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Rustls Alternatives
Similar projects and alternatives to rustls
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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ripgrep
ripgrep recursively searches directories for a regex pattern while respecting your gitignore
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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F#
Discontinued Please file issues or pull requests here: https://github.com/dotnet/fsharp (by fsharp)
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OpenSSL-2022
Operational information regarding CVE-2022-3602 and CVE-2022-3786, two vulnerabilities in OpenSSL 3
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better rustls alternative or higher similarity.
rustls discussion
rustls reviews and mentions
Posts with mentions or reviews of rustls.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-10-22.
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Convert enum into/from number in Rust
This document provides my intention of enum_builder! macro in rustls crate.
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Rustls Outperforms OpenSSL and BoringSSL
As a library vying to replace OpenSSL, the same set of suites as OpenSSL.
I'm no longer blocked on this particular issue that I filed on behalf of my work at Deno, but they aren't interested in adding less-secure suites that may be required by certain server configurations, but still appropriate for traffic that isn't general web-use.
https://github.com/rustls/rustls/issues/1607
At some point I had a list of suites required to connect to some older versions of MySQL/Microsoft SQL Server, but again, no longer blocked.
For server-to-server use where I don't control one end of the equation, I stick with the OpenSSL crate. If there's potentially older servers in the mix, I'm OK with using rustls as a backend for things like reqwest, but it'll be openssl for servers for now.
I understand the philosophy, but rustls is never going to be an OpenSSL drop-in until this approach changes.
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RustPython: A Python Interpreter Written in Rust
Interesting that it relies on OpenSSL, either dynamically from the OS or vendored at compile time. I wonder what the implications would be for using something like rustls. You’d get TLS batteries included and kill a large external dependency… but possibly introduce behavior changes to low-level cryptographic operations, which is scary.
Still, the maintainers stated that they don’t plan to implement Python’s readline module because they already have a rust implementation of readline. A similar argument could apply here - use native rust implementations of dependencies and expose them via the expected Python APIs. This would break some ambitious Python programs, but those probably wouldn’t consider alternative runtimes anyway.
https://github.com/rustls/rustls
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FOSS funding vanishes from EU's 2025 Horizon program plans
> memory safe openssl
This is closer to done than not done. Rustls (https://www.memorysafety.org/initiative/rustls/) is a memory safe TLS library that is compatible with OpenSSL in API and has comparable performance. It has also passed security audits (https://github.com/rustls/rustls/blob/main/audit/TLS-01-repo...)
But your point stands. Rustls wouldn’t have been possible without open source funding.
- Pingora: HTTP Server and Proxy Library, in Rust, by Cloudflare, Released
- Alternative to openssl for reqwest https with client certs.
- rustls 0.22 is out with pluggable crypto providers and better CRL support
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Exploring the Rust compiler benchmark suite
The RustTLS project is currently setting up their own CI benchmarking workflow, so I think that you could find some inspiration there: https://github.com/rustls/rustls/issues/1385 and https://github.com/rustls/rustls/issues/1205.
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What are the scenarios where "Rewrite it in Rust" didn't meet your expectations or couldn't be successfully implemented?
I also studied this question on FFI several weeks ago in terms of "rewrite part of the system in Rust". Unexpected results could be semantic issues (e.g., different error handling methods) or security issues (FFI could be a soundness hole). I suggest going through the issues of libraries that have started rewriting work such as rust-openssl or rustls (This is the one trying to rewrite in whole rust rather than using FFI; however, you will not be able to find the mapping function in the C version and compare them). I hope this helps!
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A brief guide to choosing TLS crates
Now for rust implementation of tls. Certificates can be loaded in two ways. * Finds and loads certificates using OS specific tools3 * Uses a rust implementation of webpki4 for loading with certificates5
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A note from our sponsor - InfluxDB
www.influxdata.com | 24 May 2025
Stats
Basic rustls repo stats
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rustls/rustls is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
The primary programming language of rustls is Rust.
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