Neqo, an Implementation of QUIC in Rust by mozilla
Neqo, the Mozilla Firefox implementation of QUIC in Rust
About Neqo, an Implementation of QUIC in Rust
From the project's README at github.com/mozilla/neqo. Lightly cleaned for readability; for the full source see the upstream repo.
Neqo is the QUIC implementation used by Mozilla in Firefox and other products. It is written in Rust and provides a library for QUIC transport, HTTP/3, and QPACK. The TLS security backend is the Mozilla NSS library, which is also used by Firefox.
Neqo is designed to be used in Firefox, but it can also be used standalone. We include command line tools for testing and debugging, such as and , which can be used to test HTTP/3 servers and clients.
Note: The neqo server functionality is experimental, since it is not in production use at Mozilla, and it is not as mature as the client functionality. It is intended to be standards-compliant when interoperating with a compliant client, but it may not implement all optional protocol features, and it may not handle all edge cases. It is also not optimized for performance or resource usage, and while it implements many of the necessary features for a server, it does not include configuration of a number of options that are suited to a live deployment. Do not use the neqo server code in production.
This will use a system-installed [NSS][NSS] library if it is new enough. (See "Build with separate NSS/NSPR" below if NSS is not installed or it is deemed too old.)
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 2.2k | github.com/mozilla/neqo |
| GitHub forks | 155 | github.com/mozilla/neqo |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 7.2 years | since Feb 2019 |
| Last commit | 3 days ago | May 4, 2026 |
| Releases shipped | 120 | last: 13 days ago |
| Security policy | SECURITY.md | declared by maintainers |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
Security advisories
CVE-2025-6703. What people say on Hacker News
- Mozilla is working on a big Firefox redesign, here is what it looks like
- Ask HN: How to stop an AWS bot sending 2B requests/month?
- Firefox profiles: Private, focused spaces for all the ways you browse
- Firefox feature gets special mention in TIME's Best Inventions of 2025
- Mozilla extends Firefox support on Windows 7 once again
Ready to self-host Neqo, an Implementation of QUIC in Rust?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
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