Rebar3 vs uv
Rebar3
rebar3.org
uv
docs.astral.shSide by side
| Figure | Rebar3 | uv |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Package Managers | 8.4 (#25) | 8.9 (#4) |
| Dependency resolution | Yes | Yes |
| Intended users | The project recommends Rebar3 for systems whose main language is Erlang when users value repeatable builds and integrated tools. | Astral says it builds high-performance developer tools for the Python ecosystem to help developers ship software faster. |
| Lockfile support | Yes | Yes |
| Offline installation | Yes | Yes |
| Package formats | Hex packages; Git sources; Mercurial sources; local path dependencies | source distributions,wheels,requirements.txt,pylock.toml |
| Private registry auth | Yes | Yes |
| Purpose | Rebar3 helps create, develop, compile, test, and release Erlang libraries, applications, and systems. | uv is an extremely fast Python package and project manager written in Rust. |
| Supported platforms | Erlang/OTP environments; documented compatibility includes OTP 26–28 for Rebar3 3.25.1 | macOS,Linux,Windows,CPython,PyPy,Pyodide,GraalPy |
| Workspace support | Yes | Yes |
Plans
In their own words
uv
uv is a Python package and project manager for Linux, macOS, and Windows. Written in Rust, it manages dependencies and environments, with lockfiles and workspaces, and can install, list, pin, or uninstall Python versions. It also runs scripts with dependencies and runs or installs command-line tools from Python packages. Its pip-compatible interface is intended to cover work done by tools such as pip, pip-tools, pipx, poetry, pyenv, twine, and virtualenv, though its commands do not exactly match those tools. The documentation describes uv as 10–100x faster than pip. It supports source distributions, wheels, requirements.txt, and pylock.toml, as well as offline installation and private registry authentication. For package selection, its default first-index strategy limits candidates to the first index where a package is found. Credentials are not stored in uv.lock, but uv currently stores them in a plaintext file; native system secret storage is an experimental preview. The free plan is free.