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Rain vs rTorrent: catalog facts
Rain	rTorrent
Free Free and open source.	Free Free and open source; the developer accepts donations.
macOS, Linux, Command line	Linux, Command line
Designed to handle many torrents in one process Runs as a daemon on headless servers	Low resource use and high performance Runs on headless servers over SSH
No graphical interface Aimed at server use rather than casual desktop downloading	Steep learning curve and terse configuration No graphical interface of its own
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account 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 September 23, 2026

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