Temporal.

sqlx17kmaintenance

🧰 The Rust SQL Toolkit. An async, pure Rust SQL crate featuring compile-time checked queries without a DSL. Supports PostgreSQL, MySQL, and SQLite.

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dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.

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