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ZynAddSubFX vs FabFilter One: catalog facts
ZynAddSubFX	FabFilter One
Freemium Source code is free; the Zyn-Fusion binary release is pay what you want from $45.	Paid Paid plug-in with a 30-day trial.
Windows, macOS, Linux	Windows, macOS
Three synthesis engines including PAD synthesis Wide choice of filters and free-form envelopes	Warm self-oscillating filter Aliasing-free oscillator with pulse width modulation
Ready-made Zyn-Fusion binaries are paid Deep parameter set takes time to learn	Single oscillator design limits sound range Needs a host application such as a DAW
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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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