Best AI Image Annotation Tools in 2026
Updated
In short: Label Studio is ranked #1 of 24 as of 8 October 2026, ahead of MakeSense.ai and COCO Annotator. The best-ranked option with a free plan is MakeSense.ai. The lowest first paid tier on this page is CVAT at $1.92/mo.
Labeling images can involve drawing regions, assigning categories, and reviewing annotations before they are used elsewhere. Compare AI-assisted labeling and annotation types, then consider API access and deployment options in light of your workflow. Export formats and review workflow describe how labeled work can move through a project; free-plan availability and paid-from pricing add cost context. Label Studio, COCO Annotator, and Roboflow are among the entries to compare against the kinds of images and review steps you handle. The listed criteria can help you assess whether a tool’s annotation capabilities and setup suit your needs.
24 AI image annotation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 24 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 |
|---|---|---|---|---|---|---|---|
| 1 | Label StudioWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $99/mo | 6.6 | |
| 2 | MakeSense.aiWeb · Windows · Mac · Linux · Self-hosted | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | COCO AnnotatorWeb · Windows · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 4 | RoboflowWeb · Android · iPhone · Self-hosted · API | Three bars | — | 3 of 6 | $39/mo | 6.5 | |
| 5 | Amazon SageMaker AutopilotWeb · API | Two bars | — | 1 of 6 | — | 6.4 | |
| 6 | CVATWeb · Self-hosted · API | Two bars | — | 1 of 6 | $1.92/mo | 6.4 | |
| 7 | SuperviselyWeb · Self-hosted · API | Two bars | — | 1 of 6 | €199/mo | 6.4 | |
| 8 | PixanoWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.7 |
| 9 | LabelMeWeb · Windows · Linux · Self-hosted | Two bars | — | — | 3 of 6 | — | 5.6 |
| 10 | YoloLabelWindows · Mac · Linux · Self-hosted · API | Two bars | — | — | 3 of 6 | — | 5.6 |
| 11 | LabelboxWeb · API | One bar | — | — | 1 of 6 | — | 5.5 |
| 12 | BasicAIWeb · Self-hosted · API | One bar | — | — | 1 of 6 | $550/mo | 5.4 |
| 13 | Guanex AI Annotation PlatformSelf-hosted | One bar | — | — | 0 of 6 | — | 5.4 |
| 14 | V7 DarwinWeb · API | One bar | — | — | 1 of 6 | — | 5.4 |
| 15 | ProdigyWeb · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.3 |
| 16 | DataloopWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 17 | Scale RapidWeb · API | No signal | — | — | 1 of 6 | — | 5.2 |
| 18 | SuperAnnotateWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 19 | VGG Image AnnotatorWeb · Windows · Mac · Linux | Two bars | — | 4 of 6 | Free | 5.1 | |
| 20 | Kili TechnologyWeb · Self-hosted · API | One bar | — | — | 1 of 6 | — | 5.0 |
| 21 | EncordWeb · Self-hosted · API | No signal | — | — | 1 of 6 | — | 4.7 |
| 22 | KeylabsWeb | No signal | — | — | 1 of 6 | — | 4.7 |
| 23 | RectLabelMac | No signal | — | — | 1 of 6 | — | 4.7 |
| 24 | Segments.aiWeb · API | One bar | — | 1 of 6 | Free | 4.7 |
Compare all 24 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Annotation types | AI-assisted labeling |
|---|---|---|---|---|---|---|---|---|
| 1 | Label Studio | 6.6 | Free plan | $99/mo | Yes | — | rectangles, ellipses, keypoints, polygons, brush masks, image classification | — |
| 2 | MakeSense.ai | 6.6 | Free plan | Free | Yes | — | point, line, rectangle, polygon, label | — |
| 3 | COCO Annotator | 6.5 | Free plan | Free | Yes | — | bounding boxes, polygons, segmentation masks, keypoints, points | Yes |
| 4 | Roboflow | 6.5 | Free plan | $39/mo | Yes | — | bounding boxes, polygons, segmentation masks, classification labels, keypoints | — |
| 5 | Amazon SageMaker Autopilot | 6.4 | No | — | No | — | — | — |
| 6 | CVAT | 6.4 | Free plan | $1.92/mo | Yes | 23 /user/mo | Rectangle/bounding box, polygon, polyline, points, ellipse, cuboid, skeleton, tag, brush/mask | — |
| 7 | Supervisely | 6.4 | Free plan | €199/mo | Yes | — | rectangle, line/polyline, polygon, multipolygon, point, bitmap mask, graph/keypoints, alpha mask, 2D cuboid | — |
| 8 | Pixano | 5.7 | No | — | Yes | — | bounding boxes, polygons, pixel masks, keypoints, cuboids, classification, tracking | — |
| 9 | LabelMe | 5.6 | No | — | Yes | — | polygon, scribble, mask | No |
| 10 | YoloLabel | 5.6 | No | — | Yes | — | bounding boxes | Yes |
| 11 | Labelbox | 5.5 | No | — | Yes | — | bounding boxes, segmentation masks, image classification, radio classification | — |
| 12 | BasicAI | 5.4 | No | $550/mo | Yes | 9 /user/mo | object detection, object tracking, bounding boxes, polygons, polylines, keypoints, classification, semantic segmentation, instance segmentation, panorama segmentation | — |
| 13 | Guanex AI Annotation Platform | 5.4 | No | — | — | — | classification, object detection, segmentation, multi-object tracking | Yes |
| 14 | V7 Darwin | 5.4 | No | — | Yes | — | Polygon; bounding box; tag; skeleton; keypoint; line; ellipse; mask; attributes; text; directional vector; instance ID | — |
| 15 | Prodigy | 5.3 | No | — | No | — | bounding boxes, polygons, image segments, image classification | Yes |
| 16 | Dataloop | 5.2 | No | — | — | — | bounding boxes, polygons, key points, cuboids, polylines, semantic segmentation, classification, tagging, hierarchical annotation | — |
| 17 | Scale Rapid | 5.2 | No | — | — | — | bounding box, polygon, line, cuboid, ellipse, point | — |
| 18 | SuperAnnotate | 5.2 | No | — | — | — | classification, key-point, bounding box, polygon, polyline, tiled imagery, cuboid, skeleton | — |
| 19 | VGG Image Annotator | 5.1 | Free plan | Free | Yes | — | rectangle, circle, ellipse, point, polygon, polyline | — |
| 20 | Kili Technology | 5.0 | No | — | No | — | bounding boxes, polygons, semantic segmentation, pose estimation, named entity recognition, classification | — |
| 21 | Encord | 4.7 | No | — | No | — | bounding boxes, rotatable bounding boxes, polygons, bitmasks, polylines, keypoints, primitives, classifications | — |
| 22 | Keylabs | 4.7 | No | — | No | — | Bounding box, polygon, polylines, keypoints, semantic segmentation, instance segmentation, rotating bounding box, skeletal, cuboid, mesh, 3D point cloud, bitmask, custom annotation | — |
| 23 | RectLabel | 4.7 | No | — | No | — | boxes, rotated boxes, polygons, cubic Bézier curves, lines, points, pixels, keypoints, image labels | — |
| 24 | Segments.ai | 4.7 | Free plan | Free | No | — | segmentation, bounding box, polygon, polyline, keypoint, cuboid | — |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which AI image annotation tool is ranked first on Freedom251?
Label Studio is ranked #1 of 24 with a score of 6.6. MakeSense.ai is second and COCO Annotator third.
How many of these have a free plan?
8 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 free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.