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Surge XT vs OB-Xf: catalog facts
Surge XT	OB-Xf
Free Free and open source.	Free Free open source plugin maintained by the Surge Synth Team.
Windows, macOS, Linux	Windows, macOS, Linux
Many synthesis methods, filters and effects MPE and microtuning support	VST3, CLAP, AU and LV2 formats Builds for Windows, macOS and Linux, including ARM Linux
Large feature set takes time to learn	Needs a compatible plugin host or DAW Recommends 8 GB of RAM or more
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	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.