Best Free Crypto Mining Software in 2026 (GPU + CPU Miners Compared)

The good news: the best mining software is free. The catch is there's no single "best" — the right miner depends on your hardware, your coin's algorithm, and how much hassle you'll tolerate. Here's the honest lay of the land.

We build a miner ourselves, so we'll be straight with you, including about the competition: the established miners are excellent and more mature than ours. This guide explains what actually separates good mining software from bad, runs through the free options worth knowing, and shows where a free dual GPU+CPU miner fits in.

What makes mining software "good"

Ignore the flashy claims and judge on five things that genuinely matter:

• Supported algorithms. Your coin runs a specific algorithm — KawPow (Ravencoin and its forks), Etchash (Ethereum Classic), RandomX (Monero), and so on. The miner has to support it. That's the first filter.
• Supported hardware. NVIDIA, AMD, or CPU. Some miners do all three; some specialize. Match it to what you own.
• Dev fee. Nearly every miner takes a small built-in fee, usually around 1%, by briefly mining to the developer. About 1% is normal; far higher or hidden fees are a red flag.
• Stability and efficiency. A miner that's slightly faster but crashes every few hours earns less than a steady one, because uptime is everything. Hashrate per watt matters more than raw hashrate.
• Ease of setup. Some miners need hand-written config files; others run from a simple launch script. For beginners this is the difference between mining tonight and giving up.

The established free GPU miners

If you're mining on a graphics card, these are the well-known, free, mature options. They're closed-source, support a wide range of algorithms, and most work on both NVIDIA and AMD. They each take a small dev fee. We're not going to pretend they aren't good — they're the standard for a reason, and if you need broad AMD support or an algorithm we don't cover, they're the right call.

• lolMiner — broad algorithm support across NVIDIA and AMD; widely used for Etchash and many others.
• T-Rex — an NVIDIA-focused miner known for strong KawPow performance.
• NBMiner — another long-running multi-algorithm miner for NVIDIA and AMD.

All three are free to download. Whichever you pick, only download from the project's official source and expect your antivirus to flag any miner — that's common, but stick to well-known software.

The standard free CPU miner

For CPU mining of RandomX coins like Monero (XMR), XMRig is the open-source standard. It's mature, fast, and well-documented. If all you want is to mine Monero on a CPU, it's the obvious choice. The interesting question is what to do with your GPU at the same time — which is where dual mining comes in.

HydraX: a free dual GPU + CPU miner

Here's where we fit. HydraX is a free, actively-developed miner built around one idea most setups miss: your GPU and CPU can mine different coins at the same time. It mines a GPU coin — Ethereum Classic (Etchash) or Ravencoin, Neoxa, Neurai and Frencoin (KawPow) — while simultaneously mining Monero on your CPU (RandomX), all from a single program. Where it stands today:

• Free, with a 1% dev fee — the normal, transparent amount.
• Our own code and CUDA kernels — a cleanroom build, not a rebadged fork.
• No config files — edit a launch script with your wallet and run; nothing to hand-write.
• Dual GPU+CPU mining built in — one rig earns on two coins from one power bill.
• NVIDIA-only, open beta — this is the honest part: we don't yet support AMD, and we cover fewer algorithms than the veterans. AMD support is in progress.

So we're not claiming to beat the established miners on maturity or hardware breadth — they win there. Our pitch is simpler: if you run an NVIDIA card and want a free, no-fuss way to mine a GPU coin and Monero together, HydraX is built for exactly that.

Looking for a free lolMiner or T-Rex alternative?

People search for an "alternative" for a few reasons: they want a second miner to compare hashrate, they want simpler setup, or they specifically want the dual GPU+CPU approach. If that's you and you're on NVIDIA, HydraX is worth a look — it's free, it sets up in minutes with no config file, and the dual-mining is the part the single-purpose miners don't do out of the box. If you need AMD support or an algorithm we don't list, stick with the veterans; there's no shame in running whatever earns most for your rig.

How to actually choose

1. Start from your coin's algorithm. KawPow, Etchash, RandomX — this narrows the field immediately.
2. Filter by your hardware. NVIDIA, AMD or CPU. Don't fight a miner that doesn't target your card.
3. Check the dev fee and prefer something around 1% and transparent.
4. Test stability over a day, not a minute. Watch accepted shares and temperatures.
5. Run the numbers. Whatever miner you choose, profit comes down to hashrate, power draw and your electricity rate — check it in the profit calculator before you commit.

Frequently asked

Is free mining software safe? The reputable ones are, but mining software is a common disguise for malware, so only download from official sources and expect antivirus warnings on legitimate miners too. Verify before you run anything.

Why do free miners charge a dev fee? The download is free; a tiny dev fee (around 1%) funds ongoing development by mining to the developer for a few seconds per hour. It's standard and reasonable — just avoid miners that hide it or charge far more.

Can one program mine on my GPU and CPU at once? Yes — that's exactly what a dual GPU+CPU miner like HydraX does, running a GPU coin and Monero together. See our dual-mining guide for how it works.

Estimates only. Mining returns depend on volatile prices, rising difficulty, and your real costs. Not financial advice. Other product names are trademarks of their respective owners; comparisons are our own opinion.