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iZotope RX vs Tenacity: catalog facts
iZotope RX	Tenacity
Paid Commercial software sold in several editions.	Free Free and open source under the GPL, developed by volunteers.
Windows, macOS	Windows, macOS, Linux
Noise removal and dialogue isolation for spoken audio Available as plugins for use inside other audio software	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
Paid, with the full toolset in the higher editions Aimed at professionals rather than casual users	Development is slow and it trails current Audacity on features Releases are infrequent and built by a small volunteer team
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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