How it works

Upload your dataset to our secure cloud and create labeling tasks. When you're ready, launch your task to our network of medical experts.

See results within days, not weeks or months.

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Why we're different

Collective intelligence outperforms the competition

By aggregating many opinions, we achieve a level of accuracy proven to outperform any individual board-certified doctor.

Performance-based compensation aligns incentives

We only reward the top performers, so our medical experts give 100% effort on every case they see — ensuring quality at every step, and allowing us to pass cost savings onto you.

Speed you won't believe

Our on-demand network of medical experts produces tens of thousands labels per day.

What we label

Our platform has the flexibility to support your dataset needs.

Supported tasks


Labelers select a label from a pre-defined set of options.

Box Annotation

Labelers draw rectangles to annotate simple shapes.

Polygon Annotation

Labelers draw and adjust polygons to annotate images.

Supported data types





CT Scan





"Centaur’s unique crowd-based labeling technology was a key enabler for us to quickly scale our data and algorithms. Our partnership with them played a large role in our success.

David Hachuel,Co-Founder and CEO of Auggi

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"I get pitched on annotation tools all the time and Centaur is simply the best ... they offer you the accuracy and sophistication of medical experts at the price and speed of Mechanical Turk.

Dhruv Gulati,CEO of Factmata

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