Implementations

This wiki tracks known implementations of QUIC. See also our Tools listing. Current interop 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.

Note

If you are working on a QUIC implementation, please consider joining the QUIC 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.

IETF QUIC Transport

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

aioquic

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.

Akamai QUIC

Roles: Server
Public server: ietf.akaquic.com:443
Version: draft-29
Protocol IDs: 0xff00001d
Handshake: TLS 1.3 RFC

AppleQUIC

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

ats

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)

Chromium

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.

f5

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 and hq-32 available upon request.
Public server: f5quic.com:4433. spin, logging, and retry on f5quic.com:4434.

Haskell quic

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

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

lsquic

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 at openlitespeed.org in both source and package forms. Bindings are available for Crystal and Lisp.

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.

MsQuic

Microsoft's general purpose (cross-platform) QUIC implementation. Optimized for high performance. More documentation here.

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

mvfst

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

Neqo

Mozilla/Firefox QUIC and HTTP3 implementation.

Language: Rust
Version: draft-27 through version 1.
Roles: library, client, server (server is primarily for client testing)
Handshake: TLS 1.3
Protocol IDs: 0x1, h3
Public server: None

ngtcp2

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, and 0xff000020
Public server: nghttp2.org:4433, nghttp2.org:443

nginx

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)

nginx-cloudflare

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

Language: C
Version: draft-27, draft-28, draft-29
Roles: server
Handshake: TLSv1.3 (RFC8446)
Protocol IDs: 0xff00001b, 0xff00001c, 0xff00001d
Public server: cloudflare-quic.com:443 (HTTP/3 only)

picoquic

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 at https://test.privateoctopus.com/). Use port 4434 to test retries.

Pluginized QUIC

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

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

QUANT is a general transport library and does NOT 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, see wiki for description)

quiche

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-27, draft-28, draft-29
Roles: library, client, server
Handshake: TLSv1.3 (RFC8446)
Protocol IDs: 0x00000001, 0xff00001b, 0xff00001c, 0xff00001d
Public server: quic.tech:4433 (HTTP/0.9 + 0-RTT) / quic.tech:8443 (HTTP/3 + 0-RTT) / quic.tech:8444 (HTTP/3 + Retry)

quicly

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)

Quinn

Rust implementation based on tokio/futures, using rustls for TLS.

Language: Rust
Version: draft-28
Roles: library, client, server
Handshake: TLS 1.3
Protocol IDs: 0xff00001c
Public server: h3.stammw.eu:443

quic-go

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

s2n-quic

Language: Rust
Version: v1
Roles: library, client, server
Handshake: TLS 1.3
Protocol IDs: 0x00000001

XQUIC

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

HTTP/3

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

Akamai QUIC

See entry in the "IETF QUIC Transport" section.

Chromium

See entry in the "IETF QUIC Transport" section.

Flupke

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: -

lsquic

LiteSpeed QUIC and HTTP/3 library. Works on Linux, FreeBSD, MacOS, and Windows. Turn-key open-source web server that uses lsquic is available at openlitespeed.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

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