Pixi vs uv

Pixi is a package management tool for developers building reproducible project environments. It creates isolated environments that can be recreated from built-in lock files, and includes a task runner for project tasks and pipelines. Pixi supports Python and other languages, plus pyproject.toml and PyPI through uv. It can install global tools into isolated environments. For robotics workflows, it offers ROS 2 support through RoboStack for cross-platform development. Documented integrations cover VS Code, JetBrains, Zed, RStudio, JupyterLab, GitHub Actions, and Direnv. The VS Code Python extension can detect Pixi environments; a community-maintained Pixi extension adds task exploration and dependency management. Pixi runs on Linux, macOS, and Windows, with installation options including Homebrew, Windows Installer, Winget, Scoop, GitHub releases, and source installation. The software is free. Separate prefix.dev package-hosting plans include a free option and Pro at €42 a month, billed €500 annually; Enterprise hosting is available by quote. Enterprise builds can restrict allowed channels, proxy settings, certificates, and other policy-sensitive configuration.

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.