Open-source alternatives to Massive

Massive is made by Native Instruments. These project covers similar ground for free. Each one does part of the job, so check the notes on its page.

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Surge XT

GPL-3.0Active

A hybrid synthesizer that mixes wavetable, FM, subtractive and modular-style routing, with a deep effects section and thousands of patches. One of the most complete free synths around.

Formats

VST3
CLAP
AU
LV2
Standalone

Works on

Windows
macOS
Linux

Stars4.1k

UpdatedNov 2, 2026

Instead of

Serum

Massive

Browse the category

Synthesizers16

Also replacing

Serum
Sylenth1
FM8
Chromaphone