For most of the last two years, the working assumption in B2B marketing was that third-party cookies were dying and first-party data vs third-party data was a question with an obvious answer: build your own or get left behind. That assumption needs updating. Google abandoned its plan to force out third-party cookies in Chrome, first backing off the hard deprecation in mid-2024, then in April 2025 confirming it wouldn’t deprecate them at all, and more recently dropping even the softer plan for a user-facing “choice” prompt. Chrome, which still runs a majority of the browser market, is keeping cookies around. That changes the practical calculus for B2B teams, even if it doesn’t change the underlying case for first-party data.
What actually changed, and what didn’t
Safari and Firefox still block third-party cookies and cross-site tracking by default, and have for years, which means something close to half the web was already effectively cookieless before Chrome’s reversal. Chrome’s decision doesn’t restore the old targeting environment; it just means the transition is partial and browser-dependent rather than a hard cutoff on a fixed date. For a B2B marketer running ads or retargeting, that means third-party cookie-based tracking still works on some traffic and not on other traffic, depending on which browser a given prospect uses, which is arguably messier to plan around than a clean deprecation would have been.
What hasn’t changed is the underlying trust and quality gap between the two data types. First-party data, information someone gives you directly through a form fill, a demo request, a product sign-up, is data the person chose to share, which makes it both more accurate and easier to justify under GDPR and CCPA than data aggregated by a third party without direct consent. Third-party data still does something first-party data structurally can’t: it reaches people who haven’t engaged with you yet. A first-party dataset is capped at your existing funnel; it can’t tell you who’s in-market at a company that’s never visited your site.
Why first-party data matters more now, cookies or not
The strongest argument for first-party data in 2026 isn’t really about cookies anymore, it’s about AI. Personalization engines, predictive lead scoring, and AI-driven segmentation all perform better on clean, unified first-party data than on inferred third-party attributes, because the training signal is more reliable. A CDP like Salesforce Data Cloud or HubSpot’s data hub exists specifically to stitch together the first-party signals scattered across a CRM, a product, a support tool, and a website into one record per account, and that unified view is what makes AI-driven scoring and personalization usable rather than noisy.
The gap here is less about whether to collect first-party data (every B2B team already does, to some degree) and more about whether it’s unified and activated. A demo request in Salesforce, a product usage event in the app, and an email click in the ESP are all first-party data, but if they live in three disconnected systems, they’re not much more useful than third-party data bought off a list. Unification, not collection, is where most teams are actually behind.
Where third-party data still earns its budget
Intent data providers didn’t go away, and for the specific job of finding accounts that are in-market before they’ve raised a hand, they’re still the more practical option. Pricing varies widely by tier: Cognism and ZoomInfo typically start around $15,000 to $20,000 a year, while Bombora runs $25,000 to $100,000 depending on scale, and 6sense’s median contract sits around $63,000. A meaningful number of these platforms, including 6sense, Cognism, and Demandbase, license Bombora’s underlying surge data and layer their own scoring or activation on top, so paying more for a different vendor doesn’t always mean a different dataset underneath.
Orchestration tools like Clay sit in a different spot: rather than selling proprietary intent data, Clay pulls signals from whichever providers you’re already paying for (intent data, firmographic enrichment, even scraped job postings) and combines them with your first-party CRM data in one workflow. That’s less a third-party data source in its own right and more a way to make the third-party data you already have actually usable alongside what you’ve collected directly.
The practical blend for 2026
Teams treating this as an either-or question are mostly asking the wrong thing. The realistic pattern for 2026 is layering: a unified first-party foundation (via a CDP or a well-integrated CRM and product-analytics stack) for the accounts and contacts you already know, with third-party intent signals bought in to extend reach to accounts that haven’t engaged yet. First-party data tells you who’s ready to buy among people you already know; third-party data tells you who to go find. Using one without the other either caps your addressable market at your existing funnel or means spending on outreach with no signal about who’s actually paying attention once you reach them.
If cookie policy and tracking mechanics are the part you’re trying to get ahead of specifically, our breakdown of what cookieless tracking actually means for ad spend goes deeper into the measurement side of this shift. And if the immediate problem is that first-party data is scattered across systems rather than unified, that’s a lifecycle and automation problem as much as a data one, which our look at lifecycle marketing automation tools covers from the activation side.
What to actually do about it
Start by auditing whether your first-party data is actually unified or just collected. If a demo request, a pricing-page visit, and a support ticket for the same account live in three places that don’t talk to each other, fix that before spending anything on new third-party sources, since the return on intent data is much lower if you can’t act on it inside a coherent account view. Once that foundation is in place, third-party intent data is worth layering in specifically to extend reach beyond your existing funnel, not as a replacement for data you should be collecting directly. And don’t build a 2026 plan around an assumption that third-party cookies are going away on a fixed timeline. They’re not, at least not in Chrome, and betting your targeting strategy on a deprecation date that keeps moving is a worse plan than building around the data you actually control.