Best AI Image Annotation Tools in 2026
Updated
In short: CVAT is ranked #1 of 23 as of 1 October 2026, ahead of Roboflow and BasicAI. The best-ranked option with a free plan is Roboflow. The lowest first paid tier on this page is CVAT at $1.92/mo.
23 AI image annotation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Annotation types | |
|---|---|---|---|---|---|---|---|---|
| 1 | CVAT | 9.0 | RecognisedAPIDocumented | $1.92/mo | Yes | 23 /user/mo | Rectangle/bounding box, polygon, polyline, points, ellipse, cuboid, skeleton, tag, brush/mask | View |
| 2 | Roboflow | 8.8 | RecognisedAPIDocumented | $39/mo | Yes | — | bounding boxes, polygons, segmentation masks, classification labels, keypoints | View |
| 3 | BasicAI | 8.7 | RecognisedAPIDocumented | $550/mo | Yes | 9 /user/mo | object detection, object tracking, bounding boxes, polygons, polylines, keypoints, classification, semantic segmentation, instance segmentation, panorama segmentation | View |
| 4 | Label Studio | 8.6 | RecognisedAPIDocumented | $99/mo | Yes | — | rectangles, ellipses, keypoints, polygons, brush masks, image classification | View |
| 5 |  Pixano | 7.9 | RecognisedAPIDocumented | — | Yes | — | bounding boxes, polygons, pixel masks, keypoints, cuboids, classification, tracking | View |
| 6 |  COCO Annotator | 7.8 | RecognisedAPIDocumented | Free | Yes | — | bounding boxes, polygons, segmentation masks, keypoints, points | View |
| 7 |  YoloLabel | 7.3 | RecognisedAPIDocumented | — | Yes | — | bounding boxes | View |
| 8 |  Prodigy | 7.2 | RecognisedAPIDocumented | — | No | — | bounding boxes, polygons, image segments, image classification | View |
| 9 |  Supervisely | 6.7 | RecognisedAPIDocumented | — | Yes | — | rectangle, line/polyline, polygon, multipolygon, point, bitmap mask, graph/keypoints, alpha mask, 2D cuboid | View |
| 10 | V7 Darwin | 6.3 | RecognisedAPIDocumented | — | Yes | — | Polygon; bounding box; tag; skeleton; keypoint; line; ellipse; mask; attributes; text; directional vector; instance ID | View |
| 11 | Dataloop | 6.2 | RecognisedAPIDocumented | — | — | — | bounding boxes, polygons, key points, cuboids, polylines, semantic segmentation, classification, tagging, hierarchical annotation | View |
| 12 | Labelbox | 6.2 | RecognisedAPIDocumented | — | Yes | — | bounding boxes, segmentation masks, image classification, radio classification | View |
| 13 | Encord | 5.9 | RecognisedAPIDocumented | — | No | — | bounding boxes, rotatable bounding boxes, polygons, bitmasks, polylines, keypoints, primitives, classifications | View |
| 14 | SuperAnnotate | 5.9 | RecognisedAPIDocumented | — | — | — | classification, key-point, bounding box, polygon, polyline, tiled imagery, cuboid, skeleton | View |
| 15 | Kili Technology | 5.8 | RecognisedAPIDocumented | — | No | — | bounding boxes, polygons, semantic segmentation, pose estimation, named entity recognition, classification | View |
| 16 | LabelMe | 5.7 | RecognisedAPIDocumented | — | Yes | — | polygon, scribble, mask | View |
| 17 |  MakeSense.ai | 5.6 | RecognisedAPIDocumented | — | Yes | — | point, line, rectangle, polygon, label | View |
| 18 |  Segments.ai | 5.5 | RecognisedAPIDocumented | — | No | — | segmentation, bounding box, polygon, polyline, keypoint, cuboid | View |
| 19 |  VGG Image Annotator | 5.3 | RecognisedAPIDocumented | — | Yes | — | rectangle, circle, ellipse, point, polygon, polyline | View |
| 20 |  Keylabs | 5.1 | RecognisedAPIDocumented | — | No | — | Bounding box, polygon, polylines, keypoints, semantic segmentation, instance segmentation, rotating bounding box, skeletal, cuboid, mesh, 3D point cloud, bitmask, custom annotation | View |
| 21 |  Guanex AI Annotation Platform | 4.9 | RecognisedAPIDocumented | — | — | — | classification, object detection, segmentation, multi-object tracking | View |
| 22 |  Scale Rapid | 4.8 | RecognisedAPIDocumented | — | — | — | bounding box, polygon, line, cuboid, ellipse, point | View |
| 23 |  RectLabel | 4.7 | RecognisedAPIDocumented | — | No | — | boxes, rotated boxes, polygons, cubic Bézier curves, lines, points, pixels, keypoints, image labels | View |
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI image annotation tool is ranked first on Inferse?
CVAT is ranked #1 of 23 with a score of 9.0. Roboflow is second and BasicAI third.
How many of these have a free plan?
4 of the 23 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, CVAT has the lowest first paid tier we found: $1.92/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.