Best Image Annotation Software in 2026
Updated
28 image annotation software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
28ranked
0free plans on this page
5 Oct 2026last checked
0 of the 3 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 26 | Kili TechnologyWeb | One bar | — | — | 1 of 6 | — | 4.8 |
| 27 | RectLabelMac | No signal | — | — | 1 of 6 | — | 4.8 |
| 28 | Segments.aiWeb | One bar | — | — | 1 of 6 | — | 4.8 |
Compare all 3 in a table
| # | App | Score | Free plan | Free plan | Paid from | Annotation types | Image formats |
|---|---|---|---|---|---|---|---|
| 26 | Kili Technology | 4.8 | No | No | — | bounding boxes, polygons, semantic segmentation, pose estimation, named entity recognition, classification | PNG, JPEG/JPG, GIF, BMP, WebP, ICO, JP2, NTF, TIFF/TIF, GeoTIFF |
| 27 | RectLabel | 4.8 | No | No | — | boxes, rotated boxes, polygons, cubic Bézier curves, lines, points, pixels, keypoints, image labels | — |
| 28 | Segments.ai | 4.8 | No | No | — | segmentation, bounding box, polygon, polyline, keypoint, cuboid | jpeg, png, bmp |
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