Performance-first approach using Rust; aims to simplify the fragmented Python toolchain (pip, poetry, pdm, flake8, etc.) into a single, cohesive, and fast experience.

Leadership

Founders

Charlie Marsh

Founder & CEO of Astral. Previously Staff Software Engineer at Spring Discovery (2018-2022) and Senior Engineer at Khan Academy (2014-2017). BSE in Computer Science from Princeton University.

Executive Team

Charlie Marsh

Founder & CEO

Previously Staff Software Engineer at Spring Discovery and Khan Academy.

Michael Katz

Head of Go-to-Market (GTM)

Joined Astral to lead commercial business; former Founder/CEO of Flowsend and experience at Qualtrics.

Board of Directors

Casey Aylward

Board Member / Investor (Accel)

Jennifer Li

Board Member / Investor (Andreessen Horowitz)

Founding Story

Charlie Marsh started Ruff as a personal project to test if Rust could significantly speed up Python linting. After it gained rapid adoption, he founded Astral to build a comprehensive suite of high-performance tools for Python.

Business Model

Revenue

Pre-revenue or undisclosed (acquired by OpenAI)

Revenue Model

Open source tools with plans for vertically integrated paid services (Cloud/Enterprise). Now acquired by OpenAI.

Pricing Tiers

Open Source

Free

All core tools (Ruff, uv, ty) are free and open-source.

Acquired by OpenAI (Mar 2026)

Target Markets

Industries & Segments

Python developers
Data scientists
Software engineering teams
DevOps engineers

Use Cases

Python development
CI/CD pipelines
Package management
Linting and formatting

Notable Customers

Amazon
Hugging Face
LangChain
Microsoft

Quick Facts

Headquarters

Brooklyn, NY

Founded

2023

Entity Type

Inc.

Employees

Total Funding

$4M+ (Seed plus unannounced A and B rounds)

Investors

Accel, Andreessen Horowitz

Office Locations

Brooklyn

Remote

Funding History

Seed$4,000,000

Apr 18, 2023

Accel

Series AUnannounced

Unknown

Accel

Series BUnannounced

Unknown

Andreessen Horowitz

History & Milestones

Mar 19, 2026

Acquisition by OpenAI to join the Codex team.

Dec 16, 2025

Release of ty, a high-performance Python type checker and language server.

Feb 15, 2024

Release of uv, an extremely fast Python package installer and resolver.

Aug 20, 2024

uv 0.3.0 major update, expanding into a unified Python project manager.

Apr 18, 2023

Public launch of Astral with $4M seed funding led by Accel.

Key Capabilities

Extreme performance (Rust-based)

Unified toolchain

Drop-in compatibility with legacy tools

Open-source core

Integrations & Partnerships

Platform Integrations

GitHub Actions
VS Code
PyCharm
Maturin
PyPI

Key Partnerships

OpenAI (Parent company)

Maintainers of major open-source projects

Connect

Website

astral.sh

GitHub

astral-sh

X / Twitter

astral_sh

AI Topics

Astral focuses on these topics:

Linters & Formatters(2)

Code Intelligence(2)

AI Coding Assistants(2)

Command Line Assistants(1)

Development Environments(1)

AI Development Libraries(1)

Back to all developers

Astral

Astral's mission is to make the Python ecosystem more productive by building high-performance developer tools, starting with Ruff and uv.

Visit Website

At a Glance

46Tool Views

Brooklyn, NYHeadquarters

2023Est.

20Employees

Command Line Assistants

Connect

AI Tools by Astral

(3)

ty

Python Type Checker in Rust

Code Intelligence Linters & Fmts AI Coding Asst.

uv

Python Package Manager in Rust

CLI Assistants Dev Environments AI Dev Libraries

Ruff

Python Linter and Formatter

Linters & Fmts Code Intelligence AI Coding Asst.

Discussions

No discussions yet

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Latest News

03/19/2026

Astral to join OpenAI

astral.sh

12/16/2025

Announcing ty: A fast Python type checker

astral.sh

10/15/2025

Astral OSS Fund: One Year Later

astral.sh

08/20/2024

uv: Unified Python packaging

astral.sh

Products & Services

Ruff

Aug 2022

An extremely fast Python linter and formatter, written in Rust. Designed as a drop-in replacement for Flake8, isort, and Black.

Feb 15, 2024

A high-performance Python package and project manager. Handles installation, resolution, project management, and Python version bootstrapping.

Dec 16, 2025

A high-performance Python type checker and language server, written in Rust, designed as a faster alternative to mypy and Pyright.

Rye

2023 (Takeover)

A Python project management tool originally created by Armin Ronacher, now maintained by Astral as part of their unified toolchain effort.

Market Position

Performance-first approach using Rust; aims to simplify the fragmented Python toolchain (pip, poetry, pdm, flake8, etc.) into a single, cohesive, and fast experience.

Leadership

Founders

Charlie Marsh

Founder & CEO of Astral. Previously Staff Software Engineer at Spring Discovery (2018-2022) and Senior Engineer at Khan Academy (2014-2017). BSE in Computer Science from Princeton University.

Executive Team

Charlie Marsh

Founder & CEO

Previously Staff Software Engineer at Spring Discovery and Khan Academy.

Michael Katz

Head of Go-to-Market (GTM)

Joined Astral to lead commercial business; former Founder/CEO of Flowsend and experience at Qualtrics.

Board of Directors

Casey Aylward

Board Member / Investor (Accel)

Jennifer Li

Board Member / Investor (Andreessen Horowitz)

Founding Story

Business Model

Revenue

Pre-revenue or undisclosed (acquired by OpenAI)

Revenue Model

Open source tools with plans for vertically integrated paid services (Cloud/Enterprise). Now acquired by OpenAI.

Pricing Tiers

Open Source

Free

All core tools (Ruff, uv, ty) are free and open-source.

Acquired by OpenAI (Mar 2026)

Target Markets

Industries & Segments

Python developers
Data scientists
Software engineering teams
DevOps engineers

Use Cases

Python development
CI/CD pipelines
Package management
Linting and formatting

Notable Customers

Amazon
Hugging Face
LangChain
Microsoft

Quick Facts

Headquarters

Brooklyn, NY

Founded

2023

Entity Type

Inc.

Employees

Total Funding

$4M+ (Seed plus unannounced A and B rounds)

Investors

Accel, Andreessen Horowitz

Office Locations

Brooklyn

Remote

Funding History

Seed$4,000,000

Apr 18, 2023

Accel

Series AUnannounced

Unknown

Accel

Series BUnannounced

Unknown

Andreessen Horowitz

History & Milestones

Mar 19, 2026

Acquisition by OpenAI to join the Codex team.

Dec 16, 2025

Release of ty, a high-performance Python type checker and language server.

Feb 15, 2024

Release of uv, an extremely fast Python package installer and resolver.

Aug 20, 2024

uv 0.3.0 major update, expanding into a unified Python project manager.

Apr 18, 2023

Public launch of Astral with $4M seed funding led by Accel.

Key Capabilities

Extreme performance (Rust-based)

Unified toolchain

Drop-in compatibility with legacy tools

Open-source core

Integrations & Partnerships

Platform Integrations

GitHub Actions
VS Code
PyCharm
Maturin
PyPI

Key Partnerships

OpenAI (Parent company)

Maintainers of major open-source projects

Connect

Website

astral.sh

GitHub

astral-sh

X / Twitter

astral_sh

AI Topics

Astral focuses on these topics:

Linters & Formatters(2)

Code Intelligence(2)

AI Coding Assistants(2)

Command Line Assistants(1)

Development Environments(1)

AI Development Libraries(1)

Back to all developers