H1 acquires Defacto Health

● STRATEGIC | HEALTHCARE · Payer & Population Health

SEPTEMBER 9, 2026

H1 acquires Defacto Health

TARGET

Payer network intelligence data platform aggregating provider directory and insurance-accepted data for health plans to assess directory accuracy, isolate error clusters, and benchmark networks.

Ownership	Founder-owned
Headcount	2-10 FTEs
Headquarters	Washington, District of Columbia
Leadership	Ron Urwongse, Co-founder Tarun J. Theogaraj, Co-founder
Sell-side advisor	—

ACQUIRER

AI-powered platform combining physician data, the Doctor Graph, and agentic AI workflows to serve pharma, health plans, health systems, and health tech companies.

Ownership	VC-backed · CVS Health Ventures, Altimeter Capital, Goldman Sachs Asset Management, IVP, Menlo Ventures +4 more
Capital raised	$361M
Headcount	~550 FTEs
Headquarters	New York, New York
Leadership	Ariel Katz, co-founder and CEO
Buy-side advisor	—

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H1 -> Defacto Health  (2026-09-11)
strategic_acquisition | Healthcare | announced
Target: Payer network intelligence data platform aggregating provider directory and insurance-accepted data for health plans to assess directory accuracy, isolate error clusters, and benchmark networks.
Website: defacto.health | Buyer site: h1.co
HQ: Washington, District of Columbia | Ownership: founder-owned | Buyer ownership: vc-backed
Advisors - not yet credited
Source: Thematic - https://thematichq.com/software/d/h1-defacto-health.html

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