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s2n-tls

v0.3.35 Growing

A C99 implementation of the TLS/SSL protocols

Apache-2.0 Edition 2021 MSRV 1.72.0

Quick Verdict

  • โœ“Actively maintained (updated 25d ago)
  • !Pre-1.0: API may have breaking changes
  • โœ“Trusted by 276 crates
  • โœ“Team maintained (3 owners)
  • โœ“Permissive license (Apache-2.0)

Security

Checking security advisories...
Downloads
6.8M
Dependents
276
Releases
96
Size
87KB

Deep Insights

๐Ÿ“Š
Steady growth

604.4K downloads in the last 30 days (20.1K/day), up 4% from the previous period.

๐Ÿ”—
Moderate adoption

276 crates depend on s2n-tls. Reasonable ecosystem adoption, though not yet a core dependency.

๐Ÿ‘ค
Prolific maintainer

The primary maintainer publishes 51 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 4+ years old, s2n-tls hasn't reached 1.0 yet. Expect potential API changes between versions.

๐ŸŒŸ
Used by top crates

Notable dependents include aws-smithy-http-client, s2n-tls-tokio, s2n-quic-tls, s2n-tls-hyper, s2n-quic-dc. When high-quality crates choose s2n-tls, it's a strong quality signal.

Health Breakdown

Maintenance 17/25

Recency, release consistency, active ratio

Quality 16/25

Yanked ratio, deps, size, maturity, features

Community 13/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
19K/day avg+3%
05K10K15K20K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v0.0.41
93%
v0.3.19
3%
v0.3.34
1%
v0.3.35
1%
v0.3.9
1%

Release Timeline

96 releases1 yankedsince 2021
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A
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2021
1
2022
21
2023
21
2024
28
2025
22
2026
3
Less
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Yanked

Feature Flags

pqfipsquicunstable-crlunstable-ktlsunstable-eventsunstable-testingunstable-fingerprintunstable-renegotiateunstable-cert_authoritiesunstable-custom_x509_extensions

README

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Maintainers

Dependencies
11
direct dependencies
Dependents
276
crates depend on s2n-tls