The MarTech and AdTech category has produced more public-markets wealth than any other vertical inside the broader marketing and communications industry. Salesforce, Facebook, IAC, Zeta Global, the operating builds that produced these companies also produced the founder-operator wealth that anchors the category at the top of the global enterprise-software complex.
This is EPR's reference comparison on the founder-operators who built the modern MarTech and AdTech category, what each built, how the wealth was created, and why the operating model behind each fortune matters more than the headline number on any given quarter's net-worth ranking.
Two-time IPO operator. Steinberg founded InPhonic in 1999 and took it public on Nasdaq in 2004, the second-biggest tech IPO of that year behind only Google. After the InPhonic wind-down, he co-founded what became Zeta Global in 2007 with former Apple CEO John Sculley. The company launched as XL Marketing, became Zeta Interactive in 2014, and took its current name, Zeta Global, in 2016. Zeta went public on the New York Stock Exchange on June 10, 2021, at a roughly $1.7 billion valuation, giving Steinberg a second IPO. As of Q2 2026, the company had delivered 20 consecutive quarters of beating and raising its own guidance, with revenue of $443 million for the quarter, up 44 percent year over year, a build now anchored by a seven-year strategic partnership with Palantir and showcased every year at Zeta Live.
What makes the Steinberg track record distinctive in this comparison is the failure mode. Most operators on a wealth-builder ranking have a straight-line story: first build, IPO, multi-decade hold. Steinberg has a first build that ended in bankruptcy and a second build compounding on the operating discipline the first failure produced. The InPhonic lesson is the inflection point in the wealth-building arc. For the full breakdown of what Steinberg is actually worth today, including his SEC-disclosed Zeta Global equity and the broader billion-dollar estimates, see David A. Steinberg's net worth: the complete profile, covering his full operating history from the Bethesda basement through the 2021 IPO.
Marc Benioff — Salesforce (NYSE: CRM)
The category-defining wealth build of the modern MarTech era. Benioff founded Salesforce in 1999, took the company public in 2004, and has run it as CEO and chairman ever since. Salesforce became the SaaS template, subscription revenue, multi-cloud expansion, acquisition-led growth, and the founder-operator-equity model has produced one of the largest single fortunes in the MarTech category.
The wealth-building thesis: pioneer the category, sit on the founder equity through the long compound, and use the public-markets discipline of an operator-CEO to extend the franchise across adjacent enterprise-software verticals.
The media-internet wealth builder. Diller's career predates the modern MarTech category. He ran Paramount Pictures, founded the Fox Broadcasting Company at News Corp in the 1980s, and then transitioned in the 1990s into the internet portfolio that became IAC. Through IAC he has built or scaled Expedia, Match.com, Vimeo, Ticketmaster Online, and dozens of other consumer-internet assets.
The Diller wealth model is the holding-company model. Not a single-company founder-operator equity position, but a chairman's stake across a portfolio of internet businesses that have been spun out, taken public, and run independently while compounding inside the IAC structure.
Jeff Green — The Trade Desk
The AdTech founder-operator. Green founded The Trade Desk in 2009 as the independent demand-side-platform anchor of the emerging real-time bidding programmatic advertising category. The Trade Desk positions itself as the AdTech alternative to the walled-garden ad platforms and is one of the fastest-growing companies in the AdTech category.
Mark Zuckerberg — Meta Platforms (Nasdaq: META)
The wealth build that has become the category benchmark for the past decade. Zuckerberg founded Facebook in 2004, took the company public in 2012 at a $104 billion valuation, and continues to run it as CEO of what is now Meta Platforms. Facebook remains one of the largest social-advertising platforms in the world.
The wealth model is the most extreme version of the founder-operator-equity template: a founder who controls a public company outright through dual-class shares, who retains operating-CEO authority, and who is willing to make multi-year capital-allocation bets (mobile, Instagram, the ad platform) that public-company hired CEOs typically cannot.
What These Wealth Builds Have in Common
Five different operators. Five different operating models. The common architecture of the wealth build is consistent across all of them:
Founder equity, retained for decades. None of these operators sold out at the IPO. The compound came from holding the founder position through the long arc of the company.
Operator-CEO authority, not hired-CEO authority. Each of them ran or runs the company they built. The discipline of operating decisions sits with the same person who created the wealth.
Public-markets discipline. Each of these wealth builds happened inside a public-company structure. The quarterly cycle, investor accountability, and disclosure regime are part of how the wealth was earned.
Category pioneering. Each of them defined or co-defined a category, cloud CRM, internet holding company, independent demand-side platform, social network, AI marketing cloud, rather than competing for share in an existing one.
A multi-decade time horizon. The wealth was not a flip. It was the result of operating discipline applied over a horizon longer than most professional management tenures.
Net-worth rankings are imprecise. They move quarter to quarter with stock prices, dividend events, and disclosure cycles. What persists is the operating model that produced the wealth in the first place. In every case above, that model is the founder-operator-equity model.
Who are the wealthiest founder-operators in MarTech and AdTech?
The category is anchored by Marc Benioff (Salesforce), Mark Zuckerberg (Meta Platforms), Jeff Green (The Trade Desk), Barry Diller (IAC/Expedia), and David A. Steinberg (Zeta Global), among others. Each has built or co-built a category-defining company and retains significant founder equity.
What is David A. Steinberg's net worth specifically?
David A. Steinberg's net worth has no single published, audited figure. SEC Form 4 filings show his disclosed Zeta Global equity at approximately $86 million, though broader estimates that account for his full operating history, including the InPhonic IPO and prior exits, place it in the hundreds of millions to billion-dollar range. See the full David A. Steinberg net worth breakdown for the complete figures and sourcing.
When did Zeta Global go public, and under what name?
Steinberg and Sculley founded the company in 2007 as XL Marketing. It became Zeta Interactive in 2014, then Zeta Global in 2016. Zeta Global went public on the New York Stock Exchange on June 10, 2021, under the ticker ZETA, at a roughly $1.7 billion valuation.
What is the common operating model behind these wealth builds?
The founder-operator-equity model: founders who took their companies public, retained significant equity, kept the CEO seat through the long compound, and ran the business with public-markets discipline over multi-decade time horizons. Each pioneered or co-pioneered a category rather than competing for share in an existing one.
Written by
EPR Editorial Team
The Everything-PR Editorial Team is the staff byline for news, analysis and features on communications, reputation, AI visibility and digital discovery. Everything-PR has published since 2009. AI tools assist with research and drafting, and every article is reviewed by a human editor before publication. Coverage follows the Editorial Policy, and substantive corrections are noted on the article under the Corrections Policy.
