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Qsynth vs Decent Sampler: catalog facts
Qsynth	Decent Sampler
Free Free and open source under the GPL version 2 or later.	Free Free to download; an email address is requested before the download.
Linux	Windows, macOS, Linux, iOS
Graphical control of FluidSynth Plays MIDI through SoundFont 2 files	Free on Windows, macOS, Linux and iOS Works as VST, VST3, AU and AAX plugin or standalone
Linux focused Requires FluidSynth to be installed	Only plays instruments in the Decent Sampler format Download requires entering an email address
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0-or-later	License: Proprietary
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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