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FiftyOne
What it is
FiftyOne Annotation for images is an open-source platform for finding samples to label, automating annotation with AI, and connecting labeling to model evaluation. It supports bounding boxes, polygons, segmentation masks, classifications, polylines, and SAM2 click-to-segment instance segmentation. A natural-language labeling agent can generate pre-labels for human review. Workflows can include multiple stages, review steps, rejection loops, and quality gates. Listed integrations include CVAT, Label Studio, V7, and Labelbox for annotation, plus Qdrant, Redis, and Pinecone for vector search. Deployment options span cloud or multi-cloud, hybrid, on-premise, air-gapped, and managed services. FiftyOne says datasets remain in the customer’s environment rather than being stored or transmitted by the platform, and it supports anonymizing personally identifiable and protected health information. Voxel51 states it maintains ISO 27001 certification and undergoes regular third-party security testing.
For and against
For
- Supports varied image annotation types
- Natural-language pre-labeling agent
- Multi-stage review workflows
- Cloud, on-premise, and air-gapped deployment
- Datasets remain in customer environment
Against
- Enterprise support varies by plan
- Requires labeling or vector-search integrations for those workflows
The verdict
FiftyOne connects image annotation, review, and model evaluation in a flexible platform. Its open-source availability and deployment options suit teams with specific infrastructure or data-handling requirements.
Who it suits
It is intended for AI builders and machine-learning teams working with multimodal data at scale. The deployment and integration choices also suit teams needing self-hosted or isolated environments.
Plans and prices
Custom
Unlimited user seats · Unlimited guest seats · Unlimited VPUs · Unlimited production and dev/staging deployments
Read 5 Oct 2026 · voxel51.com
Growth
25 user seats · 100 guest seats · 20 VPUs · 14,000 hours/month compute
Read 5 Oct 2026 · voxel51.com
Team
8 user seats · 16 guest seats · 4 VPUs · 2,800 hours/month compute
Read 5 Oct 2026 · voxel51.com
On the record
- Agentic labeling
- Users can prompt a labeling agent in natural language to generate pre-labels and combine them with human review.voxel51.com · read 5 Oct 2026
- Annotation types
- Image annotation supports bounding boxes, polygons, segmentation masks, classifications, polylines, and SAM2 click-to-segment instance segmentation.voxel51.com · read 5 Oct 2026
- Company founding
- Voxel51 says it was founded in 2018 at the University of Michigan by Professor Jason Corso and PhD student Brian Moore.voxel51.com · read 5 Oct 2026
- Data handling
- The security page states that FiftyOne does not store or transmit datasets and that data remains in the customer's environment.voxel51.com · read 5 Oct 2026
- Deployment
- FiftyOne deployment options include cloud or multi-cloud, hybrid, on-premise, air-gapped, and managed services.voxel51.com · read 5 Oct 2026
- Image workflows
- The image annotation platform supports multi-stage workflows with review stages, rejection loops, and quality gates.voxel51.com · read 5 Oct 2026
- Integrations
- The official integrations documentation lists annotation integrations including CVAT, Label Studio, V7, and Labelbox, and vector search integrations including Qdrant, Redis, and Pinecone.docs.voxel51.com · read 5 Oct 2026
- Intended users
- Voxel51 describes FiftyOne as a platform for AI builders and machine-learning teams working with multimodal data at scale.voxel51.com · read 5 Oct 2026
- Purpose
- FiftyOne Annotation for images helps identify samples for labeling, automate annotation with AI, and connect labeling with model evaluation.voxel51.com · read 5 Oct 2026
- Security
- Voxel51 states that it maintains ISO 27001 certification and undergoes regular third-party penetration and vulnerability tests.voxel51.com · read 5 Oct 2026
- Sensitive data
- FiftyOne supports data anonymization to protect personally identifiable and protected health information.voxel51.com · read 5 Oct 2026
- Support
- The Team plan lists standard enterprise support, Growth lists premium enterprise support, and Custom lists a dedicated customer success team.voxel51.com · read 5 Oct 2026
