Best AI Image Annotation Tools in 2026
Updated
In short: Roboflow is ranked #1 of 24 as of 4 October 2026, ahead of CVAT and Amazon SageMaker Autopilot. The best-ranked option with a free plan is CVAT. The lowest first paid tier on this page is CVAT at $1.92/mo.
AI image annotation tools help teams label visual data, with different options for annotation work, review, and export. Roboflow leads the ranking, followed by CVAT and BasicAI. Compare annotation types and AI-assisted labeling to see how entries address labeling tasks. Review workflow, export formats, and API access add practical points to weigh, while deployment options may affect how a tool fits your setup. Free-plan availability and paid-from pricing bring cost into the comparison. Consider the labeling tasks and review process you need, then weigh them against the listed capabilities.
24 AI image annotation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Roboflow iPhone + Android RecognisedPhone appDocumentedFree plan 7.8$39/mo Annotation types: bounding boxes, polygons, segmentation masks, classification labels, keypoints
- 2 CVAT No phone app RecognisedPhone appDocumentedFree plan 6.4$1.92/mo Annotation types: Rectangle/bounding box, polygon, polyline, points, ellipse, cuboid, skeleton, tag, brush/mask
- 3 Amazon SageMaker Autopilot No phone app RecognisedPhone appDocumentedFree plan 6.3 Review workflow: Yes
- 4 COCO Annotator No phone app RecognisedPhone appDocumentedFree plan 6.3Free Annotation types: bounding boxes, polygons, segmentation masks, keypoints, pointsAI-assisted labeling: Yes
- 5 Label Studio No phone app RecognisedPhone appDocumentedFree plan 6.3$99/mo Annotation types: rectangles, ellipses, keypoints, polygons, brush masks, image classification
- 6 Supervisely No phone app RecognisedPhone appDocumentedFree plan 6.3€199/mo Annotation types: rectangle, line/polyline, polygon, multipolygon, point, bitmap mask, graph/keypoints, alpha mask, 2D cuboid
- 7 Labelbox No phone app RecognisedPhone appDocumentedFree plan 5.9 Annotation types: bounding boxes, segmentation masks, image classification, radio classification
- 8 Pixano No phone app RecognisedPhone appDocumentedFree plan 5.8 Annotation types: bounding boxes, polygons, pixel masks, keypoints, cuboids, classification, tracking
- 9 YoloLabel No phone app RecognisedPhone appDocumentedFree plan 5.8 Annotation types: bounding boxesAI-assisted labeling: YesReview workflow: Yes
- 10 BasicAI No phone app RecognisedPhone appDocumentedFree plan 5.7$550/mo Annotation types: object detection, object tracking, bounding boxes, polygons, polylines, keypoints, classification, semantic segmentation, instance segmentation, panorama segmentation
- 11 Prodigy No phone app RecognisedPhone appDocumentedFree plan 5.6 Annotation types: bounding boxes, polygons, image segments, image classificationAI-assisted labeling: YesReview workflow: Yes
- 12 LabelMe No phone app RecognisedPhone appDocumentedFree plan 5.4 Annotation types: polygon, scribble, maskAI-assisted labeling: No
- 13 Guanex AI Annotation Platform No phone app RecognisedPhone appDocumentedFree plan 5.3 Annotation types: classification, object detection, segmentation, multi-object trackingAI-assisted labeling: YesReview workflow: Yes
- 14 Scale Rapid No phone app RecognisedPhone appDocumentedFree plan 5.3 Annotation types: bounding box, polygon, line, cuboid, ellipse, pointReview workflow: Yes
- 15 V7 Darwin No phone app RecognisedPhone appDocumentedFree plan 5.3 Annotation types: Polygon; bounding box; tag; skeleton; keypoint; line; ellipse; mask; attributes; text; directional vector; instance ID
- 16 Dataloop No phone app RecognisedPhone appDocumentedFree plan 5.2 Annotation types: bounding boxes, polygons, key points, cuboids, polylines, semantic segmentation, classification, tagging, hierarchical annotation
- 17 MakeSense.ai No phone app RecognisedPhone appDocumentedFree plan 5.2 Annotation types: point, line, rectangle, polygon, label
- 18 SuperAnnotate No phone app RecognisedPhone appDocumentedFree plan 5.2 Annotation types: classification, key-point, bounding box, polygon, polyline, tiled imagery, cuboid, skeleton
- 19 VGG Image Annotator No phone app RecognisedPhone appDocumentedFree plan 5.1 Annotation types: rectangle, circle, ellipse, point, polygon, polyline
- 20 Kili Technology No phone app RecognisedPhone appDocumentedFree plan 5.0 Annotation types: bounding boxes, polygons, semantic segmentation, pose estimation, named entity recognition, classification
- 21 RectLabel No phone app RecognisedPhone appDocumentedFree plan 5.0 Annotation types: boxes, rotated boxes, polygons, cubic Bézier curves, lines, points, pixels, keypoints, image labels
- 22 Segments.ai No phone app RecognisedPhone appDocumentedFree plan 5.0 Annotation types: segmentation, bounding box, polygon, polyline, keypoint, cuboid
- 23 Encord No phone app RecognisedPhone appDocumentedFree plan 4.9 Annotation types: bounding boxes, rotatable bounding boxes, polygons, bitmasks, polylines, keypoints, primitives, classifications
- 24 Keylabs No phone app RecognisedPhone appDocumentedFree plan 4.9 Annotation types: Bounding box, polygon, polylines, keypoints, semantic segmentation, instance segmentation, rotating bounding box, skeletal, cuboid, mesh, 3D point cloud, bitmask, custom annotation
Is your app 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 Samsung Mobile US Press?
Roboflow is ranked #1 of 24 with a score of 7.8. CVAT is second and Amazon SageMaker Autopilot third.
How many of these have a free plan?
5 of the 24 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 mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.