Experimental Rust QUIC implementation
Clone or download
Ralith Update recommended OpenSSL version
Fix tests to match its NewSessionTicket behavior while we're at it
Latest commit 36f1724 Jul 30, 2018



quicr is an implementation of the QUIC network protocol undergoing standardization by the IETF. It is currently suitable for experimental use. The implementation is split up into the state machine crate quicr-core which performs no IO internally and can be tested deterministically, and a high-level tokio-compatible API in quicr. See quicr/examples/ for usage.

Crates.io License: MIT License: Apache 2.0

API Docs


  • Simultaneous client/server operation
  • Ordered and unordered reads for improved performance


  • QUIC draft 11 with TLS 1.3 draft 28
  • Cryptographic handshake
  • Stream data w/ flow control and congestion control
  • Connection close
  • Stateless retry
  • Migration
  • 0-RTT data
  • Session resumption


Because TLS1.3 is a new standard, OpenSSL 1.1.1-pre8 (or later) is required for quicr to build.