We helped create today's online advertising landscape by building pioneering companies like DoubleClick (now Google), AppNexus (now Microsoft), and Freewheel (now Comcast). These companies introduced groundbreaking technologies in programmatic and streaming TV advertising.
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We have a proven track record of creating large-scale platforms that empower advertisers and publishers to manage their data and intellectual property while fostering strong relationships with customers.

With Firsthand, we’re driven to make AI solutions safe, sustainable, and scalable for brands, agencies, and publishers.
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Jonathan Heller

co-CEO, Founder,
& Chairman

Michael Rubenstein

co-CEO, Co-Founder,
& Board Director

Wei Wei

CTO, co-founder,
& Board Director

Veronique Valcu

head of marketing

Daniel Lynch

Head of Finance

Sara Wallace

founding director
of product