Compare software

RetroArr vs Gaseous Server: catalog facts
RetroArr	Gaseous Server
Free Free and open source under the MIT licence.	Free Free and open source under the AGPL 3.0 license.
Self-hosted	Web, Self-hosted
Recognises files for more than 170 platforms Metadata from IGDB, ScreenScraper, Steam and GOG	Identifies ROMs and adds metadata from multiple sources Play games in the browser through the built-in emulator
Young project with a small user base IGDB metadata needs Twitch developer credentials	Needs a server to run Little documentation outside the repository
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.