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Open sourceMIT license

LSQUIC.

LiteSpeed's QUIC and HTTP/3 library, written in C for speed and a small footprint. It powers LiteSpeed's own products and is free to embed in yours.

GitHub HTTP/3 FAQ
MIT licenseClient & serverIETF QUIC

Highlights

IETF QUIC & HTTP/3

Implements the standardised QUIC transport and HTTP/3.

High performance

Designed for high throughput and low CPU use.

Easy to embed

Clean C API usable from servers, proxies and clients.

Portable

Builds on Linux, macOS, FreeBSD and Windows.

Congestion control

Supports Cubic and BBR.

Documented

Full API documentation and example programs.

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