Fundraising Fox
🦊/Companies
Sign in

H1

YC W20

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

Find your way into H1

479 people in our graph share verified history with the H1 team — schools, employers, funds. One of them is your warm intro.

Ron Zoriunlockedknows Ariel Katz · together at Columbia University (overlapped)
×10knows the team · via Y Combinator
knows the team · via H1 Insights

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 KatzinFounderAriel Katz previously founded and exited Researchconnection.com. He is now founder of H1, an AI platform that matches medical professionals with clinical trials, patient care, and other healthcare initiatives.30 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

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Competitors · 4

by search overlap
Oup113 shared keywordsOxford University Press (OUP) provides dictionary data, language datasets, and lexical content in over 60 languages to power digital literacy tools, educational software, gaming platforms, and media experiences. The company works across reading apps, word games, quiz shows, and broadcast media to expand access to language learning and comprehension.
IQVIA113 shared keywordsIQVIA is a healthcare data and technology company that supports life sciences organizations in research, clinical development, and commercialization of medicines and medical solutions.
Definitive Healthcare110 shared keywordsDefinitive Healthcare delivers market intelligence and data analytics on healthcare organizations, clinicians, and consumers, serving life sciences companies, healthcare providers, and other industries that interact with healthcare. The company provides data consolidation, analytics services, and digital advertising activation capabilities to help customers make informed decisions in the healthcare market.
World Health Organization, 2025106 shared keywordsThe World Health Organization is a United Nations agency founded in 1948 that leads global health initiatives and emergency response across 194 member states. It works to expand universal health coverage, coordinate responses to health emergencies, and promote healthier lives across all life stages.

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.