Open source async projects
Every project in the registry tagged async, ranked by real GitHub adoption.
FastAPI framework, high performance, easy to learn, fast to code, ready for production
🧰 The Rust SQL Toolkit. An async, pure Rust SQL crate featuring compile-time checked queries without a DSL. Supports PostgreSQL, MySQL, and SQLite.
📌 a missing Java std lib(simple & 0-dependency) for framework/middleware, provide an enhanced InheritableThreadLocal that transmits values between threads even
Blazing-fast API gateway with linear scalability
Notion API client SDK, rewritten in Python! (sync + async)
Rythe is a data-oriented C++20 game engine built to make optimal use of modern hardware.
Frequently asked questions
How many open source async projects are there?
This registry tracks 6 projects tagged async, with 133,587 GitHub stars between them. The most-adopted is fastapi at 102,402 stars.
Are these async projects free to use?
Yes — 6 of the 6 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which async project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these async projects still maintained?
5 of the 6 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.