
neqo
Neqo, the Mozilla Firefox implementation of QUIC in Rust
The Lens
neqo is Mozilla's implementation of QUIC and HTTP/3 written in Rust, the same code that powers networking inside Firefox. QUIC is a faster, more reliable replacement for TCP, the protocol most internet traffic still rides on, and HTTP/3 is the newest version of the web protocol built on top of it. neqo gives you QUIC transport, HTTP/3, and QPACK header compression as Rust libraries, dual-licensed under Apache 2.0 and MIT.
This is not an app you install. It's library code you compile into your own networking software, plus a couple of command-line tools for testing HTTP/3 clients and servers. Using it means working at the protocol level in Rust, deep specialized engineering, not a weekend integration.
Who is this for: teams building browsers, networking stacks, or protocol-level tooling who need a real QUIC implementation and want Mozilla's. Everyone else almost certainly wants a higher-level library like quinn instead. There is no paywall and no team-size split, since it's a building block, not a product.
The catch: Mozilla flat out says the server side is experimental and warns against running it in production. The client and transport are battle-tested inside Firefox, but treat the server code as a lab tool, not something you put in front of real traffic.
Free vs Self-Hosted vs Paid
fully freeFree tier: All of it. Dual-licensed under Apache 2.0 and MIT. This is Mozilla's QUIC and HTTP/3 implementation, shipped as Rust libraries.
Self-hosted: It's a library you build into your own software, plus test command-line tools (neqo-client, neqo-server). You compile and embed it; there's no service to run.
Paid: None. It's a Mozilla open source project, free with no commercial tier.
Free under Apache 2.0 and MIT. It's library code, not a service.
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License: Apache License 2.0
Use freely. Patent grant included.
Commercial use: ✓ Yes
About
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- Mozilla (Organization)
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