Ocb3 is used at run time in 27 crates (of which 1 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 3 crates (of which 1 directly).

Depender (with downloads and own rev deps) Ocb3 version
76K 39 pgp ^0.1
350 cmail-rpgp ^0.1
200 vpgp ^0.1
ecdh-omr dev ^0.1.0