Stellaris Companion is an open-source desktop app for macOS, Windows, and Linux.
Download
Use the download section for the recommended installer, or open the latest GitHub release to choose an asset directly.
Open the app
- macOS: open the downloaded disk image and drag Stellaris Companion to Applications.
- Windows: run the installer. If SmartScreen appears, verify the publisher context and source before continuing.
- Linux: use the package supplied in the latest release.
The app may need permission to read the folder where Stellaris stores save games. It does not need your Paradox account password.
Continue
Open Stellaris Companion. First launch offers an optional Gemini setup; you can enter a key or skip it and configure another model later. Continue to choose an AI provider.