MiniPx vs Topaz Photo AI — Free, Fast & Private
Topaz Photo AI is software you install and it does its heavy work on your own machine. That is worth saying plainly at the top, because MiniPx usually argues from privacy and against Topaz that argument does not hold. Topaz downloads its models once and runs them locally on macOS or Windows, with RAW support and plugins into Lightroom and Photoshop. Our free tools also run on your device — but the four Pro Cloud HD tools, the ones people compare with Topaz, run on our GPU. On the specific axis of "does my photograph leave this computer", a local desktop application wins against a server, and pretending otherwise would be dishonest.
What you trade for that
Local processing means local hardware, and an install. Topaz wants a reasonably modern GPU to be pleasant; on a thin laptop or an office machine that forbids installs, it is either slow or unavailable. MiniPx is a URL. The free layer runs in the browser on whatever you have, and when a job needs a heavier model than the machine in front of you can carry, Cloud HD borrows ours for four to five minutes rather than asking you to buy a graphics card. That is the actual trade: hardware and an install on one side, a metered server and an internet connection on the other.
Which jobs overlap, and which do not
The overlap is sharpening, denoising and enlarging; everything either side of that differs. Topaz has no equivalent to a browser toolbox — compression to a target size, format conversion, PDF work, favicons, EXIF stripping. MiniPx has no equivalent to RAW development or a Lightroom plugin. Where they meet: our AI photo enhancer cleans blur, noise and faded colour at the original dimensions, our image upscaler enlarges either on your device or four times on a Cloud HD pass with HAT-L, and photo restoration runs RestoreFormer++ on faces in old prints. Topaz covers similar territory with its own models and no per-photo counter.
Cost shape, not cost level
One is a piece of software you own a version of; the other is a subscription with an allowance. MiniPx Pro is $3.24/month or $29/year on the launch promo ($4.99 and $39 at list, excluding tax), which includes 150 Cloud HD runs a month with 10 of them HD, resetting on the first in UTC with no rollover. There is no cancel button by design: you email contact@minipx.com and a person handles it, and the paid period is honoured to its end. We do not publish Topaz's pricing here — check their site, since it changes and a stale number on our page would be worse than no number.
Two honest recommendations
Photographers with a machine and a library should look at Topaz first. If you shoot RAW, work inside Lightroom, process dozens of frames per session and own hardware that can carry the models, an installed local tool is simply the right architecture — no upload, no queue, no monthly counter. MiniPx suits the other case: occasional photographs, a locked-down or low-powered machine, a phone, or a job that is one part AI and three parts ordinary image work — resize it, convert it, get it under a size limit. Try the free image compressor and the on-device upscaler before you decide whether the Pro tier adds anything for you.
If you do use Cloud HD, here is the deal
One photo, one run, and a written retention window. A Cloud HD photo is uploaded for that single run, processed in the United States on Cloudflare R2 storage and Modal GPUs, encrypted in transit, and deleted when the run finishes, and in all cases within 24 hours. It is never used to train anything, the interface names the model that ran, and the switch is off until you turn it on. Everything else on MiniPx — including the image converter and the crop tool — runs in your browser and uploads nothing at all. That is a narrower promise than a blanket one about every tool on the site, and it is the true one.
Compare also
Related comparisons: MiniPx vs Let's Enhance, MiniPx vs VanceAI, MiniPx vs ImageOptim.