Alphapython · pyqt6 · open source

Code in Python.
Not in bloat.

Antimatter is a modern, lightweight and absurdly optimized Python IDE. No telemetry, no popups, just a fast editor built around the way Python developers actually work.

Download View it on GitHub

Windows installer · Linux: build from source

01 / The problem

Your IDE shouldn’t need a loading bar.

Popular IDEs grew into corporate platforms: heavy, slow to start, packed with features you never open and prompts you never asked for. For a simple Python script, that is a lot of machine to move.

Typical IDE

Slow startup, gigabytes of RAM, constant popups, telemetry, a settings maze, and plugins to fix the plugins.

Antimatter

Opens instantly, stays out of your way, shows issues only when you ask, and keeps everything on your machine.

02 / Features

Built for the common Python workflow

Everything you need to write, run and ship a script, and nothing you don't.

Edit and run

Custom code viewer with syntax highlighting that loads large scripts in seconds.

Build templates

Compile projects with PyInstaller or Nuitka through reusable build templates.

Issues on demand

Pyflakes-powered problem finding that only appears when you want it.

Integrated terminal and Git

Live terminal, file manager, tabs, and Git clone, commit and push.

Private by design

No telemetry, ever. Free and open source.

Discord Rich Presence

Show what you are working on, if you feel like it.

03 / Screenshots

Clean. Quiet. Fast.

A clean, distraction-free interface.

Screen recording: Antimatter in action

Code in Python.Not in bloat.