Centaur Labs

What Centaur Labs does

Centaur Labs operates a collective-intelligence data annotation platform purpose-built for medical and life sciences AI. The company's core offering combines a global network of 100,000+ vetted subject matter experts with frontier AI models in a competitive labeling workflow, then aggregates their outputs using a proprietary performance-weighted algorithm that produces consensus labels outperforming any single annotator. The platform supports multi-modal annotation across text, images, video, audio, and waveform data (including DICOM medical imaging), with native integrations for the OHIF medical imaging viewer and Meta's Segment Anything Model for AI-assisted auto-segmentation. Output is delivered as production-ready training and evaluation datasets via API, JSON, CSV, or DICOM, and includes audit trails, Gold Standard validation, and observability tooling designed to support FDA-regulated customers building SaMD and AI-enabled medical devices.

The company serves enterprise customers primarily in medical devices, life sciences and pharmaceuticals, AI labs building medical or scientific LLMs, and healthcare providers. Named customers include Paige AI, Medtronic, Memorial Sloan Kettering Cancer Center, Mass General Brigham, NIH, VUNO, SciBite (Elsevier), Eko, Activ Surgical, Satisfai Health, and Eight Sleep. Revenue is generated through enterprise, quote-based service contracts with subscription-style recurring engagements, sold via direct field sales, inside sales, and API-based programmatic access. Distribution leverage is augmented by Microsoft for Startups, NVIDIA Inception, AWS Global Startup, and channel partners including Lucem Health (Mayo Clinic spin-out) and Dandelion Health. The company has raised approximately $31 million across seed, Series A (Matrix Partners, 2021), and Series B (SignalFire, 2024), and maintains SOC 2 Type II and HIPAA compliance with a Boston, MA headquarters.

Name

Centaur Labs

Legal name

Centaur Diagnostics, Inc.

Website

https://centaur.ai

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

Centaur Labs is a Boston-based collective intelligence platform that combines a global network of 100,000+ medical experts with frontier AI models to produce regulatory-grade, multi-modal data annotation services for healthcare, life sciences, and medical AI customers.

Ownership category

akta.pro rank

Product category

AI Data Annotation and Labeling Services

NAICS

Medical Laboratories (621511), Analytical Laboratory Instrument Manufacturing (334516)

SIC

Services-Medical Laboratories (8071)

akta.pro primary industry

Data Labeling & Annotation Services (HDAAALAB)

akta.pro secondary industry

Annotation Tooling & Workflow Management (HDAAALAC)

Keywords

• Medical data annotation
• AI training data
• Expert labeling services
• Healthcare AI datasets
• Collective intelligence platform

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure, Others

Revenue model

1. Expert Data Labeling and Annotation Services: Centaur Labs provides managed data annotation services where clients submit raw data (medical images, clinical text, audio, video, waveforms) and receive production-ready labeled datasets via API, JSON, CSV, or DICOM. Pricing is likely project-based, determined by data volume, modality complexity, required expert specialties, and turnaround time. No public pricing is disclosed; engagements are quote-based.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

Centaur Labs operates an expert data annotation platform and managed labeling service that combines inputs from a global network of 100,000+ subject matter experts with AI model outputs to produce production-ready labeled datasets. The platform supports multi-modal data (text, image, video, audio, waveform) with native DICOM and SAM auto-segmentation, and serves AI teams in medical devices, life sciences, healthcare, and adjacent industries.

Product overview

Centaur Labs offers a unified expert data annotation platform for medical AI development. The core platform combines collective intelligence methodology with competitive expert annotation, aggregating predictions from human specialists and AI models to produce superhuman-quality labeled datasets. Key product components include the main annotation platform, SAM Auto-Segmentation for AI-assisted image segmentation, the Annotator Arena quality playground, and the Desktop Labeling Platform. The platform supports multi-modal data types (text, image, video, audio, waveform) and is used by AI teams across healthcare, life sciences, medical devices, and insurance industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Centaur AI Platform Expert medical data annotation platform that combines collective intelligence from a global network of 100,000+ subject matter experts and AI models. The platform aggregates multiple opinions, measures performance against Gold Standards, and delivers production-ready labeled datasets in text, image, video, audio, and waveform modalities for medical AI teams in healthcare, life sciences, and medical devices.
• Annotator Arena Interactive competitive benchmarking environment that lets users compare Centaur's aggregation performance against individual human experts and leading AI models on identical medical labeling tasks such as skin lesion classification, retinal OCT grading, and ICD-10 coding.
• Quality Playground Interactive tool that lets users adjust the mix of human and AI labelers in real time, visualize cost versus accuracy tradeoffs, and compare their labeling strategies against Centaur's optimization output.
• Medical Consultant Network Global network of 100,000+ subject matter experts including board-certified physicians, medical students, and specialists who perform paid annotation tasks across healthcare domains for Centaur customers.

Quantifiable outcome

• Improved model F1 score from 0.6 to 0.83 for Paige's breast cancer detection AI
• +4 more outcomes

Named customers15 records

Segments9 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

AI capability11 records

Feature7 records

Partnerships

17 partnerships are on record, tiered core, major and minor.

• ProtegecoreStrategic or Co-development Partner · 22 October 2024Partnership aimed at accelerating AI development by combining Protege's capabilities with Centaur's expert annotation platform for healthcare and research technology applications.
• MicrosoftcoreStrategic or Co-development Partner · 8 October 2024Partnership under Microsoft for Startups and Microsoft for Startups Founders Hub. Collaboration on PadChest-GR dataset with Microsoft Research and University of Alicante, the first multimodal bilingual sentence-level grounded radiology reporting dataset for GenAI. Centaur provided expert annotation support for the dataset.
• Dandelion HealthmajorTechnology or Integration · 21 November 2022Partnership enabling AI developers to access high-quality clinical data at scale. Dandelion Health provides ML-ready clinical datasets while Centaur provides expert annotation services for model training and evaluation.
• ConsensusminorChannel Partner/ Reseller/ Distributor · 2 September 2022Consensus, an AI-powered scientific search engine, partnered with Centaur to generate high-quality, scalable scientific data labels for research. Centaur annotations improve the accuracy of Consensus's scientific search algorithm.
• Lucem Health (Mayo Clinic Spin-out)majorChannel Partner/ Reseller/ Distributor · 1 August 2022Lucem Health, a spin-out from Mayo Clinic, partnered with Centaur to provide clinical AI development teams with access to high-quality medical data annotations at scale. The partnership enables healthcare AI developers to integrate expert-labeled data into their development pipelines.
• Brigham and Women's Hospital (BWH)coreStrategic or Co-development Partner · 8 July 2021Awarded $750,000 MLSC Bits to Bytes grant in collaboration with BWH to convert lung ultrasound exams into expert-annotated datasets for respiratory AI. BWH researchers and Centaur co-published crowdsourced annotation research accepted at MICCAI 2024. The collaboration also received a $750K Massachusetts Life Sciences Center grant for point-of-care ultrasound AI development.
• Microsoft for StartupsmajorGTM or Marketing PartnerMicrosoft for Startups program providing go-to-market support, co-selling opportunities, and access to Azure cloud infrastructure for startups building on the Microsoft ecosystem.
• NVIDIA Inception ProgrammajorGTM or Marketing PartnerNVIDIA Inception program providing AI startups with go-to-market support, technology benefits, and investment opportunities. Centaur's GPU-accelerated annotation and SAM integration align with NVIDIA's AI ecosystem.
• AWS Global Startup ProgrammajorGTM or Marketing PartnerAWS startup program providing cloud infrastructure credits, go-to-market support, and technical enablement. AWS is listed as a subprocessor for cloud infrastructure in Centaur's privacy policy.
• InnoliticsminorImplementation/ SI/ Consulting PartnerRegulatory consulting partner specializing in FDA 510(k) submissions and medical device AI clearance. Helps Centaur customers navigate regulatory requirements for AI development.
• DeepC.aiminorChannel Partner/ Reseller/ DistributorClinical AI deployment partner helping integrate AI solutions into existing clinical workflows and hospital systems, driving adoption of AI models trained on Centaur-annotated data.
• SegMedminorChannel Partner/ Reseller/ DistributorHealthcare data marketplace partner providing access to ML-ready global medical datasets. SegMed enables organizations to access diverse, de-identified datasets that can be annotated by Centaur's expert network.
• Gradient HealthminorChannel Partner/ Reseller/ DistributorHealthcare AI data partner providing broad multimodal medical datasets including diverse global populations and anatomical ROIs. Enables Centaur customers to access training data alongside annotation services.
• AigoraminorChannel Partner/ Reseller/ DistributorConsumer and retail AI partner providing data access and deployment support. Represents Centaur's expansion beyond healthcare into consumer intelligence use cases.
• Asher Orion GroupminorImplementation/ SI/ Consulting PartnerRegulatory and clinical strategy consulting partner helping medical AI companies achieve regulatory clearance and navigate FDA submission requirements.
• FIDiminorChannel Partner/ Reseller/ DistributorHealthcare AI data partner providing Brazilian/LATAM medical imaging datasets, supporting Centaur's global data access capabilities and diverse patient population coverage.
• DeepC.aiminorChannel Partner/ Reseller/ DistributorClinical AI deployment and adoption partner helping healthcare organizations integrate AI solutions into existing clinical workflows and systems.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• SuperAnnotate: AI data annotation platform supporting image, video, text, and multi-modal labeling with managed services. Comparable to Centaur across modality coverage and enterprise customer base, though less medical-specialized.
• Scale AI: Largest general-purpose data annotation platform offering managed labeling services across image, text, and video. Directly comparable to Centaur as an enterprise annotation provider, though Scale's scale and capital base dwarf Centaur's medical-specialized offering.
• Appen: Public data annotation company providing crowd-sourced labeling across 235+ markets and 80+ languages. Comparable to Centaur as an enterprise annotation services provider, with deeper multilingual and breadth coverage but less medical-domain specialization.
• Labelbox: Enterprise data labeling platform combining annotation tooling with managed labeling services. Directly comparable to Centaur's platform-plus-services model, with a broader horizontal focus rather than Centaur's medical vertical.
• Surge AI: Data labeling platform focused on RLHF, evaluation, and LLM training data with a domain-expert workforce. Closely comparable to Centaur's expert-network methodology and LLM evaluation positioning, with a broader horizontal scope.
• Snorkel AI: Data-centric AI platform combining programmatic labeling with expert-in-the-loop workflows. Comparable to Centaur in serving regulated enterprise AI teams, with a more programmatic approach versus Centaur's pure expert-crowd methodology.
• Encord: Medical imaging annotation platform serving AI teams in radiology, pathology, and surgery. Directly comparable to Centaur on medical imaging focus, with more emphasis on in-house labeling tooling rather than managed expert services.
• iMerit: Data labeling services company with deep healthcare, medical imaging, and autonomous systems focus. Comparable to Centaur on enterprise services model and healthcare vertical, with larger global delivery workforce.
• Sama: AI data annotation platform offering managed labeling services across computer vision and NLP. Comparable to Centaur's managed-services-plus-platform model, with a strong social-impact workforce angle rather than medical specialization.
• CloudFactory: Managed data labeling services combining a distributed workforce with AI-assisted tooling. Comparable to Centaur on enterprise services model and AI-assisted annotation, with less regulatory/medical specialization.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/centaurlabs
• LinkedInlinkedin.com/company/centaur-labs
• Facebookfacebook.com/CentaurLabs

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds6 records

Investors17 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Centaur Labs