Viz.ai saves lives by getting stroke patients to treatment faster. Their AI analyzes brain scans in seconds, detects large vessel occlusions (the deadliest strokes), and instantly alerts the right specialist — cutting the time to treatment by an average of 26 minutes. In stroke treatment, every minute equals 1.9 million neurons lost. Viz.ai's technology has been used on over 1 million patients. This is AI doing what AI should do: saving lives that humans would lose to paperwork delays.
Founded
2016
HQ
San Francisco, USA
Total Raised
$252 million
Founder
David Golan, Chris Mansi
Status
Private
Website
www.viz.aiTHE ORIGIN STORY
Dr. Chris Mansi (a neurosurgeon) and David Golan (a data scientist) met and realized that stroke patients were dying not because treatment did not exist, but because the detection-to-treatment pipeline was too slow.
A brain scan might sit in a radiology queue for hours while a patient's brain tissue dies. They built an AI that analyzes CT scans in real-time, detects strokes instantly, and sends an alert directly to the neurosurgeon's phone.
The FDA cleared Viz.ai's stroke detection AI in 2018 — it was one of the first AI-powered medical devices to receive FDA clearance.
WHAT THEY ACTUALLY DO
SaaS subscription for hospitals and health systems. Hospitals pay an annual license fee per facility for access to Viz.ai's detection and coordination platform.
Revenue scales with hospital adoption and expansion into new disease areas. The value proposition is measurable: faster treatment, better outcomes, fewer malpractice claims.
THE PRODUCTS
Viz.ai Stroke Detection (LVO detection from CT scans). Viz.ai Pulmonary Embolism (PE detection).
Viz.ai Aortic Disease (aneurysm detection). Viz.ai Coordination Platform (alert and coordinate care teams).
Real-time AI analysis and specialist notification.
HOW THEY GREW
Clinical evidence-driven sales. Viz.ai grew by publishing peer-reviewed studies showing that its AI reduced time-to-treatment for stroke patients by 26+ minutes.
Hospitals that adopted Viz.ai saw measurably better outcomes, which drove word-of-mouth among hospital networks. The company expanded from stroke into pulmonary embolism, aortic disease, and other time-sensitive conditions.
THE HARD PART
Hospital procurement cycles are notoriously slow — getting a new technology into a hospital can take 12-18 months. Regulatory requirements for medical AI are complex and country-specific.
Competition from large medical imaging companies (GE, Siemens, Philips) adding AI features to their existing platforms.
MONEY TRAIL
Seed
2017 · Led by GV (Google Ventures)
$8M raised
Series A
2018 · Led by Kleiner Perkins
$21M raised
Series B
2019 · Led by Scale Venture Partners
$26M raised
Series C
2021 · Led by Tiger Global
$71M raised
Series D
2022 · Led by Insight Partners
$100M raised
$1.2B valuation
WHO BACKED THEM
Backed by Insight Partners, Tiger Global, GV (Google Ventures), and Kleiner Perkins. Insight Partners led the $100 million Series D in 2022.
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