We are 30k+ medical professionals and students from top institutions

We partner with healthcare innovators to train frontier AI models. Our community is building the future of healthcare - safer, less biased, and more accessible to everyone.

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Andrew, MD

Anesthesiology Critical Care Medicine & Emergency Medicine

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EJ, MD/MPH

MPH, 2nd Year MD Candidate

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Maren, MD

Obstetrics & Gynecology , Reproductive Endocrinology & Infertility

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Katy, DO

Internal Medicine Hospitalist

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Jacob, MD/PhD

7th yr MD/PhD Candidate, Pharmacology and Regenerative Medicine

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Julius, MD

4th yr MD Candidate, D1 Football, Biomedical Engineer

Quality & Scale

Depth & Breadth

Our medical professionals range from physician specialists with decades of experience to medical students from all walks of life.

Expert AI Training

Every expert is trained & assessed on the foundations of AI & annotation, along with custom training for each project.

Compliance

We have HIPAA, SOC2, FDA, BAA-ready infrastructure & training, PHI de-identification protocols, and role-based access controls designed for compliance.

Our Expertise

Physicians

Nurses

PhDs

Medical Students & Residents

Therapists

Physical Therapists

We partner with healthcare innovators

Folio provides full-service labeling assistance from talent sourcing, ID & certification verification, skill assessments, training, matching and payments.

Reinforcement Learning from Human Feedback (RLHF)

Generate preference pairs that reflect real clinical reasoning. Our experts evaluate response quality based on clinical accuracy, safety, and adherence to standard of care in real care settings—not just fluency.

Rubrics & Verifiers

Transform complex clinical protocols into structured evaluation criteria your models can learn from. We convert unstructured clinical knowledge into measurable verification tasks.

Safety & Red‑Teaming

Models fail in surprisingly human ways: a triage suggestion that downplays red‑flag symptoms, or a draft note that quietly invents an allergy. We work with med students, nurses, residents, and other clinicians‑in‑training to probe for these failure modes, map them into patterns, and give your teams concrete targets for hardening guardrails before they touch patients or staff.

Multimodal

Modern clinical data spans formats: progress notes reference imaging findings, waveforms explain treatment changes, pathology images inform diagnoses. We annotate text, images, audio, video and signals together—the way clinicians actually integrate information.

Shape the future of healthcare