addchain is used at run time in 79 crates (of which 21 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) addchain version
96K 1 ff_derive ^0.2
23K 2 rescue_poseidon ^0.2
1 ff_derive_wasm_unknown_unknown ^0.2