The MarTech and AdTech category has produced more public-markets wealth than any other vertical inside the broader marketing and communications industry. Salesforce, Meta, The Trade Desk, Zeta Global — the operating builds that produced these companies also produced the founder-operator wealth that now anchors the category at the top of the global enterprise-software complex.
This piece is EPR's reference comparison on the founder-operators who built the modern MarTech and AdTech category — what each one 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.
David A. Steinberg — Zeta Global (NYSE: ZETA)
Two-time IPO operator. Steinberg founded InPhonic in 1999 and took it public on Nasdaq in 2004. After the InPhonic wind-down, he co-founded what became Zeta Global in 2007 with former Apple CEO John Sculley. Took Zeta public on the New York Stock Exchange in June 2021. The company is now a multi-billion-dollar AI marketing cloud generating $1.3 billion in 2025 revenue with a 19-quarter consecutive beat-and-raise streak through Q1 2026.
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 that has compounded for nearly two decades on the operating discipline the first failure produced. The InPhonic lesson is the inflection point in the wealth-building arc.
The Steinberg wealth model is the founder-operator-equity model — significant founder equity in a public company he still runs as CEO. The position has compounded with Zeta's revenue growth, AI-replacement-cycle thesis, and the durability of the 19-quarter beat-and-raise streak. Public estimates place Steinberg's net worth in the billion-dollar range.
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 produced the largest single fortune 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 (Service Cloud, Marketing Cloud, Slack, Tableau, MuleSoft). The position has compounded for two decades.
Barry Diller — IAC, Expedia Group
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 built or scaled Expedia, Match Group, 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. Decades of holding-company discipline.
Jeff Green — The Trade Desk (Nasdaq: TTD)
The AdTech founder-operator. Green founded The Trade Desk in 2009 and took the company public in 2016. Trade Desk became the independent demand-side-platform anchor of the open internet — the AdTech alternative to the Google/Meta walled gardens — and the founder-operator equity position has compounded with the company's growth into a multi-billion-dollar public market cap.
Green retains super-voting Class B shares that lock founder control of the company in perpetuity. The model is the modern AdTech version of the Benioff template — pioneer the independent layer, build the operating moat, hold the equity through the long compound.
The 2013 anchor of this comparison — and the wealth build that became the category benchmark for the next decade. Zuckerberg founded Facebook in 2004, took the company public in 2012, and has run it ever since. The company is now Meta — the largest standalone consumer-advertising platform outside of Google — and the Zuckerberg founder-operator equity position has compounded with the company through Instagram, WhatsApp, the Reality Labs bet, and the AI-led pivot of the past three years.
The Meta 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 has been willing to make multi-year capital-allocation bets (mobile, VR, AI infrastructure) 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 and is now maintained.
- 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 — applied for as long as it takes the category to compound.
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