uv

Overview

uv is a Python package and project manager from Astral, aimed at developers who want to handle dependencies, environments, Python versions, scripts, and command-line tools in one place. Its breadth and stated speed make it a strong candidate for consolidating a Python toolchain, provided its interface differences and credential-storage trade-off suit your workflow.

The documentation describes uv as 10–100x faster than pip; that is a stated comparison, not a promise for every project. Its pip-compatible interface also does not reproduce every command or behavior of the tools it can replace, so switching may involve adapting existing workflows.

Browse our Python Package Managers and Package Managers directories for more options.

Key features

Projects and dependencies

uv resolves dependencies and manages project environments, lockfiles, and workspaces. It supports source distributions, wheels, requirements.txt, and pylock.toml, as well as private registry authentication and offline installation. That combination suits Python projects that need repeatable environments or must install packages without a live connection.

Its default first-index strategy limits package candidates to the first index where a package is found, helping reduce dependency-confusion risk. Credentials are kept out of uv.lock, and uv can handle them through environment variables, URLs, netrc, or keyring. The security caveat is storage: credentials currently go in a plaintext file. Native system secret storage is only an experimental preview feature.

Python versions, scripts, and tools

uv can install, list, pin, and uninstall Python versions, and run scripts with dependencies. It can also run or install command-line tools distributed as Python packages. Developers who otherwise reach for separate utilities for these jobs may value the consolidation; those with established tool-specific workflows should account for uv’s imperfect interface compatibility.

Integrations and installation

Official guides cover Docker, Jupyter, GitHub Actions, GitLab CI/CD, Pre-commit, PyTorch, FastAPI, Bazel, and package registries. uv is written in Rust and uses rustls with aws-lc-rs for TLS, with bundled Mozilla root certificates by default. Installation options include a standalone installer, PyPI, Homebrew, MacPorts, WinGet, Scoop, Docker, GitHub Releases, and Cargo. On platforms without a prebuilt PyPI wheel, installing from source requires a Rust toolchain.

Pricing

uv is free: its open-source Python package and project manager costs nothing. There is no free trial, paid tier, or seat or usage cap stated. For individual developers and teams able to manage their own setup, there is no cheaper plan that gives up features; the trade-off is choosing uv itself rather than a paid service tier.

Platforms

uv supports Linux, macOS, and Windows, along with CPython, PyPy, Pyodide, and GraalPy. The PyPI route may require a Rust toolchain where a prebuilt wheel is unavailable, so that installation method is less convenient in such environments.

Who it's for

uv is best suited to Python developers who want a single tool for package and project management, Python-version handling, scripts, and command-line utilities. Its lockfile, workspace, private-registry, and offline-installation support also makes it relevant to projects with repeatability or network constraints. Teams that depend on exact pip or other tool behavior, or that require native secret storage rather than plaintext credentials, have reason to look elsewhere or assess the preview feature carefully.

Pros and cons

• Pros: Broad Python workflow coverage can replace several separate tools, including dependency, environment, version, and command-line utility managers.
• Pros: Lockfiles, workspaces, dependency resolution, private registry authentication, and offline installation support controlled project workflows.
• Pros: The first-index default is designed to help limit dependency-confusion risk.
• Cons: The pip-compatible interface differs in commands and behavior, which can complicate drop-in replacement.
• Cons: Credentials are currently stored in plaintext; native system secret storage remains experimental.
• Cons: Building from source through PyPI can require a Rust toolchain on systems without a prebuilt wheel.

Alternatives

For another free Python package manager, consider Yarn, an open-source package manager with no paid plans or usage limits stated. Choose it when you want that alternative rather than uv’s Python-specific project and version-management scope.

npm is a freemium option with a free plan for public package authors, including unlimited public packages, public publishing, and public registry access. It fits readers focused on public package publishing and registry use.

Gradle is a free, open-source build system; choose it when build-system functionality is the priority. Cargo is a free Rust package manager and build tool, better suited to Rust projects. Composer provides free PHP dependency management under the MIT license, making it the relevant choice for PHP.

Pixi offers free package-hosting plans with global CDN access, public packages, and channel users; consider it when those hosting provisions are the deciding factor. Nix is a free open-source package manager and an alternative for readers seeking that approach. Hex offers a free open-source option for public packages; it is a fit when public package registry features are the priority.

Verdict

Choose uv if you want broad Python package and project management in one free tool, with support for lockfiles, multiple Python implementations, scripts, and offline installation. Its main advantages are scope and the maker’s stated speed; look elsewhere if exact compatibility with existing commands or non-plaintext credential storage is essential.