opam vs pip
opam
opam.ocaml.orgpip
pip.pypa.ioSide by side
| Figure | opam | pip |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Plans published | 0 | 1 |
| Spec score · Package Managers | 7.6 (#63) | 8.8 (#7) |
| Dependency resolution | Yes | pip can determine and install package dependencies, and its resolver can backtrack when version choices are incompatible. |
| Free plan | Yes | Yes |
| Lockfile support | Yes | Yes |
| Offline installation | Yes | Yes |
| Package formats | opam package definition files and archives | sdist,wheel |
| Package sources | Packages can be pinned to a version, local path, archive, or Git, Mercurial, or Darcs repository. | pip looks at PyPI by default and can install packages from other Python package repositories. |
| Purpose | opam is a source-based package manager for OCaml. | pip is the package installer for Python and can install packages from PyPI and other indexes. |
| Support | Bug reports and feature requests go to opam's issue tracker; general queries can be addressed on the OCaml-platform mailing list. | The documentation directs users seeking help to GitHub Issues, the Discourse channel, and User IRC. |
| Supported platforms | Linux,macOS,FreeBSD,OpenBSD,NetBSD,Windows | The current pip version is supported on Windows, Linux, and macOS, and maintainers do not support other operating systems. |
Plans
In their own words
pip
pip installs Python packages from PyPI and other package indexes, as well as from version control URLs, local project directories, and source archives. It supports source distributions and wheels, resolves dependencies, and can install an environment specified in a requirements file. Its install command can produce a JSON report of installed packages. pip runs on Linux, macOS, and Windows, and the current version supports CPython 3.10 through 3.15 and the latest PyPy3. Other operating systems and Python versions are not supported by its maintainers. It is commonly included in virtual environments and Python downloads from python.org; ensurepip and get-pip.py are also installation options. An experimental standalone zip application is available, but its documentation advises against production use. pip is free. It does not collect telemetry, though it sends non-identifying details such as Python version and operating system to the remote indexes it accesses. Remote tampering checks are not enabled by default; hash-checking mode and binary-only installs are listed as more secure options.