Best FREE VST Synths of 2025

Honestly this might be the GOATED list of Free VST synths. And NO this is not full of partial ware, but the real deal.

What’s up chat,

IDK why I’ve never done this list. I guess because these have been a few of my little ‘cheat codes’.

Don’t let GAS ruin your productions. You don’t need the latest plugin or whatnot, more than likely you’re paying lots of money for new presets.

Most of the free synths can do the same thing as the paid ones, the major difference might be ease of use, featureset and/or sound.

IF you’re like me and want good stuff that you can make better stuff with then this list is for you.

Here is a list of my favorite FREE ‘analog’ sounding or just good soft synths I use as unique sound modules.

U-he : TyrellN6

Pros:
Cons:

U-he or Urs Heckman is one of the best companies and an underdog in the virtual synth talk if you ask me. I’ve been inspired by their sounds right out of the box.

There is something about the weight of the tones that come from TyrellN6 that makes me put this at the top of my list.

Honestly, this is one of the ones I scratch my head at a bit because the tones sound SOOO good.

Now, I do like to think of this as an ‘unfriendly’ synth. Its up in your face, and its got some serious bite. And i’m saying that even with the fader peaking at -12dB. And while I believe the presets sound great, I think its one of the plguins that you use when you’re looking for the ‘thing’.

RIght off the bat is great for song starters or adding lead melody sounds. I love the ability to save favorite presets easily and even have them grouped and color coded.

Another featureset that i’m super fond of is the “Assign Recent” function and the drag and drop modulation assignmets. Its something that makes modulating extremely easy and is a great place to learn synthesis for beginners like myself.

All in all I would say is a great synth and you can probably use it for everything, however the next on the list has been a force to contend with for years.

TaL N01zE M4K3R

Pros:
Cons:

N01zE m4K3R IMHO is the complete opposite of TyrellN6.

Touting itself as a virtual Analog Synthesizer, I would say this is GREAT virtual synthesizer but analog it is NOT.

Well if in ‘analog’ you mean that by tweaking one knob you’ll create a sound that you feel you’ll never be able to re-produce then ‘yes’. And that is one of the more rewarding things about this synth.

nevermind the fact that its digital feel can help to add frequency and energy to tracks without muddying up too much, it really shine in the ability to create unique tones fast and shorten the learning curve of synthesis.

For leads I think you’ll find enough to keep you busy and experimenting, but if you want bass sounds or midrange arps, then you’re gonna have to go a little ‘esoteric’

The Usual Suspects : OSIRUS

Pros:
Cons:

Pretty much everything from The Usual Suspects is going to teeter on some legal blurred lines.

Essentially what this company is doing is emulating old chips, similar to Nintendo emulators. NOthing wrong with an emulator right? It just re-creates the characteristics of the original hardware.

SO this synth is an emulation of the DSP56300 Chip found in some of the Virtual Analog synths like the Access VIrus A, B, C, TI, or the Nord Lead 2, just to name a few.

I really really like the sound of this synth, but maybe not the CPU it takes up.

However, its best to pay for this with a little bit of CPU because its a truly powerful free synth.

Offering it as freeware, The Usual Suspects have created a pretty good re-creation of the VIRUS A-C line. Here’s a comparison between the two sounds.

Since the VIRUS series of synthesizers is discontinued, you can feel comfortable knowing you’re in legal territory.

If you’ve purchased any soundsets for the virus (assuming that you’ve had the synth) these ROM’s will also read on the OSIRUS.

For beginners, it may be a little cumbersome creating patches, however its definitely worth it. The ability to stack patches means you can create some pretty unique sounds.

pretty cool for a synth resurrected from the dead right?

or is it?

Vember Audio/Surge XT

Pros:
Cons:

Im SOOO happy this ‘vintage’ wavetable synth has been revived.

Surge (formerly by Vember Audio) now by Surge Synth Team is a pretty impressive deep synth.

This was actually one of the first synths I used, where I understood the modulation routing.

Essentially, you click a modulator, then click its destination. Thats it. pretty straightforward, well, at least 15 years ago when this synth was still for sale.

Eventually, like Rob Papen Abino, these synths would eventually die and we’d pray that the latest version of our operating system wouldn’t render them completely inoperable.

Along with easy modulation routing, the FX routing reminded me of keyboard workstation fx routing. Confusing AF to look at but inviting to experiment with.

The new Surge XT version has a few new presets and improvements that are pretty good. one of my favorite added features is the help dialog which takes you right to the web reference that explains how the parameter works.

So yes, i love the virtually endless modulation opportunities with twelve independent LFO’s , but what I truly love about this is the integration with the open sourced AIRwindows plugins. These are some of the better sounding plugins on the market and they have NO GUI!

The premise behind them is that no-one can see your screen so the GUI doesn’t matter, what really matters is the sound. Since Surge XT has more effects slots, you can create a great fx chain before it hits the fader. And that includes, old-school sampler emulation, vinyl emulation, compression, reverb, flanger etc.. VERY versitie and sounds amazing.

Surge is also one of the first synth plugins I used that had audio in. Not only can you route audio in from the DAW, but you can actually route the audio from one scene to another inside of the synth.

IF you’re looking for some ‘cheesey’ not run of the mill sounds, this is a great module. I personally run my chords through here and am always impressed with what comes out.

And speaking of plugins in which I’m always impressed at what comes out..

U-he: Zebralette

Pros:
Cons:

SPeaking of impressive stuff at first glance, Full transparency here,

back in 2012 or so , I DEFINITELY had a cracked version of Zebra2 and was instantly inspired by most of their sounds. BUT

Like our comrade Curtis King, I realized that I was ripping off the guy who spend hours and hours working on his passion. Plus, why even entertain that when they have such a phenomenal version of Zebra2 in Zebralette.

I’ve worked with a handful of analog synths, and while there is little comparison, there also is Zebralette.

Honestly it really does feel like a mini version of Zebra! (which you can also demo for free for what feels like an eternity AND comes with several great soundsets) I really understand why Hanz Zimmer almost exclusively used the synth on many of his compositions.

maintaining the same browsing architecture throughout all of their plugins its very familiar on the backside with essentially all of the features of TyrellN6, so you’ll feel right at home.

This is one of the more versatile synthesizers. From bowed sounds to realistic keys this is a fun sonic landscape to explore. Ive found that i’ enjoy playing the keys with this synh and discovering some interesting riffs that way.

The ‘needle drop’ method is a way I’ve approached music since my early days with a turntable. Essentially its where I just poke around with either chords or progressions OR presets and the random button on certain synths.

Its like river fishing, you’re not gonna catch anything good if you’re not by the river poking around.

One of the more amazing features that sets this synth apart is the MSEG or the Multi Stage Envelope Generator. Its a pretty complex modulator that they’ve placed as a main feature of this synth and for good reason.

you can actually browse different MSEGs presets and completly change the sound. So virtually for ever preset, you have a preset folder full of variatons. pretty amazing.

Zebralette is really fun to work with, while it only contains a fraction of zebras library, its enough to geet you creating something.

If you wan the full experience Zebra2 and ZebraHZ both have trial times that last long enough to lay down some good riffs and bounce them to audio 😉

kHs ONE

Pros:
Cons:

kHs One is an interesting synth.

its the most basic of basic.

The cheeseburger of steaks.

But ain’t no wrong with a lil cheeseburger!
This synth is really easy to use. It reads from left to right,

Your voices are on the left, amp modulation filter, additional distortion modulation delay, and finally ,your output. Under each section,you have the modulation matrix where parameters can be modulated.

And there’s nothing wrong with these tones, if anything, they are very ‘analog’ in their own way.

kHs One proves that you can get great sounds using only one or two voices, and simple effects like filter and distortion can really transform the sound for the listener.

A great place to learn synthesis and signal flow for beginners.

While distortion effects aren’t unique to VST synths, the distortion in kHs One is actually really pleasant and placed well in the signal flow.

its nice having a filter before and after the distortion to cut out any unwanted frequencies. This gives a lot of control over the tone, which can help emulate older analog synths. Although which one you might have a hard time pinpointing.

This reminds me of one of the stock devices found in FL studio. Very simple but incredibly powerful and focused on ease of use and sound quality.

The Usual Suspects : OSTIRUS

Pros:
Cons:

Honestly, i’m not sure why I still have this entry on the list. Dont get me wrong the Unofficial Open Source version of the Virus TI and TI Snow is nothing to snuff at, I just haven’t found my rhthm with the synth.

I believe this is a great example of manage your expectations. For years, I wanted the TI or the Snow as I felt the virus Sound would change my productions, but over the years I’ve found so many workarounds or other phenomenal synths and havne’t really the need.

Or perhaps I’ve been so impressed with some of the tried and true synths out there that this iteration of the Virus synth line isn’t the ‘best’.

Some of my favorite tones come out of the Unofficial Virus C emulation in OSIRIS.

BUT

WIth that said, this is still an amazing entry. Its the Virus TI.

What it think is more impressive is the atomizer function, it slices input audio up into small loops and maps the different times over the keyboard. Pretty cool function, I believe it was what pulled me to the synth to begin with.

So like Surge this is also a wavetable synth but it does lack the instant inspiration of the other synths.

Full Bucket : FB-3300

Pros:
Cons:

Now I’ve never used or even heard of a KORG PS-3300, but I can probably guarantee you one thing, this sounds nothing like it.

In comparison with the other synths on the board, this one is the flattest BUT..

I love that about it.

Even though it's flat when you pair the sonics with another sound with more body, the FB-3300 sounds can essentially go anywhere in the mix, and that's pretty cool.

But just like a synth from the 1970’s, you’re gonna be dancing around the interface turning knobs and experimenting with what comest out.

but what we do have time to do is browse through the presets and find something that fits the track.

And for the psychoacoustic effect that these reverbs and delays have on the track, it’s worth it.

But if you’re looking to add some more ‘analog’ flair to something digital, whether synth or sample, you’ve gotta route it through something that will impart some sort of character.

so ..

Here’s a simple way of making your digital synths like the FB-3300 sound even more analog and blow your mind with how much life you can breathe into a simple synth patch.

Here is my “analog” or mojo signal flow.

Yup, that's simple. Airwindows interstage>Channel 9>Instertage>mojo>Insterstage again.

Airwindows audiophiles will understand. Now, from time to time, I’ll use the NEVE emulation in Channel 9.

These are just harmonic distortion plugins with a subtle amount of filtering of high frequencies. And Mojo really does a lot.

I’ll do a little gainstaging with utility before the first plugin, -6dB to -12dB max.

And I’m always impressed at how the synths just GEL together.

Oh yeah

I learned this tip from Yoad Nevo, and I didn’t realize these were actual tones from his synths. But adding some noise to your synths actually helps them sound realistic.

I’ve found you want to keep the values conservative because they will muddy up your track, but a little wobble or mechanics will DEFINITELY make ANY synth on this list sound more realistic.

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SO there you have it!

My somewhat comprehensive list of my favorite free synthesizers that I ACTUALLY use.

And if you’ve got some “FREE” synthesizers that you use, i encourage you to explore some of these Excellent alternatives to other types of “Freeware”