FiftyOne vs Kili Technology

FiftyOne8.6Visit Kili Technology7.9Visit

Higher score FiftyOne #5 in Image Annotation Software 8.6/10 Open source ✓ 3 of 3 features Visit FiftyOne

vs

Kili Technology #12 in Image Annotation Software 7.9/10 Pricing on request · 14-day trial Free trial✓ 3 of 3 features Try Kili Technology

• FiftyOne fits best

  ML teams combining annotation and model evaluation

• Kili Technology fits best

  Teams needing review-heavy multimodal labeling

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Side by side

Feature	FiftyOne 8.6/10 Visit ↗	Kili Technology 7.9/10 Visit ↗
At a glance
Editor score	8.6	7.9
Ranking	#5 in Image Annotation Software	#12 in Image Annotation Software
Best for	ML teams combining annotation and model evaluation	Teams needing review-heavy multimodal labeling
Pricing model	Free	Paid
Starting price	Free	—
Free plan	Not checked yet	—
Free trial	—	14 days
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, macOS, Linux	Web
Support	Email, Community, Docs	Docs
Compliance	ISO 27001, SSO/SAML	SOC 2, ISO 27001, HIPAA, SSO/SAML
Integrations	20 integrations	3 integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features FiftyOne 3/3 · Kili Technology 3/3
Model-assisted labeling	✓	✓
Team collaboration	✓	✓
API access	✓	✓
Specs
Annotation types	bounding boxes; polygons; segmentation masks; classifications; polylines; SAM2 click-to-segment instance segmentation	bounding boxes, polygons, semantic segmentation, pose estimation, named entity recognition, classification
Image formats	JPEG; PNG; BMP	PNG, JPEG/JPG, GIF, BMP, WebP, ICO, JP2, NTF, TIFF/TIF, GeoTIFF
Dataset export	COCO; image directory; image classification directory tree; FiftyOne dataset; Python/CLI export	Kili, YOLO v4, YOLO v5, YOLO v7, YOLO v8, Pascal VOC, COCO, GeoJSON
Our review
Pros	Supports boxes, polygons, masks, classifications, polylines, and SAM2 annotation Combines annotation, review workflows, dataset curation, and model evaluation Offers APIs, self-hosting, exports, and integrations across data systems	Supports image, video, text, PDF, and geospatial annotation Multi-step review workflows with consensus scoring Exports to Kili, YOLO, Pascal VOC, COCO, and GeoJSON
Cons	Enterprise capabilities are organized around contact-sales plans The broad feature set may exceed the needs of simple annotation projects Governed collaborative deployments require the Enterprise offering	Paid plans require contact with sales No ongoing free plan The broad feature set may exceed narrow labeling needs
Our verdict	FiftyOne is an image and multimodal data platform from Voxel51 for computer-vision and machine-learning teams. It combines annotation, dataset curation, model evaluation, review workflows, and dataset export in one environment. Annotation… Read the review →	Kili Technology is a collaborative data-labeling platform for teams building datasets for artificial intelligence and machine-learning models. It supports image, video, text, PDF, and geospatial annotation, including bounding boxes,… Read the review →

Strengths and trade-offs

• FiftyOne — where it wins

  • Supports boxes, polygons, masks, classifications, polylines, and SAM2 annotation
  • Combines annotation, review workflows, dataset curation, and model evaluation
  • Offers APIs, self-hosting, exports, and integrations across data systems

  Where it doesn't

  • Enterprise capabilities are organized around contact-sales plans
  • The broad feature set may exceed the needs of simple annotation projects
  • Governed collaborative deployments require the Enterprise offering

• Kili Technology — where it wins

  • Supports image, video, text, PDF, and geospatial annotation
  • Multi-step review workflows with consensus scoring
  • Exports to Kili, YOLO, Pascal VOC, COCO, and GeoJSON

  Where it doesn't

  • Paid plans require contact with sales
  • No ongoing free plan
  • The broad feature set may exceed narrow labeling needs

• FiftyOne8.6/10 · Open source

  A broad open-source platform for annotation, dataset curation, and model evaluation.

  Visit FiftyOneFull verdict →
• Kili Technology7.9/10 · Pricing on request · 14-day trial

  A broad annotation platform for teams that need structured review and multimodal labeling.

  Try Kili TechnologyFull verdict →