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Rain vs Transmission: catalog facts
Rain	Transmission
Free Free and open source.	Free Free and open source, volunteer-run; no paid tier, no advertising.
macOS, Linux, Command line	Windows, macOS, Linux, Command line, Self-hosted
Designed to handle many torrents in one process Runs as a daemon on headless servers	Native builds for macOS, Linux and BSD, Windows, plus a daemon for servers and routers Web interface for remote control of any of the above
No graphical interface Aimed at server use rather than casual desktop downloading	Fewer built-in extras than qBittorrent: no integrated search engine The Windows build is the least mature of the platforms
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: GPL-2.0-or-later
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 20, 2026

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