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rTorrent vs Rain: catalog facts
rTorrent	Rain
Free Free and open source; the developer accepts donations.	Free Free and open source.
Linux, Command line	macOS, Linux, Command line
Low resource use and high performance Runs on headless servers over SSH	Designed to handle many torrents in one process Runs as a daemon on headless servers
Steep learning curve and terse configuration No graphical interface of its own	No graphical interface Aimed at server use rather than casual desktop downloading
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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 September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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