Is ZETA a Buy? What to Consider in 2026
Short answer
The bull case for Zeta Global (ZETA) rests on Strong top-line growth: Zeta reported full-year 2025 revenue of about $1.31 billion, up roughly 30% year over year, and has described a long string of quarters that beat and raised guidance. Revenue (FY2025) is ~$1.31 billion (+30% YoY). If you believe that thesis holds, the real questions become position sizing and overlap, not timing. The main risk to that view: Zeta still reports GAAP net losses, including a full-year 2025 loss of about $31.5 million driven largely by roughly $178 million of stock-based compensation, so reported profitability lags the adjusted figures the company highlights, and ongoing equity grants dilute shareholders. Whether ZETA is a buy comes down to whether you believe the thesis. This is informational, not a recommendation, and Walnut is not an investment adviser.
Zeta Global operates the Zeta Marketing Platform, an omnichannel, data-driven cloud system that helps large enterprises run marketing across email, social, web, connected TV, and other channels. Its differentiator is the pairing of a very large proprietary consumer data set, the Zeta Data Cloud, with artificial intelligence and increasingly agentic AI that predicts customer behavior and activates campaigns in real time. The company makes money mostly through platform subscriptions tied to how much marketers use the system, plus integrated and political or advocacy media spend, so revenue scales as customers run more campaigns and adopt more channels. Zeta was built up by founder and chief executive David Steinberg, listed on the NYSE in 2021, and has grown both organically and through acquisitions, including the roughly $250 million purchase of identity and people-based marketing firm LiveIntent that closed in October 2024 and added a large hashed-email identity graph. In November 2024 short-seller Culper Research published a report titled "Shams, Scams, and Spam" alleging revenue round-tripping and questionable data-consent sourcing, which sent the stock sharply lower; Zeta rejected the claims as riddled with misrepresentations and held a webinar detailing its accounting, controls, and data practices. The business has continued to post strong results, reporting record full-year 2025 revenue of about $1.31 billion, up roughly 30%, with adjusted EBITDA near $285 million and free cash flow of about $165 million, while raising 2026 guidance.
What's the case for buying ZETA?
1. Strong top-line growth.
Zeta reported full-year 2025 revenue of about $1.31 billion, up roughly 30% year over year, and has described a long string of quarters that beat and raised guidance. For 2026 it raised revenue guidance to roughly $1.75 billion to $1.76 billion, implying about 34% to 35% growth. That sustained growth rate is the core of the bull case.
2. Data plus AI platform.
The Zeta Marketing Platform pairs a large proprietary consumer data set with machine learning and increasingly agentic AI to target, predict, and automate campaigns. Management positions AI as a way to win budget from legacy point tools and agencies and to lift gross margins. The LiveIntent deal added an identity graph of more than 235 million hashed email addresses to deepen that data advantage.
3. Improving profitability and cash flow.
Adjusted EBITDA reached roughly $285 million in 2025, up about 44%, and free cash flow grew about 78% to around $165 million, a margin near 13%. The company guided 2026 adjusted EBITDA to roughly $390 million. Rising adjusted margins and cash generation support the case that scale is translating into operating leverage.
4. Direct and accretive expansion.
Zeta has emphasized shifting revenue from lower-margin agency channels to higher-margin direct relationships, expanding into mobile, retail media, and political or advocacy spend. Acquisitions like LiveIntent are framed as accretive and as broadening the platform. If cross-selling and channel mix keep improving, the model can grow revenue per customer over time.
What are the risks to ZETA?
Zeta still reports GAAP net losses, including a full-year 2025 loss of about $31.5 million driven largely by roughly $178 million of stock-based compensation, so reported profitability lags the adjusted figures the company highlights, and ongoing equity grants dilute shareholders. Its data-sourcing and consent practices drew scrutiny after the 2024 Culper Research short report alleged round-tripping and questionable data collection; Zeta rejected the claims, but the episode highlighted reputational, regulatory, and litigation risk. It competes with far larger marketing clouds from Salesforce, Adobe, and Oracle as well as specialized customer-data and adtech players. Because much of its revenue tracks marketing and advertising budgets, results are sensitive to the macro ad-spend cycle, and the stock carries a high-growth valuation that leaves little room for disappointment.
How is ZETA valued? (as of FY2025 results and latest quarter)
- Revenue (FY2025): ~$1.31 billion (+30% YoY)
- Revenue growth: ~30% in 2025; ~34-35% guided for 2026
- Adjusted EBITDA: ~$285 million (+44% YoY)
- GAAP net loss: ~$31.5 million (incl. ~$178M stock-based comp)
- Free cash flow: ~$165 million (+78%, ~13% margin)
- Market cap: ~$4.7-5.0 billion (mid-2026)
A high-growth adtech or martech name like Zeta is usually read on revenue growth, adjusted EBITDA, and free cash flow rather than reported earnings, because GAAP results are weighed down by stock-based compensation, acquisition amortization, and other non-cash charges. The large gap between adjusted EBITDA near $285 million and a GAAP net loss is mostly stock-based compensation, which is real dilution even though it is non-cash, so it is worth watching alongside the adjusted figures. With roughly 30% growth, the stock tends to carry a growth premium, meaning the multiple assumes the high growth and margin expansion continue, and any slowdown or guidance cut can move the price sharply.
How do you decide if ZETA is a buy?
Rather than asking whether ZETA is a buy in the abstract, it tends to help to answer four questions:
- Thesis: do you believe the case above, and is it still true today?
- Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
- Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
- Overlap: check whether you already hold ZETA indirectly through an index or sector ETF before adding more.
For the full picture, see the ZETA stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about ZETA against your real portfolio and see your actual exposure before deciding.
The bottom line on ZETA
The bottom line: Zeta Global's story right now is Strong top-line growth, with revenue (fy2025) at ~$1.31 billion (+30% YoY). If you believe that narrative continues, the call is about sizing ZETA sensibly and checking overlap with what you own; if you doubt it (the risk: zeta still reports GAAP net losses, including a full-year 2025 loss of about $31.5 million driven largely by roughly $178 million of stock-based compensation, so reported profitability lags the adjusted figures the company highlights, and ongoing equity grants dilute shareholders.), it is not for you. Decide from the thesis, not the ticker. Walnut is not an investment adviser.
Build a basket around ZETA with Walnut
Use Zeta Global as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
Is ZETA a good stock to buy right now?
+
The case for Zeta Global right now is Strong top-line growth, with revenue (fy2025) at ~$1.31 billion (+30% YoY). If you believe that thesis holds, ZETA is a way to own it and the real questions are sizing and overlap, not timing; the main risk to that view is zeta still reports GAAP net losses, including a full-year 2025 loss of about $31.5 million driven largely by roughly $178 million of stock-based compensation, so reported profitability lags the adjusted figures the company highlights, and ongoing equity grants dilute shareholders. So it comes down to whether you believe the thesis. Walnut is not an investment adviser and this is not a recommendation.
What does Zeta Global do?
+
An AI-powered marketing-technology company whose Zeta Marketing Platform pairs a large proprietary consumer data set with artificial intelligence to help enterprises acquire, grow, and retain customers across channels.
What are the main risks of ZETA?
+
Zeta still reports GAAP net losses, including a full-year 2025 loss of about $31.5 million driven largely by roughly $178 million of stock-based compensation, so reported profitability lags the adjusted figures the company highlights, and ongoing equity grants dilute shareholders. Its data-sourcing and consent practices drew scrutiny after the 2024 Culper Research short report alleged round-tripping and questionable data collection; Zeta rejected the claims, but the episode highlighted reputational, regulatory, and litigation risk. It competes with far larger marketing clouds from Salesforce, Adobe, and Oracle as well as specialized customer-data and adtech players. Because much of its revenue tracks marketing and advertising budgets, results are sensitive to the macro ad-spend cycle, and the stock carries a high-growth valuation that leaves little room for disappointment.
What does Zeta Global do?
+
Zeta Global runs the Zeta Marketing Platform, an AI-powered, data-driven cloud system that helps large enterprises run marketing across email, social, web, connected TV, and other channels. It combines a large proprietary consumer data set with machine learning to target, predict, and automate campaigns, and it earns money mainly through platform subscriptions tied to usage plus integrated media spend.
Does ZETA pay a dividend?
+
No. Zeta Global does not pay a dividend. The company reinvests in its platform, data, acquisitions, and growth, so any return to shareholders currently depends on share-price appreciation rather than dividend income.
How does Zeta Global use AI?
+
AI is central to Zeta's platform. It uses machine learning over its proprietary Zeta Data Cloud to predict customer behavior, score audiences, personalize messages, and optimize campaigns in real time, and it has been expanding toward agentic AI that can automate more of the marketing workflow. Management frames AI as the way it wins budget from legacy tools and improves margins.
What was the Zeta Global short-seller report about?
+
In November 2024, Culper Research published a report titled "Shams, Scams, and Spam" alleging revenue round-tripping and questionable data-consent and sourcing practices, which sent the stock sharply lower. Zeta rejected the report as riddled with misrepresentations and false statements, said the named partners were not material to revenue, and held a webinar detailing its accounting, controls, and data practices. The episode highlighted reputational and data-practice scrutiny investors continue to weigh.
Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell ZETA; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.