Optimage is the closest competitor on price — $15 vs $2.99. Both stay simple. Kompressor is 5× cheaper and looks like a 2026 app, not a 2018 one.
Verdict
Optimage and Kompressor share a philosophy: do compression well, stay out of the way. Optimage has been around longer and adds GIF-to-MP4 conversion. Kompressor is fresher (2026 native design, TWK Continental typography), 5× cheaper, and matches Optimage on the core compression job. If you already own Optimage and it works, stay. If you're picking now, pick Kompressor.
| Feature | Kompressor | Optimage |
|---|---|---|
| Price | $2.99 one-time | $15 one-time |
| Free tier | 10 images / day | 24 images / day |
| Platform | macOS 11+ (Universal) | macOS native |
| Output formats | JPEG, PNG, WebP | JPEG, PNG, SVG, GIF, APNG, WebP |
| GIF to MP4 / WebM | No | Yes |
| Resize | 5 presets + original | Yes |
| HEIC conversion | Reads HEIC, no convert | HEIC → JPG / WebP |
| Privacy | 100% local | 100% local |
| Folder monitoring | No | No |
| Apple Shortcuts | No | No |
| UI era | 2026 native | ~2018 minimalist |
Optimage and Kompressor agree on the most important thing: compression should be simple, fast, and out of the way. They diverge on price. Optimage is $15 — fair, especially compared to $19.99+ alternatives. Kompressor is $2.99 — the cheapest paid native Mac compressor in 2026. For identical quality on JPEG, PNG and WebP output, the 5× gap is hard to justify in Optimage's favour.
Optimage's interface is minimal and works, but feels like a 2018 utility — system fonts, simple panels, basic controls. Kompressor uses TWK Continental, a 2026 macOS native design language with subtle gradient accents on the progress bar and a coloured quality badge that updates as you drag the slider. Same minimalist philosophy, fresher execution. For a tool you'll open daily, the design difference matters more than it sounds.
Kompressor's quality slider shows a live coloured badge (green "very good" at 75, vivid green "excellent" at 90+, amber "ok" at 50, red "low" below 40) as you drag. It's a small thing, but it teaches you intuitively where the good zones are without having to read documentation. Optimage shows a numerical setting; Kompressor shows numerical + visual.
Kompressor ships as a 6 MB universal binary that runs natively on Apple Silicon and Intel. Optimage is also native and reasonably small. Kompressor edges ahead on binary size and is built in Rust for parallel batch performance.
Optimage converts GIFs to MP4 and WebM video — useful for replacing heavy GIFs on websites with much smaller modern video formats. A 5 MB GIF often becomes a 300 KB MP4. Kompressor does not do this. If you regularly convert GIFs to video, Optimage is the right pick.
Optimage explicitly supports converting iPhone HEIC photos to JPEG or WebP — useful since many older systems and email clients still don't render HEIC well. Kompressor reads HEIC but does not currently convert it; HEIC files are flagged as needing manual conversion first. (This is on the roadmap for late 2026.)
Optimage outputs six formats including SVG, GIF, and APNG. Kompressor outputs three (JPEG, PNG, WebP). For users regularly working with vector icons or animated PNGs, Optimage covers more ground.
Optimage's free tier of 24 images per day is more generous than Kompressor's 10 per day. For some casual users, that's enough to never need to pay. Kompressor's smaller tier nudges purchase decisions sooner — a design choice, not a flaw, but worth noting.
Optimage is $15 one-time. Kompressor Pro is $2.99 one-time for one Mac, Team is $9.99 for five Macs. Both are permanent purchases — no subscription, free updates.
Solo user: Kompressor saves $12. Five-Mac team: Kompressor Team at $9.99 saves $65 versus buying Optimage five times ($75). Neither price will change your life. The decision should come down to which app you'd rather open in the morning, and which feature set matches your work. For fresh design and lowest cost, Kompressor. For GIF-to-MP4 and HEIC conversion baked in, Optimage.
You want the cheapest paid Mac compressor with a fresh 2026 UI.
You like the coloured quality badge and visible slider over numerical-only settings.
You only need JPEG, PNG, WebP output (which covers the bulk of web and email work).
You regularly convert GIFs to MP4 / WebM for the web.
You handle a lot of iPhone HEIC photos and need them converted to JPG / WebP.
You need SVG, GIF, or APNG output that Kompressor doesn't have.
10 images every day, no email, no card. See if the fresh UI is worth the swap.
macOS 11+ · 6 MB universal binary · refundable within 14 days
Yes. Optimage is $15 one-time. Kompressor Pro is $2.99 one-time. The 5× ratio holds, both are one-time payments with free updates.
Optimage converts GIF to MP4 / WebM and supports APNG output. It also has slightly stronger perceptual compression in some edge cases. Otherwise the feature sets overlap heavily.
Kompressor — by a clear margin. Optimage's interface is functional but feels older (closer to 2018). Kompressor uses a 2026 native macOS design language with TWK Continental typography.
No. Optimage outputs JPEG, PNG, SVG, GIF, APNG, WebP — no AVIF or JPEG-XL. Kompressor outputs JPEG, PNG, WebP — also no AVIF or JPEG-XL in 2026.
If you bought Optimage and like it, no urgent reason to switch. If you're choosing between them now, Kompressor is fresher, cheaper, and equally minimalist.