Fundraising Fox

H1

YC W20

New York City, US · Founded 2017 · 500 employees · 8 known investors

H1 operates an AI-driven platform that integrates healthcare data to identify and match doctors for clinical trials, patient care, medical affairs, and referrals. The company serves pharmaceutical companies, healthcare providers, and other organizations that need to connect with appropriate medical expertise.

AI & Machine LearningDigital HealthHealthtechHealth TechHealthcareUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W20)

H1 was founded in 2017 by Ariel Katz and Ian Sax.

AKAriel Katz
Ariel KatzinFounder30 Under 30 2022
ISIan Sax
Ian SaxinFounder

Investors · 8

Communitas Capital PartnersNew York
Dorm RoomBrooklyn · $90K – $250K
Glynn Capital ManagementMenlo Park
HealthX VenturesMadison
IVP (Institutional Venture Partners)San Francisco · $15M – $75M
Menlo VenturesSan Francisco · $1M – $20M
Underscore VCBoston
Y CombinatorSan Francisco · $500K

Competitors · 3

by search overlap
Oup113 shared keywordsOxford University Press publishes research, educational, and reference materials, including reports on reading and children's learning, and reference resources such as its dictionary "Word of the Day." It serves readers, educators, and learners across a wide range of subjects worldwide.
IQVIA113 shared keywordsIQVIA provides data, analytics, AI, and technology-driven services for life sciences and healthcare organizations, spanning clinical development, real world evidence generation, and commercial execution. It offers integrated solutions for clinical trials, regulatory and safety compliance, and market analytics, including agentic AI products for commercial and R&D teams.
Definitive Healthcare110 shared keywordsDefinitive Healthcare provides a healthcare commercial intelligence platform with all-payor claims data, reference data, and analytics on hospitals, physicians, payors, procedures, diagnoses, and prescriptions. It serves life sciences companies, healthcare providers, and healthcare-adjacent businesses for market analysis, targeting, and sales and marketing efforts, with an AI-powered intelligence product announced for Winter 2026.

Companies competing with H1 for the same Google search keywords, organic and paid, via search-intersection analysis.

Acquisitions · 1

Early investors' stakes continue via these deals
Ribbon Health

Ribbon Health was a healthcare data platform providing APIs with accurate information on providers, insurance plans, costs, and quality of care to power care navigation and provider directories. Acquired by H1.

In the news

H1 global fintech funding grows 23% YoYfinextra.com · Jul 2026Biggest Funding Rounds for Serbia (H1 2026)therecursive.com · Jul 2026India's fintech sector raises $2 bn in H1 2026, led by late-stage funding | Finance News - Business Standardbusiness-standard.com · Jul 2026Fintech Funding Surges 23% In H1 2026 As Investors Concentrate Their Bets On AI And Financial Infrastructurenews.crunchbase.com · Jul 2026H1 2026 funding and market overview: Durable roots, shifting routes | Rock Healthrockhealth.com · Jul 2026Rock Health H1 2026 Digital Health Funding Recap: Startups Hit $7.4B in Venture Reboundhitconsultant.net · Jul 2026This Startup Raised $100 Million In Bid To Power All Doctor Information On The Internetforbes.com · Nov 2021H1 Raises Series Ch1.co · Nov 2021

Frequently asked questions

What does H1 do?
H1 operates an AI-driven platform that integrates healthcare data to identify and match doctors for clinical trials, patient care, medical affairs, and referrals. The company serves pharmaceutical companies, healthcare providers, and other organizations that need to connect with appropriate medical expertise.
Who founded H1?
H1 was founded by Ariel Katz, Ian Sax in 2017.
Who are H1's investors?
H1's investors include Communitas Capital Partners, Dorm Room, Glynn Capital Management, HealthX Ventures, IVP (Institutional Venture Partners), Menlo Ventures, Underscore VC, Y Combinator.
Where is H1 headquartered?
H1 is headquartered in New York City, US.