Vital is the one to install first: a modern wavetable synth whose free tier is the complete instrument, not a demo. Surge XT is deeper and is free with nothing held back. Dexed gives you FM synthesis and the sound of the DX7. And if you are on a Mac, you already own Alchemy. By the end of this page you will have one of them installed and know which control to turn first.

Tiers and licences move. Every figure here was checked on 18 September 2026 against the developer’s own site.

The short answer

Install Vital. Add Surge XT when you want more synthesis than Vital has, and Dexed when you want FM. All three run on Windows, macOS and Linux, and all three come from the developer’s own page: vital.audio, surge-synthesizer.github.io and the Dexed releases page on GitHub. Nothing on this page needs a download from anywhere else.

Vital goes first because it shows you what it is doing. Every modulation animates on the knob it is moving, and the oscilloscope and spectrum draw the sound as you play it. For a first synth, that matters more than the spec sheet.

Producers on Reddit land in the same place. When producers were asked for the best free synth VST in January 2024, the top reply, at 76 points, was one word: “Vital”. “I love Surge XT” sits at 19, level with the reminder that “even the synths built into your DAW will probably surprise you with what they can achieve.” One reply sums up the thread: “Surge and Vital cover most of what you would ever need a synth to do and rival many expensive paid plugins in terms of features. Dexed will have you covered for all your FM needs.” The recurring runners-up across that thread and a July 2025 thread are Synth1, TAL Noisemaker, Odin 2, u-he’s Tyrell N6 and Zebralette, and Cardinal for modular.

Vital: start here

Vital is “a spectral warping wavetable synthesizer”, as its press kit puts it, released by Matt Tytel on 24 November 2020. Three wavetable oscillators, a sampler oscillator and two filters, per Bedroom Producers Blog’s June 2026 comparison, with envelopes and LFOs you drag onto any control. The spectral part is what makes it unusual: instead of only scanning through a wavetable, you can stretch, shift and smear its harmonics.

The free tier is the whole synth. Vital’s site lists Basic as “the full synth with all features” with 75 presets and 25 wavetables. Plus, at $25, raises that to 250 presets and 70 wavetables. Pro, at $80, gives 400+ presets, 150 wavetables and unlimited text-to-wavetable, which Free and Plus cap at five requests a day. A $5-a-month subscription adds store credit and subscriber packs. The engine is identical on all four. The formats are VST, VST3, AU and LV2, on Windows 10 or later, macOS 10.15 or later, and Ubuntu 18.04 or later.

BPB’s Tomislav Zlatic, comparing it with Surge XT in June 2026: “Vital shows you what is happening,” and “This is why I still think Vital is the better first synth for beginners.” KVR’s readers voted it Favorite Free Instrument in 2021, 2023, 2024 and 2025.

Where it stops: the free preset library is small. PluginDrop’s May 2026 review calls it “functional as a demonstration of the engine’s capability, but not a self-sufficient library for producers who use presets as workflow starting points.” Vital’s interface is drawn on the GPU, and its system requirements say OpenGL 3 or higher and 64-bit only, so an older machine can fail to run it at all. There is no arpeggiator; ModeAudio’s guide to turning a Vital preset into an arp does it with an LFO on the pitch, and for anything more than that you use your DAW’s. What Is an Arpeggiator covers what you are looking for. You download it from vital.audio.

Surge XT: the deepest one, with nothing withheld

Surge XT is a hybrid synth. Its core is subtractive, and its 12 oscillator algorithms cover classic and modern virtual analog, wavetable, window, sine, two kinds of FM, a plucked string, and audio input. Each patch has two scenes, each scene three oscillators, two filters in eight routings, and 12 LFOs, six per voice and six global. Its site lists 16 effect slots with 27 algorithms, over 2,800 patches and over 700 wavetables.

It began as a commercial product. Claes Johanson wrote and sold it as Surge at Vember Audio, then in September 2018 released a partly finished Surge 1.6 under GPL3, and a volunteer team has developed it since. The current release is 1.3.4, from 11 August 2024, and nightly builds continue; the one on the site is dated 17 September 2026. Formats are VST3, AU, CLAP and LV2, on Windows 7 or later, macOS 10.11 or later as a universal binary, and Linux on x64 and ARM.

MusicRadar’s free-synth series called it “arguably the most powerful synthesiser that we have looked at in this series of articles” and found it “frankly staggering to find such comprehensive features in a free software synth.”

Where it stops: density. Zlatic: “Surge XT is packed, both in terms of specs and visually,” and “it doesn’t show you modulation the way Vital does.” The upside of the same design is load: “Surge XT tends to be the lighter choice in practice.” Another reply says much the same of Vital, “be prepared for some menu diving and a learning curve”, so the difference between the two is one of degree. Like Vital, it has no arpeggiator. A request for one has been open on the project’s GitHub since January 2021 and sits on the Surge XT 2.0 milestone.

Dexed: FM synthesis and the DX7, free

Dexed is “closely modeled on the Yamaha DX7”, in its README’s words, and is “also a midi cartridge librarian/manager for the DX7.” It loads any DX7 or TX7 sysex file, so forty years of patches work in it, from the factory cartridges to the community-compiled collection linked from its own site, and it exposes all 144 DX7 parameters in one panel for automation.

Three engines: Modern, at 24-bit, is the default; Mark I, at 10-bit, is the closest to the original hardware; OPL Series, at 8-bit, is experimental. Version 1.0.1 shipped on 29 November 2025 under GPL v3, as VST, VST3, AU, CLAP and a standalone app.

It stops where the DX7 stops. Six operators feeding each other are harder to hear your way through than an oscillator into a filter, and an FM knob changes the timbre in a way its name does not predict. Learn subtractive first, then come back for this.

What you already own

If you are on a Mac, you have Alchemy, and Apple never quite tells you so. GarageBand is free on macOS Monterey or later. Apple’s GarageBand page promises “100 EDM- and Hip Hop–inspired synth sounds” and says “every synth features the Transform Pad Smart Control.” The GarageBand user guide describes them as “a set of patches that use a powerful synthesizer engine” and never names it. CDM’s Peter Kirn did, when Alchemy joined Logic in August 2015: “Even in GarageBand, you can access Alchemy-based presets.” Alchemy was Camel Audio’s product until Apple bought the company. When a Logic user asked in December 2025 whether to add Pigments, Surge XT or Vital, two of the replies were to stay put: “No need to clutter your workspace. You already have it. Works fine,” and “Just take a bit of time learning Alchemy BEFORE you look elsewhere.”

In GarageBand you get the sounds and the Transform Pad, eight snapshots you morph between. The editor behind them is in Logic Pro, $199.99, where Apple’s guide calls Alchemy “an easy-to-use, yet powerful sample manipulation synthesizer” with “additive, spectral, and granular synthesis and resynthesis, sampling, and virtual analog engines,” up to four sources per preset, and three filters per source plus two more on the output.

The same holds on every platform: your DAW ships with at least one synth. Open it before you install anything. If you came here from How to Make Beats on GarageBand, the synth under those patches is the one above.

What “free” actually means on each of these

Vital is free to use, permanently. PluginDrop: “Vital Free is a permanent free tier with no expiration,” with no watermark and no export limit. The engine’s source code is on GitHub under GPLv3, but the README is precise about what that does not include: the presets “are under a separate license that does not allow redistribution,” and a build from source cannot use the Vital name. What you pay for is the content.

Surge XT is free in every sense. The FAQ: “Surge XT is free and open source software released under GPL3.” That covers the code, the 2,800 patches and the 700 wavetables. Nobody sells a Surge XT Pro. What you do not get is a support desk; help is the manual and the project’s Discord.

Dexed is the same: GPL v3, all of it.

Alchemy is not free. It is bundled with a free app on Mac, with the editor held back for a $199.99 one.

Which one to learn on

Vital. Its layout is the standard one, oscillator into filter, envelopes and LFOs alongside, and every connection you make is drawn on screen while it runs. Turn a knob in Vital and you can see what changed, which is most of the work of learning to hear it.

One caution, from Michael Musco’s February 2026 review: “The depth of routing and spectral warping can overwhelm beginners without foundational synthesis understanding.” Learn what an oscillator, a filter and an envelope do before you touch the spectral controls. Then Surge XT, because once Vital’s screen makes sense, Surge’s is the same thing with more of it. Then Dexed, when you want to know why the 1980s sounded like that.

Common questions

Is Vital still free?

Yes. As of 18 September 2026, Vital’s Basic tier is “the full synth with all features” with 75 presets and 25 wavetables. The paid tiers only add presets, wavetables and text-to-wavetable requests.

What is the best synthesizer VST?

There is no single answer, and the paid contenders are priced high enough to defer the question. Serum 2 is $249 from Xfer Records. Omnisphere 3 is $499 from Spectrasonics. Install Vital first; if you run out of synth, you will know exactly which of those you need.

What are some good free VST instrument plugins?

Beyond synths, Bedroom Producers Blog’s May 2026 list of the five free plugins it would install for a beginner names Decent Sampler and Kontakt Player as the samplers, alongside Vital, a reverb and an EQ. Its advice is to stop there: “One synth you actually understand is more useful than five you don’t.”

Is there a free alternative to Omnisphere?

Not a direct one. Omnisphere 3 is a synth on top of a large sample library, 18 libraries in the factory set, and no free plugin ships anything like that. The nearest free combination is Surge XT for the synthesis, with its 2,800 patches, and Decent Sampler for the samples.

What to do once it is installed

Do not open a preset. Open the init patch, play a note, and turn the filter cutoff while the spectrum is drawing. Then put an envelope on the cutoff. Then an LFO. By the end of an hour you will have a bass, a pad and a lead, and you will know why each one sounds the way it does.

The cutoff, the envelope and the LFO do the same job in Vital, Surge XT and Alchemy, and in every synth you pay for later. Learn them by ear once and they come with you.

The Best Free Synth VSTs