| Microsoft's MsQuic | draft-27/28/29/30/31/32 | client, server | TLS 1.3 RFC |
| Facebook's mvfst | draft-29 | library, client, server | TLS 1.3 |
| Google's Chromium | Q043, Q046, Q050, T050, T051, draft-27, draft-29 | library, client, server | QUIC Crypto, TLS |
| ats (Apache Traffic Server) | draft-29 | client. server | TLS 1.3 |
| LiteSpeed's lsquic | Draft-32, Draft-29, Draft-28, Draft-27, Q043, Q046, and Q050. | library, client, server | QUIC Crypto, RFC 8446 |
| ngtcp2 | draft-29, draft-30, draft-31, and draft-32 | library, client, server | TLSv1.3 (RFC 8446) |
| Cloudflare's nginx-cloudflare | draft-27, draft-28, draft-29 | server | TLSv1.3 (RFC8446) |
| picoquic | draft-32/31/30/29/28/27 | library and test tools, test client, test server | TLS 1.3 (using picotls) |
| Pluginized QUIC | draft-29 | library, client, server | TLS 1.3 (using picotls) |
| quant | draft-33, draft-34, v1 | library, client, server | TLS 1.3 |
| Fastly's quicly | draft-27 | client, server | TLS 1.3 (final) |
| nginx-quic | draft-27 .. draft-32 | server | TLSv1.3 (RFC8446) |
| Alibaba's xquic | draft-29 | library | TLSv1.3 |
| Google's quiche | draft-29 | library | TLSv1.3 |