syn_derive is used at run time in 1,360 crates (of which 66 optionally). It is a direct run-time dependency in 6 crates. It's used at build time in 2 crates (of which 2 optionally, ). It's used only as a dev dependency in 34 crates.

Depender (with downloads and own rev deps) syn_derive version
1.2M 51 borsh-derive ^0.1.6
34K 18 rstml ^0.1.6
280 1 chandeliers-syn ^0.1.7
240 1 odra-macros ^0.1.8
forward-traits ^0.1
1 html-node-macro optional ^0.1