The best free amp sims in 2026

I've recorded whole albums through a Kemper. It's a genuinely good way to work: the captures sound like the amps they came from, reamping is painless, and nobody listening to the finished record is going to ask what was in the room.

It's also expensive, and it's built around captures (its newer Liquid Profiling layers some modeled tone-shaping on top, but the heart of it is still profiling real amps rather than simulating circuits from scratch).

I've tried all the popular free sims too, and recorded plenty of them. Some of them sound great. You can make a free rig that holds up on a record, and this list is mostly about which ones do that best.

But I've never found a free amp sim that does more than one job well and also feels like a tube amp. Sounds like one, sometimes, absolutely. Feels like one is a different bar.

So this is the list I wish someone had handed me. Eight free amp sims that earn their disk space, what each is actually good at, and where I'd start if I were installing my first one tonight.

Fair warning about my bias: I'm building an amp sim. It's not on this list, and the last section explains why. Everything above that section is written the way I'd tell a friend at a rehearsal, because a list that quietly steers you toward my thing would be worth exactly nothing to you.

What "free" actually means here

Three different things wear the word.

Actually free. Download it, use it forever, no account, no nag screen. Ignite Amps and Blue Cat's Free Amp live here.

Free tier of a paid suite. Real, useful, and permanently free, but built as the front door to a store. AmpliTube Custom Shop and Guitar Rig Player are these. Nothing wrong with the model as long as you know you're standing in a lobby.

Free and open source. The code is public and the format is yours. Neural Amp Modeler is the big one, and it changed this whole category in a few years.

I've marked which is which below, because "free" doing three jobs is how people end up surprised.

1. Neural Amp Modeler

Free and open source. Windows and macOS officially, Linux through community ports.

NAM is the most important thing to happen to free amp sims in a decade, and it isn't close.

The idea: instead of modeling an amp's circuit, you record what the amp does. Feed a known signal in, record what comes out, train a small neural network on the pair. What you get is a capture, a file that sounds startlingly like the rig it was taken from. Then thousands of people did this to their rigs and gave the files away.

That last part is the actual innovation. The tone library is enormous, free, and community-owned. You can spend a weekend playing through amps you'll never afford and never see.

Where it shines: raw sound-alike quality on a specific rig at a specific setting. If someone captured a good amp well, the capture is convincing in a way that embarrasses a lot of paid modeling from just a few years ago.

The catch: a capture is a photograph. It's taken at the knob positions somebody else had set when they recorded it, through the tubes they happened to have in the amp that day. NAM's plugin gives you tone controls afterward, but those sit downstream of the capture rather than being the amp's own knobs re-solving. Turn the gain down on a cranked capture and you get a quieter cranked capture.

Every capture-based tool has this one-accurate-setting ceiling, my Kemper included. It's what a capture is, and it's worth understanding before you build a rig on top of one. You're playing someone else's decisions: their knob positions, their tubes, their room, their good day.

This ceiling belongs to captures specifically. Most of the other entries on this list are modeled amps — somebody wrote code that behaves like an amp's parts — and their knobs work properly. They run into a different wall, and it shows up a few entries down.

Kemper and NAM both do a really excellent job at applying generically what rolling the gain knob back should do to an amp, but they CAN'T respond the same way a real amp does. The gain knob on a high gain metal amp and the gain knob on a classic British amp are very different things.

That's a completely fine trade for a lot of music. It's the wrong trade if what you actually wanted was the amp.

2. Ignite Amps (Emissary, TPA-1, NadIR)

Actually free, donationware. Windows, macOS.

Two Italian engineers who also build real tube amps, giving away plugins that outclass things people charge money for. Emissary is a full dual-channel amp with a serious high-gain lead side, TPA-1 is a tube power amp you pair with a preamp, and NadIR is a zero-latency IR loader a lot of people (me included) reach for first.

If you play anything heavy and you install exactly one thing off this list, install Emissary. I've used it a lot and it can be genuinely great.

Where it shines: high gain that stays tight and musical once you pair it with a good IR, and a cab loader that doesn't fight you.

The catch: the interfaces look like 2013, and the range is deliberately narrow. These are a few very good amps rather than a suite.

And the honest note from my own ears: at its best, it still doesn't feel like playing through a tube amp. Two engineers are giving away excellent work for free here, and none of that is a knock on them.

This is the other ceiling, and it's the one modeled amps hit: the catalog ceiling. Emissary's knobs are real knobs and they interact the way an amp's do — that's the whole advantage a model has over a capture. It goes further than most free plugins, too: flip it around and you can pick the power tubes and set the bias. But every one of those is a choice Ignite built for you. You get Emissary, as far as Emissary goes. You can't rearrange its tone stack or add a stage they didn't model. Every modeled sim on this list has a lid on it, and the lid is where somebody else stopped.

3. AmpliTube 5 Custom Shop

Free tier of a paid suite. Windows, macOS.

The free tier of IK's big suite gives you a working rig: a handful of amps, cabs, stomps, and the full signal-chain builder. It's genuinely playable and it's the tier most people's first amp sim experience runs through.

Where it shines: breadth of the system. You learn how amp, cab, mic placement, and pedals stack, which is knowledge that transfers everywhere else.

The catch: the store is the point. Expect to be sold to, and expect the good stuff to be behind a purchase. IK runs frequent sales and promotions, so if a steady stream of discount emails grates on you, know it going in.

4. Guitar Rig 7 Player

Free tier of a paid suite. Windows, macOS.

Native Instruments' free tier: two amps (a boutique-American clean and a British-style crunch), a small set of effects, and the same rack the paid version uses.

Where it shines: the effects rack, honestly, more than the amp. It's a clean, stable, well-built piece of software from a company that isn't going anywhere, and the free tier is a real tool rather than a demo.

The catch: two amps. You'll outgrow the amp side faster than the others here, though the effects rack keeps earning its place long after.

5. Amped Roots Free

Actually free (registration required). Windows, macOS.

ML Sound Lab's free cut-down of a paid modern-metal plugin (built with Ryan "Fluff" Bruce). Amp, cab section, noise gate, all in one window with almost nothing to configure.

Where it shines: speed. Load it, pick a preset, play. For a scratch track or a riff you need to capture before you lose it, less setup is a real feature.

The catch: narrow by design, and you register to get it.

6. Blue Cat's Free Amp

Actually free. Windows, macOS, and it ranks well for a reason.

Three amp models, cab sim, and Blue Cat's usual attention to plugin engineering. It sits near the top of the free-amp-sim search results and mostly deserves it.

Where it shines: it behaves. Low CPU, no drama, works in every host, and the company has been quietly shipping good audio software for over two decades.

The catch: the models are competent rather than exciting.

7. LiveSPICE

Free and open source. Windows only.

Different animal entirely, and I'd feel dishonest leaving it off.

LiveSPICE simulates the actual circuit in real time. You draw a schematic, and it solves the electronics while you play through it. The circuit itself, running.

It proved years ago that you could do this on a normal computer in real time. It's an extraordinary piece of work and it's free to study, which is rarer than it sounds.

Where it shines: it's the only thing on this list where changing a part changes the sound the way changing a part changes the sound.

The catch: it's Windows-only, built on a UI stack (WPF) that appears to genuinely pin it there, and its last real release was Preview 15 back in early 2024, with only a build-maintenance commit since. It also asks you to know what a schematic is. This is a tool for the curious rather than a plug-and-play rig.

It's also the one entry here that ducks both ceilings. Solve the circuit instead of playing back a recording and the one-accurate-setting ceiling goes away; let the user draw the schematic and the catalog ceiling goes with it. That it's one Windows-only project maintained by one person is the state of this corner of the field, not a knock on the project.

8. Free impulse responses (the fizz tax)

Actually free. Everywhere.

A cab thing rather than an amp thing, and the highest-leverage free download in the category.

An impulse response is a snapshot of a speaker cabinet in a room with a mic on it. Swapping the IR under any amp above changes the sound more than swapping the amp does. Most people chasing "my tone sounds fizzy" are paying the fizz tax: blaming the amp for something the cab is doing.

Grab a free IR pack, load it in NadIR or your amp sim's own loader, and spend an hour on it. It's the cheapest large improvement available.

For a GREAT example, check out God's Cab by Wilkinson Audio.

The short version

Where I'd start: NAM plus a free IR pack, and Emissary if you play heavy. That's a rig most people would have paid four figures for in 2010, and it costs a download.

What I'm building, and why it isn't on this list

I'm building Cathode. It isn't on this list because you can't download it, and a list of free amp sims you can't download would be an advertisement wearing a costume.

The reason I started is personal, not commercial. I wanted to learn how a tube amp actually works — the designing-one-yourself depth — without keeping a live high-voltage chassis on a bench in a house full of kids. The only software that promised that was LiveSPICE: one option, Windows-only, quiet for years. That was the whole market.

So Cathode plays amps as live circuits. Turn the tone knob and the whole amp re-solves, the way it does on a real amp where tone and volume argue over the same signal. That's the one-accurate-setting ceiling, gone, and the knobs are the amp's own.

The catalog ceiling goes too, and that part matters more to me. A Cathode amp is a design rather than a product somebody shipped: an open file you can read, change, and build from. The shelf isn't a fixed list of amps somebody chose for you — it's whatever the community invents, including amps nobody has built and a few nobody could.

It comes in two pieces. Cathode Player is free and plays any amp the community designs. Cathode Designer is where you open one up and change the parts, down to the component. Pricing is one page with no asterisks on it.

I'm going to skip the accuracy fight entirely. A good capture of a real amp is very hard to beat on pure sound-alike, and picking that argument would be picking one I deserve to lose. What a live circuit gives you instead is aliveness and control: roll the volume back going into a verse and the amp cleans up the way the real thing does, rather than just getting quieter.

Will it feel like a tube amp? I genuinely don't know yet. What I do know is that it's simulating the real circuit, which gives it a better shot than a recording of one ever gets.

Here's the part I'm actually building toward, and I want to be clear it's a direction rather than a feature list. Every amp is a file you can read, share, and change. You find a mod you've always wanted to hear, you hand the mod and the amp file to something like ChatGPT, and it hands you back the modded amp. You load it and play it. No soldering iron, no second-hand chassis, no wondering whether you'd have wrecked a mint amp to find out.

Paid tools do some of this beautifully. To my ears UAD makes some of the best-sounding amp software there is. You're still limited to the amps they chose to make, and the ones nobody has made yet stay unmade. That's the catalog ceiling, and spending more money doesn't lift it.

None of this is downloadable. Everything I've actually finished is on the status board: what's built, what's in progress, and what's planned. When there's something to download, the email list hears first.

In the meantime, go install Emissary. It's free, it's excellent, and it'll get you further than most things you can buy.

When it's ready to play, Cathode Player will be free too.