# Centaur.ai

URL: https://sellmydatatoai.net/data-buyers/centaur-ai
Type: Training-data company
Website: https://centaur.ai/
Checked: November 2026

Centaur.ai, formerly Centaur Labs, is a training-data company that labels and evaluates healthcare and life sciences data by combining ratings from medical experts and AI models, weighted by measured accuracy. Its experts compete on the DiagnosUs app for cash prizes. It cites more than 100,000 experts and raised a $16 million Series B in October 2024.

## Key takeaways

- Centaur.ai is a training-data company.
- What it buys: Expert labels on medical images, audio, video, text and waveforms. No company data purchase program published.
- Published payout: Not published. MIT News reported small cash prizes, with one top earner making about $10,000.
- Size requirement: Not applicable. Medical students and professionals join through DiagnosUs.
- Centaur.ai does not publish its exclusivity, fee to seller and payment timing.
- Facts checked on Centaur.ai's own pages in November 2026.

## At a glance

- What it buys: Expert labels on medical images, audio, video, text and waveforms. No company data purchase program published
- Published payout: Not published. MIT News reported small cash prizes, with one top earner making about $10,000
- Size requirement: Not applicable. Medical students and professionals join through DiagnosUs
- Exclusivity: Not published
- Fee to seller: Not published
- Payment timing: Not published

## What does Centaur.ai do?

Centaur.ai provides data annotation and model evaluation, mainly for healthcare and life sciences, across text, image, audio, video and waveform data delivered by API, JSON, CSV or DICOM. It aggregates labels from experts and AI models, trusting each according to performance. Its October 2024 Series B release, led by SignalFire, named Massachusetts General Hospital, Memorial Sloan Kettering and Medtronic among customers.

## How does Centaur.ai pay labelers?

Centaur.ai pays labelers through competitions on its DiagnosUs app, where accurate labelers win small cash prizes, MIT News reported in June 2023. The article said most users earn modest amounts, that the top earner, a doctor in eastern Europe, had made about $10,000, and that about half of users are medical students. Holders of clinical records should read our page for [medical practices](https://sellmydatatoai.net/sell-your-data/medical-practices) before approaching any buyer.

## Sources

- [Centaur.ai homepage](https://centaur.ai/), Centaur.ai, accessed November 2026
- [About](https://centaur.ai/about), Centaur.ai, accessed November 2026
- [Centaur Labs secures $16M in Series B funding to help health and scientific organizations accelerate AI development](https://www.newswire.com/news/centaur-labs-secures-16m-in-series-b-funding-to-help-health-and-22440215), Newswire, accessed November 2026
- [Gamifying medical data labeling to advance AI](https://news.mit.edu/2023/gamifying-medical-data-labeling-ai-0628), MIT News, accessed November 2026

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