pip-tools vs setuptools

pip-tools is a free set of command-line tools for keeping pinned pip-based packages current and making builds more predictable. Its two core commands are pip-compile and pip-sync. pip-compile generates requirements.txt files from pyproject.toml, setup.cfg, setup.py, or requirements.in, and can handle project and optional dependencies in pyproject.toml. It can also generate hashes for pip hash-checking mode. pip-sync installs, upgrades, or removes packages to make a virtual environment match a compiled requirements.txt file. Defaults can be configured in .pip-tools.toml or pyproject.toml, and pip-compile can be used as a pre-commit hook. The tools support Linux, macOS, and Windows, and the package requires Python 3.9 or later. Compilation results may differ across operating systems, Python versions, and implementations, so the project advises compiling separately for each target environment. The default backtracking resolver is described as more robust but generally slower; the legacy resolver is deprecated. pip-tools is distributed under the BSD License.

setuptools is a free Python packaging library for preparing projects for sharing and installation. It can serve as a project build backend, discover packages and namespaces, and let maintainers control which packages are distributed. It handles build-system requirements plus required and optional dependencies, including version limits and environment markers, and supports dependency groups. Configured entry points can generate console-command and plugin scripts during installation. Editable installs apply source changes without rebuilding and reinstalling. The library can build C and C++ extension modules, and its documentation covers workflows with pip, build, and PyPI. Setuptools runs on Linux, macOS, and Windows, while the current PyPI listing requires Python 3.10 or later. The project identifies modern PyPA-standard APIs and documented customization APIs as its most stable interfaces. It is free, has no free trial, and professional support is available through a Tidelift Subscription.