secp256k1-sys is used at run time in 1,700 crates (of which 529 optionally). It is a direct run-time dependency in 4 crates. It's used only as a dev dependency in 32 crates.

Number of dependers secp256k1-sys version Downloads/month
107 0.10.0 79K
486 0.9.2 253K
438 0.8.1 201K
43 0.7.0 1.1K
375 0.6.1 64K
54 0.5.2 21K
175 0.4.2 29K
19 0.3.0 1.1K
35 0.1.2 2.0K
Depender (with downloads and own rev deps) secp256k1-sys version
662K 357 secp256k1 ^0.10.0
9.7K 1 secp256k1-zkp-sys ^0.10.0
190 1 koibumi-secp256k1 ^0.10.0
180 5 dlc ^0.8.1