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Fission vs Tenacity: catalog facts
Fission	Tenacity
Paid Paid app with a free download to try it before purchase.	Free Free and open source under the GPL, developed by volunteers.
macOS	Windows, macOS, Linux
Lossless cutting and trimming of MP3 and AAC Batch conversion between common formats	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
macOS only Not a multitrack or effects-heavy editor	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
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.