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

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