secp256k1-sys is used at run time in 726 crates (of which 205 optionally, 3 directly). It's used only as a dev dependency in 18 crates.

Number of dependers secp256k1-sys version Downloads/month
14 0.8.0 9.2K
25 0.7.0 14K
364 0.6.1 198K
77 0.5.2 20K
194 0.4.2 74K
1 0.4.1 3.0K
25 0.3.0 4.7K
44 0.1.2 6.9K
Depender (with downloads and own rev deps) secp256k1-sys version
369K 210 secp256k1 ^0.8.0
3.5K 1 secp256k1-zkp-sys ^0.6.0
3 dlc =0.4.1