Uv - review - 2026
uv is a high-performance package, virtual environment, and Python version manager developed by Astral Software and written in Rust. As of 2026, it has become one of the fastest-growing tools in the Python ecosystem, combining the functionality of pip, pipx, virtualenv, Poetry, and pyenv into a single binary.
History
The first public release of uv was in February 2024. By 2026, the tool has gone through several major releases, reaching production-grade stability. It was motivated by the desire to replace traditional Python tooling, which suffers from poor performance due to pure-Python implementation and ecosystem fragmentation.
Key Features
Python Version Management
uv can install and switch between Python versions (including CPython and PyPy):
uv python install 3.12 uv python install pypy@3.10 uv python pin 3.12
It automatically downloads and builds Python distributions, removing the need for pyenv.
Projects & Dependencies
uv supports the PEP 621 standard with pyproject.toml configuration:
uv init my-project uv add requests uv sync uv lock uv run main.py
The uv.lock file ensures reproducible environments, similar to Poetry or npm lock files.
Tool Management
A pipx replacement for running CLI applications in isolation:
uv tool install ruff uvx aider-chat uv tool list uv tool upgrade --all
Pip-Compatible Interface
For migration from pip, uv offers full compatibility mode:
uv pip install -r requirements.txt uv pip list --outdated uv pip compile pyproject.toml -o requirements.txt
Script Management
uv supports running Python scripts with inline dependencies (PEP 723):
# /// script
# dependencies = ["requests"]
# ///
import requests
print(requests.get('https://example.org'))
uv run script.py
Performance
Thanks to Rust implementation and efficient caching, uv is 10–100x faster than pip for package installation. Dependency resolution is an order of magnitude faster than Poetry. The cache is centralized and shared across projects, Python versions, and platforms.
Integrations
- Docker: official image at ghcr.io/astral-sh/uv with caching optimizations and multi-stage builds
- GitHub Actions: official astral-sh/setup-uv action
- GitLab CI/CD, Pre-commit, Renovate, Dependabot — native support
- Registries: PyPI, Azure Artifacts, Google Artifact Registry, AWS CodeArtifact, JFrog Artifactory
- Frameworks: FastAPI, PyTorch, Jupyter, marimo, Bazel, AWS Lambda, Coiled
Comparison
| Feature | uv | pip | pipx | virtualenv | Poetry | conda |
|---|---|---|---|---|---|---|
| Package installation | ✓ | ✓ | ✗ | ✗ | ✓ | ✓ |
| Virtual environments | ✓ | ✗ | ✗ | ✓ | ✓ | ✓ |
| Python version management | ✓ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Lock file | ✓ | ✗ | ✗ | ✗ | ✓ | ✓ |
| Run CLI without install | ✓ | ✗ | ✓ | ✗ | ✗ | ✗ |
| Inline script dependencies | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
| Cross-platform | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Performance | 10–100× faster than pip | — | — | — | ~10× slower than uv | — |
Installation
macOS (Homebrew)
brew install uv
Linux / macOS (standalone)
curl -LsSf https://astral.sh/uv/install.sh | sh
Windows
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"
Docker
FROM ghcr.io/astral-sh/uv:latest
Other methods
PyPI, pipx, Cargo (cargo install uv), WinGet, Scoop, MacPorts.
Ecosystem
uv is part of the Astral tool ecosystem, which also includes Ruff (Python linter and formatter). Both are commonly used together: Ruff for code quality, uv for dependency and environment management.
Summary
uv is a modern, extremely fast, and feature-rich Python environment management tool that, by 2026, has become the de facto standard for new projects. It replaces pip, pipx, virtualenv, pyenv, and partially Poetry with a unified interface and performance orders of magnitude ahead of traditional alternatives. Support for PEP 723 (inline script dependencies) and deep integration with major CI/CD systems and cloud registries make uv a universal solution for both local development and production environments.
Links
