Nix vs Rebar3
| Nix | Rebar3 | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | Windows, macOS, Linux |
| Free plan | Yes | — |
| Package formats | Nix expressions, derivations, flakes | Hex packages; Git sources; Mercurial sources; local path dependencies |
| Supported platforms | Linux, macOS, Windows through WSL2 | Erlang/OTP environments; documented compatibility includes OTP 26–28 for Rebar3 3.25.1 |
| Dependency resolution | Yes | Yes |
| Lockfile support | Yes | Yes |
| Workspace support | Yes | Yes |
| Offline installation | Yes | Yes |
| Private registry auth | — | Yes |
Both are listed in Best Package Managers. On Specifiction, Nix scores higher on our published basis.