Rajeev
Goel.

In the mid-2000s, the smart money in ad tech was on the buy side. Demand-side platforms had the math, the venture capital, and the better-dressed founders. Most of the platforms that publishers used were repurposed versions of those same tools, pointed in the wrong direction. Goel co-founded PubMatic on the unfashionable observation that the people producing the content were running the auctions with worse instruments than the people buying them.

The fix was unsentimental: build software that helped publishers see what their inventory was worth in real time, then route demand to it without a middleman taking a cut every time the lights blinked. This is the kind of idea you can describe at a dinner party in under a minute. Executing it across two decades, three platform shifts, and one set of walled gardens that grew fingernails is a different matter.

Before PubMatic there was Chipshot.com, an online retailer of custom-built golf clubs Goel co-founded with his brother Amar in the late 1990s while still in college. He was the VP of technology. The company was a real business - clubs got shipped, customers got fitted, dot-com era e-commerce got learned the hard way - and it taught the brothers what it felt like to build something that other people would pay for. It was also the first time they tried out a working pattern that would outlast a generation of co-founder breakups elsewhere in the Valley: they did it together, and they kept doing it together.

The interim chapter is the one nobody mentions. Goel spent time as a product marketing director at SAP, with responsibility for global go-to-market on new products. It is a job whose chief educational value is teaching young entrepreneurs the texture of a large, deliberate enterprise: how slowly decisions move, how thoroughly they are documented, and how unfunny everyone is about quarterly numbers. He has run a public company since 2020 without ever sounding surprised by the paperwork.

PubMatic was incorporated in 2006 with Amar, Anand Das, and Mukul Kumar. Goel took over as CEO in December 2008, at the peak of the financial crisis - a time when most ad tech CEOs were either updating their LinkedIns or asking for a bridge round. He stayed.

Goel's current obsession is the part of the ad market that buys itself. In conversations with AdExchanger and on the company's earnings calls, he has put a number on it: by 2028, he expects 25% of all digital advertising to be executed autonomously. Agents on the buy side, agents on the sell side, with humans setting the strategy and watching the dashboards. If that bet is right, the company that owns the pipes between those agents has a generational position.

PubMatic's recent investments line up with the prediction. The Activate platform routes demand directly to PubMatic supply with fewer intermediaries. The NVIDIA collaboration is the substrate. The Connected TV business - which crossed the 50%-year-over-year growth threshold (excluding political dollars) in late 2025 - is the channel that pays for the build-out while the agentic future arrives.

It is also the channel that justifies, finally, his long unfashionable preference for owning physical infrastructure. PubMatic operates its own data centers in an era where almost everyone is on hyperscaler cloud. Goel does not romanticize this. He runs the numbers on cost per query and decides accordingly. The numbers, lately, keep coming back his way.