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Legion Health

San Francisco, CA, USA11+ employeesSeed raised
AI-native psychiatry, built for scale and covered by insurance

AI-native psychiatry, built for scale and covered by insurance

YC S21

About the Company

We’re rebuilding psychiatry from the ground up—AI-native, insurance-covered, and engineered to scale.

Legion Health is a high-quality psychiatry network where patients get care from licensed clinicians, fast and affordably. Under the hood, our LLM agents and orchestration layer automate operations, reduce admin, and enable truly great care.

Most startups bolt AI onto broken workflows. We’re replacing the workflows—and the system underneath.

If you’ve ever wanted to use AI to actually fix something that matters, this is your shot.

Tech Stack

Technology at Legion

We are revolutionizing telepsychiatry through a core AI infrastructure that enables a vastly improved patient experience and quality of mental health care. We are actively improving our services in ingesting, chunking, embedding, caching, and searching to achieve this goal. Our technical goals include:

  • Enhanced processing: Implement robust data structures and caching mechanisms to handle increasing volumes of language data spanning every facet of patients’ care while minimizing latency and maximizing system responsiveness.
  • System scalability: Ensure our systems can scale effectively to support growth from one million to hundreds of millions of data points.
  • Securing sensitive data: Uphold the highest standards of data security and privacy in compliance with HIPAA guidelines.

##Stack TypeScript, Node.js, PostgreSQL, Redis, Supabase, Azure, Google Cloud, AWS, LangChain, PostHog, Retool

Founders

Arthur MacWaters
Arthur MacWaters

Co-Founder and President of Legion Health (YC S21) Princeton 2018. Ex-Mckinsey

Yash Patel
Yash Patel

Co-Founder and CEO of Legion Health (S21)

Daniel Wilson
Daniel Wilson

Co-Founder and CTO of Legion Health (YC S21) Builder, optimizer, and dreamer. Former Microsoft Excel PM.

Open Positions at Legion Health (8 Jobs)

Legion Health logo
Legion Health
Insurance Directory Optimization Specialist (backed by Y Combinator, $1M+ ARR, $6.3M+ raised)
San Francisco, CA, US / Remote$30K - $100K CONTRACTOR
Remote
19 hours ago
Legion Health logo
Legion Health
Psychiatric Mental Health Nurse Practitioner (PMHNP) — Part-Time, Full-Time, Hybrid (Texas)
TX, US / Remote (TX, US)$120K - $230K FULL_TIME
Remote
19 hours ago
Legion Health logo
Legion Health
Psychiatric Mental Health Nurse Practitioner (PMHNP) — Part-Time, Full-Time, Remote (Texas, USA)
TX, US / Remote (TX, US)$120K - $230K FULL_TIME
Remote
19 hours ago
Legion Health logo
Legion Health
Collaborating Psychiatrist (Supervising Physician) — Texas, USA, Remote, Part-Time, MD or DO
TX, US / Remote (TX, US)$100K - $400K CONTRACTOR
Remote
19 hours ago
Legion Health logo
Legion Health
Collaborating Psychiatrist (Supervising Physician) — Texas, Fully Remote, Part-Time
TX, US / Remote (TX, US)$100K - $400K CONTRACTOR
Remote
19 hours ago
Legion Health logo
Legion Health
Founding Engineer | 👨🏻‍💻 AI-Native Mental Health Care (backed by Y Combinator, $3.3M+ ARR, $7M+ raised)
San Francisco$140K - $220K FULL_TIME
19 hours ago
Legion Health logo
Legion Health
AI Search, SEO, and Content Specialist (backed by Y Combinator, $1M+ ARR, $6.3M+ raised)
US / Remote$50K - $200K CONTRACTOR
Remote
19 hours ago
Legion Health logo
Legion Health
Psychiatric Mental Health Nurse Practitioner (PMHNP) — Part-Time, Full-Time, Remote (Utah, USA)
UT, US / Remote (UT, US)$120K - $230K FULL_TIME
Remote
19 hours ago

Ready to start your space career at Legion Health?

Shipping like we're funded. We're not. No affiliation.

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