OpenEvidence

OpenEvidence is a next-generation AI platform transforming how healthcare professionals and organizations access and apply medical information.

Latest funding

$250M Series B+ · September 24, 2026

Led by Andreessen Horowitz · Source: refreshmiami.com

Total raised: $985M across 5 sourced rounds

All 5 rounds ↓

Website: openevidence.com.

X: @OpenEvidence · 38,414 followers.

LinkedIn: linkedin.com.

Categories: Foundation models and research Health and bio Data and analytics.

Sectors: Analytics, Artificial Intelligence (AI), Clinical Trials, Database, Health Care.

Stage: Series B+.

Based in: Cambridge, United States.

Founded: 2021.

Total raised: $985M in 5 sourced rounds.

Last round: Sep 24, 2026 · 52 days ago.

Headcount: 101–250 employees.

On Recent Funding since: Sep 29, 2026.

Signals

X account@OpenEvidence · created Nov 10, 2022 (4 years old) · 38,414 followers

Website registeredJan 2, 2004 (22 years old)

About OpenEvidence

Built on cutting-edge large language models and deep clinical data, OpenEvidence enables faster, more reliable, and more personalized decision-making for clinicians and life sciences partners.

TIMELINE · MONEY RAISED

OpenEvidence | 833 days from X account to first raise on record

@OpenEvidence·Raised $985M in 5 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

Date	Round	Amount	Lead	Source
Sep 24, 2026	Series B+	$250M	AAndreessen Horowitz	refreshmiami.com
Jan 21, 2026	Series B+	$250M	DDST Global	techcrunch.com
Oct 20, 2025	Series B+	$200M	GGV	techcrunch.com
Jul 15, 2025	Series B+	$210M	GGV	finsmes.com
Feb 20, 2025	Series A	$75M	SSequoia	axios.com

Timeline

November 10, 2022
X account created
January 2, 2004
Website created

Founders and team

DN
Daniel Nadler Founder

@danielnadler · LinkedIn · Founder profile
ZZ
Zachary Ziegler Founder

@zackmziegler · LinkedIn

Acquisitions

Acquired company	Price	Announced
AAmaro	Not disclosed	Date not given · irblog.prnewswire.com
VVocode	Not disclosed publicly	Date not given

Investors

Companies like OpenEvidence

AActiveloopSeries A · Sep 2024
鱼鱼跃医疗Series A
AAxbioSeries B+ · Jul 2022
CC. Light Technologi
TTwelveLabs$100M Series B+ · Jul 2026
QQubit PharmaceuticalsSeed · Jun 2022

Other companies backed by Andreessen Horowitz

GGeneral Translation$27M Series A · Nov 2026
TTutor Intelligence$75M Series B+ · Nov 2026
NNorthwood$375M Series B+ · Nov 2026
LLarridin$30M Series A · Nov 2026
MMidstream Health$20M Series A · Oct 2026
WWabi$55M Series A · Oct 2026

Andreessen Horowitz portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/openevidence (get a free API key).