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Centaur Labs is a technology company.
Centaur.ai provides high-quality, trusted data annotation at scale, leveraging collective intelligence to power the development of superior AI models.
Centaur Labs has raised $35.0M across 3 funding rounds.
Centaur Labs has raised $35.0M in total across 3 funding rounds.
Centaur Labs is a Boston-based technology company specializing in high-quality medical data labeling for healthcare AI, enabling developers to build, monitor, and validate models at scale.[1][2][3] It leverages a global network of over 58,000 healthcare experts, including medical professionals and students, to annotate multimodal data such as images (e.g., X-rays, CT/MRI, pathology), videos (e.g., surgical footage), text (e.g., medical notes), audio (e.g., heart/lung sounds), and waveforms.[1][2][4] The platform serves medical devices, life sciences, consumer health, insurance, and institutions like Memorial Sloan Kettering, Mass General Brigham, Medtronic, and Paige.AI, solving the critical challenge of accurate, scalable datasets for AI training amid growing demand in healthcare AI.[1][2][3]
Founded in 2017 with 30-50 employees operating in a hybrid model, Centaur has raised $31M total, including a $16M Series B in October 2024 led by SignalFire (with Matrix, Susa Ventures, Samsung Next, and Alumni Ventures) and prior rounds like $15.9M Series A.[2][3] Its growth momentum includes 2023 milestones such as publishing 7 academic papers, securing largest deals to date, releasing APIs, a desktop labeling tool powered by Meta’s Segment Anything model, SOC2 Type 2 and HIPAA compliance, and a new Validation dataset solution, positioning it strongly for AI expansion.[2]
Centaur Labs was founded in 2017 in Boston by Erik Duhaime (CEO), Tom Gellatly, and Zach Rausnitz, all MIT alumni with deep expertise in AI, engineering, and data labeling.[2][5] Duhaime, an MIT alumnus, brings executive experience from Yahoo, LinkedIn, Google, and Meta, including as Tinder's former CTO; the team collectively has strong AI research and product development backgrounds.[1][5] Gellatly, with a University of Michigan CSE background, was the first employee at ride-sharing startup Sidecar (acquired by GM) and led mapping/data labeling at Cruise Automation.[5] Rausnitz is a self-taught generalist software engineer from Washington City Paper.[5]
The idea emerged from recognizing the bottleneck in medical AI: unreliable data labeling reliant on single experts. They created DiagnosUs, a gamified app that challenges medical professionals worldwide with labeling tasks for cash prizes, harnessing collective intelligence for superior accuracy.[3][5] Early traction built through Y Combinator's Winter 2019 batch, partnerships with top institutions, and iterative innovations, evolving from annotation services to a full platform with performance incentives and quality checks.[2][5]
Centaur Labs stands out in the data labeling market through these key strengths:
Centaur Labs rides the explosive growth of healthcare AI, where high-quality labeled data is the foundational bottleneck for models in diagnostics, drug discovery, and devices—market forces amplified by AI investments surging post-ChatGPT and regulatory pushes for validated AI (e.g., FDA approvals).[1][2] Timing is ideal: 2023-2024 saw AI tailwinds in healthcare, with Centaur's expansions (APIs, compliance) aligning with rapid adoption in imaging, pathology, and wearables.[2]
It influences the ecosystem by powering breakthroughs at elite partners (e.g., Mass General, Paige.AI), publishing research to validate methods, and enabling smaller AI teams to compete via scalable, expert-sourced data—democratizing access amid a projected $100B+ healthcare AI market.[2][3] This positions Centaur as a critical enabler, reducing data costs and errors that plague 80-90% of AI project failures.
Centaur Labs is primed for acceleration, with deepening partnerships, sales/CS team growth, and penetration into high-investment areas like oncology imaging and digital therapeutics.[2] Trends like multimodal foundation models, edge AI in devices, and stricter data provenance regulations will amplify demand for its collective-intelligence edge, potentially driving 2-3x growth via enterprise expansions and international scaling.[1][2]
Its influence could evolve from niche labeler to AI infrastructure leader, especially if it expands beyond healthcare or acquires complementary tools—watch for Series C and big tech integrations. This mission-driven platform, born from founders' AI pedigrees, exemplifies how specialized data unlocks healthcare's AI revolution.[5][6]
Centaur Labs has raised $35.0M in total across 3 funding rounds.
Centaur Labs's investors include Alumni Ventures, Andreessen Horowitz, AV8 Ventures, Intel Capital, Madrona Ventures, Rabbit Ventures, SignalFire, Ten Eleven Ventures, Accomplice VC, Alabaster, Cherubic Ventures, FAST — by GETTYLAB.
Centaur Labs has raised $35.0M across 3 funding rounds. Most recently, it raised $16.0M Series B in October 2024.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Oct 1, 2024 | $16.0M Series B | Alumni Ventures, Andreessen Horowitz, AV8 Ventures, Intel Capital, Madrona Ventures, Rabbit Ventures, SignalFire, Ten Eleven Ventures | |
| Aug 1, 2021 | $15.0M Series A | Accomplice VC, Alabaster, Cherubic Ventures, FAST — by GETTYLAB, Founder Collective, Foundry Group, Fusion Fund, Granite Ventures, Heartcore Capital, Matrix, Primetime Partners, Scale Asia Ventures, SOSV, Stata Venture Partners, Susa Ventures, Tiger Global Management, Jason Haider, Joi Ito, Paul Veugen, Scott Belsky, Steph Korey, TJ Parker | |
| May 1, 2019 | $4.0M Seed | Accomplice VC, Alabaster, Founder Collective, Foundry Group, Fusion Fund, LombardStreet Ventures, Long Journey Ventures, Night Capital, Pareto Holdings, Primetime Partners, Scale Asia Ventures, SOSV, Stata Venture Partners, Tiger Global Management, Jason Haider, Joi Ito, Paul Veugen, Sam Shank, Scott Banister, Scott Belsky |