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Tenacity vs iZotope RX: catalog facts
Tenacity	iZotope RX
Free Free and open source under the GPL, developed by volunteers.	Paid Commercial software sold in several editions.
Windows, macOS, Linux	Windows, macOS
No telemetry, no account, and nothing that requires an internet connection Records from real and virtual devices and imports or exports a wide range of formats through FFmpeg	Noise removal and dialogue isolation for spoken audio Available as plugins for use inside other audio software
Development is slow and it trails current Audacity on features Releases are infrequent and built by a small volunteer team	Paid, with the full toolset in the higher editions Aimed at professionals rather than casual users
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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