In 2012, I created Jedi—a Python auto-completion library that eventually reached millions of users and billions of downloads. But as the ecosystem evolved, one limitation became clear: speed. Jedi’s architecture couldn’t deliver the performance needed for large-scale projects.
In 2020, I started over—with everything I’d learned—building ZubanLS from the ground up in Rust. After five years of full-time work, ZubanLS is now the first truly fast Python language server.
ZubanLS is built for professionals who need precision, reliability and speed. It addresses long-standing issues in tools like Mypy and Pyright by focusing on performance without compromising features. Support for Django, go-to-definition, completions, and other LSP features is underway. The goal: a tool for perfectionists with deadlines.
The initial 2025 release may not meet every need. If something essential is missing for your use case, feel free to reach out—we’re open to implementing features based on real-world demand.