FiftyOne vs Ultralytics Platform

FiftyOne8.6Visit Ultralytics Platform7.7Visit

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

vs

Ultralytics Platform #14 in Image Annotation Software 7.7/10 Free plan Free plan✓ 3 of 3 features Visit Ultralytics

• FiftyOne fits best

  ML teams combining annotation and model evaluation

• Ultralytics Platform fits best

  YOLO-focused teams needing integrated workflows

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Side by side

Feature	FiftyOne 8.6/10 Visit ↗	Ultralytics Platform 7.7/10 Visit ↗
At a glance
Editor score	8.6	7.7
Ranking	#5 in Image Annotation Software	#14 in Image Annotation Software
Best for	ML teams combining annotation and model evaluation	YOLO-focused teams needing integrated workflows
Pricing model	Free	Free plan + paid
Starting price	Free	$29/seat/mo
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, macOS, Linux	Web
Support	Email, Community, Docs	Community, Docs
Compliance	ISO 27001, SSO/SAML	SOC 2, ISO 27001, GDPR, SSO/SAML
Integrations	20 integrations	4 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features FiftyOne 3/3 · Ultralytics Platform 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	detection; instance segmentation; semantic segmentation; classification; pose estimation; oriented bounding boxes
Image formats	JPEG; PNG; BMP	JPEG; PNG; WebP; TIFF; HEIC; AVIF; BMP; JP2; DNG; MPO
Dataset export	COCO; image directory; image classification directory tree; FiftyOne dataset; Python/CLI export	Ultralytics NDJSON
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	YOLO- and SAM-assisted labeling plus detailed annotation tools Training, deployment monitoring, versioning, and REST API access Cloud storage integrations with web and API access
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	Verified dataset export is centered on Ultralytics NDJSON Free plan includes community support and lower usage limits Pro collaboration is limited to teams of up to 5 members
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 →	Ultralytics Platform is a browser-based computer vision workspace for individuals and teams managing the full image-model workflow. It combines manual annotation with bounding boxes, polygons, keypoints, oriented boxes, and classification,… 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

• Ultralytics Platform — where it wins

  • YOLO- and SAM-assisted labeling plus detailed annotation tools
  • Training, deployment monitoring, versioning, and REST API access
  • Cloud storage integrations with web and API access

  Where it doesn't

  • Verified dataset export is centered on Ultralytics NDJSON
  • Free plan includes community support and lower usage limits
  • Pro collaboration is limited to teams of up to 5 members

• FiftyOne8.6/10 · Open source

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

  Visit FiftyOneFull verdict →
• Ultralytics Platform7.7/10 · Free plan

  A YOLO-focused workspace combining annotation, datasets, training, deployment, and collaboration.

  Visit UltralyticsFull verdict →