NBAs of 2025-06-09 the wiki is archived and these pages are no longer actively maintained.Please seehttps://github.com/quicwg/quicwg.github.io/blob/main/implementations.md for a better source of QUIC implementation information. Contributions to add new implementations or to update existing implementation details are welcome.

This wiki tracks known implementations of QUIC. See also ourTools listing. Currentinterop status; make sure you are looking at or editing the correct tab.

Please add your implementation below. Keep sorted alphabetically. There are three sections, one for "IETF QUIC Transport", one for "HTTP/3C", and one for "QPACK". Entries may appear in multiple sections e.g. where a stack provides both IETF QUIC Transport and HTTP/3.

If you are working on a QUIC implementation, please consider joining theQUIC Developers Slack Channel. Also, if possible, please set up a public server and publish its details below, so others can try and interoperate with your code.

The following stacks implement the IETF versions of QUIC Transport. They may include an application layer mapping other than IETF HTTP over QUIC e.g. HTTP/0.9

QUIC implementation using Python and asyncio.

• Language: Python
• Version: draft-29 through version 1
• Roles: client, server, library
• Handshake: TLS 1.3
• Protocol IDs:0xff00001d,0xff00001e,0xff00001f,0xff000020,0x1
• Public server:
  • quic.aiortc.org:443
  • quic.aiortc.org:4434 (Stateless Retry)applicable.

AppleQUIC is a client and server implementation.

• Language: C, Objective-C, Swift
• Version: draft-29 and version 1
• Roles: Client, Server
• Handshake: TLS 1.3 RFC
• Protocol IDs:0xff00001d +0x00000001
• Public server: N/A
• Vulnerability reporting:https://support.apple.com/en-us/HT201220

QUIC implementation in Apache Traffic Server

• Language: C++
• Version: draft-29
• Roles: Server, Client
• Handshake: TLS 1.3
• Protocol IDs:0xff00001d
• Public server:
  • quic.ogre.com:4433
  • quic.ogre.com:4434 (Stateless Retry)
  • quic.ogre.com:4443 (Preferred Address 4443 -> 4433)
  • https://quic.ogre.com/cgi-bin/quic_log.cgi (Debug logs)
• Vulnerability reporting:https://github.com/apache/trafficserver/security/policy

Chromium's QUIC Implementation (draft-29 supported in Chrome 85.0.4171.0 and later).

• Languages: C, C++
• Versions: Q043, Q046, Q050, T050, T051, draft-27, draft-29.
• Roles: library, client, server
• Handshakes: QUIC Crypto, TLS
• Protocol IDs:Q043,Q046,Q050,T050,T051,0xff00001b,0xff00001d
• ALPNs:h3-Q043,h3-Q046,h3-Q050,h3-T050,h3-T051,h3-27,h3-29
• Public Servers:
  • https://quic.rocks:4433
  • https://google.com
• Entry in Interop Matrix: ~gQUIC

NOTE: Not to be confused with Cloudflare quiche.

QUIC implementation in F5 TMOS

• Language: C
• Version: draft-29 and 32
• Roles: Server, Client
• Handshake: RFC 8446
• Protocol IDs:0xff00001d,0xff000020
• ALPN:h3-29,h3-32.hq-29 andhq-32 available upon request.
• Public server: f5quic.com:4433. spin, logging, and retry on f5quic.com:4434.

QUIC - HTTP/3 implementation in haproxy

• Language: C
• Version: draft-29, v1, v2
• Roles: server
• Handshake: TLSv1.3 (RFC8446)
• Protocol IDs:0xff00001d,0x00000001,0x709a50c4
• ALPN:h3-29,h3,hq-interop
• Public server:https://www.haproxy.org/,look out for "Site served using" section after a reload

• Language: Haskell
• Version: draft-29
• Roles: client, server, library
• Handshake: TLS 1.3
• Protocol IDs:0xff00001d
• Public server: mew.org:443, mew.org:4434 for stateless retry

Kwik is a QUIC client (and client library) implementation in Java.

• Language: Java
• Version: draft-29 through version 1
• Roles: client, client library, server
• Handshake: TLS 1.3
• Protocol IDs:0xff00001d,0xff00001e,0xff00001f,0xff000020,0x1

LiteSpeed QUIC and HTTP/3 library. Works on Linux, FreeBSD, MacOS, Android, and Windows. Turn-key open-source web server that uses lsquic is available atopenlitespeed.org in both source and package forms. Bindings are available forCrystal andLisp.

• Language: C
• Version: v1, Draft-34, Draft-29, Draft-27, Q043, Q046, and Q050.
• Roles: Client, Server, Library
• Handshake: QUIC Crypto, RFC 8446
• Protocol IDs:0x00000001,0xFF000022,0xFF00001D,0xFF00001B
• Public server:
  • http3-test.litespeedtech.com:4433, http3-test.litespeedtech.com:4434 (sends stateless retry packets), and http3-test.litespeedtech.com:4435 (faster downloads due to less logging), and :4437 (siduck-00 🦆) for v1, ID-34, ID-29, and ID-27 as well as Google QUIC versions Q043, Q046, and Q050
    • This server supports HTTP/3 and QPACK and provides some services to test transfer of data each way.GET / for details.
    • Delayed ACKs are supported -- versions -01 and -02.
  • www.litespeedtech.com:443 is our production web server.

Microsoft's general purpose (cross-platform) QUIC implementation. Optimized forhigh performance. More documentationhere.

• Platforms: Windows, Linux, macOS (alpha)
• Language: C
• Version: Draft-29 & v1
• Roles: client, server
• Handshake: TLS 1.3 RFC
• Protocol IDs:0xff00001D,0x1
• Public server: msquic.net or quic.westus.cloudapp.azure.com
• Vulnerability reporting:https://github.com/microsoft/msquic/security/policy

mvfst (pronounced move fast) is an implementation of QUIC by Facebook

• Language: C++
• Version: draft-29
• Roles: client, server, library
• Handshake: TLS 1.3
• Protocol IDs:0xff00001b
• Public server: fb.mvfst.net:443,www.facebook.com,www.instagram.com
• Vulnerability reporting:https://github.com/facebookincubator/mvfst/security/policy

Mozilla/Firefox QUIC and HTTP3 implementation.

• Language: Rust
• Version: draft-27 through version 1 and 2.
• Roles: library, client, server (server is primarily for client testing and has incomplete or missing support for important features like anti-amplification)
• Handshake: TLS 1.3
• Protocol IDs:0x1,0x709a50c4; h3
• Public server: None

ngtcp2 project is an effort to implement IETF QUIC protocol

• Language: C
• Version: v1, draft-29, draft-30, draft-31, and draft-32
• Roles: client, library, server
• Handshake: TLSv1.3 (RFC 8446)
• Protocol IDs:0x00000001,0xff00001d,0xff00001e,0xff00001f, and0xff000020
• Public server: nghttp2.org:4433, nghttp2.org:443
• Vulnerability reporting:https://nghttp2.org/documentation/security.html

QUIC and HTTP/3 server implementation in nginx

• Language: C
• Version: draft-27 .. draft-32
• Roles: server
• Handshake: TLSv1.3 (RFC8446)
• Protocol IDs:0xff00001b ..0xff000020
• Public server: quic.nginx.org:443 (draft-29)

Implementation of QUIC for NGINX based on quiche, by Cloudflare.

• Language: C
• Version: v1, draft-29
• Roles: server
• Handshake: TLSv1.3 (RFC8446)
• Protocol IDs:0x00000001,0xff00001d
• Public server: cloudflare-quic.com:443 (HTTP/3 only)
• Vulnerability reporting:https://github.com/cloudflare/quiche/security/policy

A small(ish) implementation of QUIC in C, to explore the protocol and the API, for example for DNS over QUIC. Relies on PicoTLS for TLS 1.3. MIT license. Tested on Windows, Linux, FreeBSD/IOS.

• Language: C
• Version: draft-32/31/30/29/28/27
• Roles: library and test tools, test client, test server
• Handshake: TLS 1.3 (using picotls)
• Protocol IDs:0xff000020,0xff00001f,0xff00001e,0xff00001d,0xff00001c,0xff00001b
• Public server: test.privateoctopus.com:4433 (server log accessible athttps://test.privateoctopus.com/). Use port 4434 to test retries.
• Vulnerability reporting:https://github.com/private-octopus/picoquic/security/policy

The PQUIC implementation, a framework that enables QUIC clients and servers to dynamically exchange protocol plugins that extend the protocol on a per-connection basis.

• Language: C (and eBPF)
• Version: draft-29
• Roles: library, client and server
• Handshake: TLS 1.3 (using picotls)
• Protocol IDs:0xff00001d
• Public server: test.pquic.org:443 (server logs not yet publicly available).

QUANT (QUIC Userspace Accelerated Network Transfers), a BSD-licensed C11 implementation on top of the zero-copywarpcore userspace UDP/IPv4 stack for thenetmap packet I/O framework. (Also works over the standard Sockets API.)

QUANT is a general transport library and doesNOT implement H3.

• Language: C
• Version: draft-33, draft-34, v1
• Roles: client, library, server
• Handshake: TLS1.3
• Protocol IDs:0xff000021,0xff000022,0x1
• Public server: quant.eggert.org:4433 (and more, seewiki for description)

quiche is an implementation of the QUIC transport protocol as specified by the IETF. It provides a low level API for processing QUIC packets and handling connection state, while leaving I/O (including dealing with sockets) to the application. Example client and server are also provided.

NOTE: Not to be confused with Google QUICHE.

• Language: Rust
• Version: v1, draft-29
• Roles: library, client, server
• Handshake: TLSv1.3 (RFC8446)
• Protocol IDs:0x00000001,0xff00001d
• Public server: quic.tech:4433 (HTTP/0.9 + 0-RTT) / quic.tech:8443 (HTTP/3 + 0-RTT) / quic.tech:8444 (HTTP/3 + Retry)
• Vulnerability reporting:https://github.com/cloudflare/quiche/security/policy

QUIC protocol implementation for H2O server

• Language: C
• Version: draft-27
• Roles: client and server
• Handshake: TLS 1.3 (final)
• Protocol IDs:
• Public server:
  • quic.examp1e.net:4433 (HTTP/0.9)
  • quic.examp1e.net:443 (HTTP/3)
• Vulnerability reporting:https://github.com/h2o/h2o/security/policy

Rust implementation with both a synchronous (sans-I/O) interface and an async interface, using rustls for TLS.

• Language: Rust
• Version: draft-29 - draft-31, v1, v2
• Roles: library, client, server
• Handshake: TLS 1.3

A QUIC implementation in Go.

• Language: Go
• Version: always the current draft
• Roles: client, library, server
• Handshake: TLS 1.3 RFC
• Protocol IDs:
• Public server:https://interop.seemann.io
• Vulnerability reporting:https://github.com/quic-go/quic-go/security/policy

• Language: Rust
• Version: v1
• Roles: library, client, server
• Handshake: TLS 1.3
• Protocol IDs:0x00000001
• Vulnerability reporting:https://github.com/aws/s2n-quic/security/policy

XQUIC Library released by Alibaba is a cross-platform implementation of IETF QUIC and HTTP/3 protocol.

• Platforms: Linux, macOS, Android, iOS
• Language: C
• Version: v1, Draft-29
• Roles: Client, Server, Library
• Handshake: TLSv1.3 (RFC8446)
• Protocol IDs: 0x00000001, 0xFF00001D
• Vulnerability reporting:https://github.com/alibaba/xquic/security/policy

The following implement HTTP/3. The "Transport library" field identifies one (or more) of the above stacks if applicable.

See entry in the "IETF QUIC Transport" section.

Flupke is a HTTP3 client build on top of Kwik.

• Language: Java
• Transport library:Kwik
• HTTP3 Version: draft-29 through version 1
• QUIC Verson: draft-29 through version 1
• Roles: client, client library, server
• Public server: -

LiteSpeed QUIC and HTTP/3 library. Works on Linux, FreeBSD, MacOS, and Windows. Turn-key open-source web server that uses lsquic is available atopenlitespeed.org in both source and package forms.

• Language: C
• Transport Library: lsquic
• Version: v1, Draft-34, Draft-29, Draft-27.
• Roles: Client, Server, Library
• Protocol IDs:0x00000001,0xFF000022,0xFF00001D,0xFF00001B
• Public server:www.litespeedtech.com:443

nghttp3 is an implementation of HTTP/3 mapping over QUIC and QPACK in C.It does not depend on any particular QUIC transport implementation.

• Language: C
• Transport library: It does not depend on any particular QUIC transport library.
• HTTP over QUIC Version: draft-32
• Roles: library
• Public server: nghttp2.org:4433

proxygen implements HTTP/3 mapping over QUIC and QPACK in C++, with MVFST as the transport.

• Language: C++
• Transport library: MVFST
• HTTP over QUIC Version: draft-23
• Roles: library, sample server/client
• Public server: fb.mvfst.net:4433, facebook.com:443
• Vulnerability reporting:https://github.com/facebook/proxygen/security/policy

See entry in the "IETF QUIC Transport" section.

See entry in the "IETF QUIC Transport" section.

A standalone, portable library (Linux, FreeBSD, Windows, MacOS) written in vanilla C. Bindings are available forGo,Python, andTypeScript.

• Language: C
• Version:-21

• Language: C
• Version:-03

• Language: C
• Version:-18

• Language: Rust
• Version:-21

• Language: C++
• Version:-10

See entry in the "IETF QUIC Transport" section.

• Language: C
• Version:-21