h3-datagram is used at run time in 6 crates (of which 3 optionally). It is a direct run-time dependency in 4 crates.

Depender (with downloads and own rev deps) h3-datagram version
38K 20 h3-quinn optional ^0.0.1
1.9K 1 salvo-http3 ^0.0.1
280 h3-shim ^0.0.1
160 h3-webtransport ^0.0.1