GEO · 6 min read
B2B SEO in 2026: does AI really build the shortlist? We read every study
B2B SEO in 2026: G2 says AI builds buyer shortlists, 6sense says it rarely discovers vendors. We read every study. Here's what the data means for you.
On this page — 8 sections
Half of B2B software buyers now start their research in an AI chatbot more often than in Google, according to G2’s Answer Economy survey of 1,076 buyers. And 69% say a chatbot steered them to a different vendor than they’d planned. Read that and you’d rebuild your whole B2B SEO plan around ChatGPT by Friday.
Then 6sense’s 2026 study of 4,611 buyers, which included the UK and Ireland, lands in the same autumn and says only 26% use AI to discover vendors at all. Buyers pick the vendor they already favoured 82% of the time.
Both can’t be the whole truth. So we read the main studies side by side, worked out why they disagree, and landed on a position: AI decides who makes the shortlist, not who wins it. Here’s the evidence, and what it means for B2B SEO this year.
What the studies actually say
The four studies most quoted in B2B marketing this year measure different things, which is why their headlines clash.
| Study | Who was asked | Headline finding | Worth knowing |
|---|---|---|---|
| G2, The Answer Economy (Mar 2026) | 1,076 B2B software buyers | 51% start research in a chatbot more than Google; 69% changed vendor after chatbot advice | Software buyers only. G2 sells reviews, and review sites came out as the top trust signal |
| Gartner (fieldwork Aug to Sep 2025) | 645 B2B buyers | 45% used generative AI in a recent purchase; 69% validate AI insights with a sales rep | Older fieldwork; asks about one specific purchase |
| Semrush (Mar to Apr 2026) | 519 US professionals who use AI at work | 92% say AI shaped their shortlist; 45% say significantly | Only people who already use AI at work; an impression, not a measurement |
| 6sense (Nov 2026) | 4,611 recent B2B buyers, incl. UK and Ireland | 81% used an AI model somewhere; only 26% to discover vendors; the winner was on the first list 92% of the time | Sells intent data that benefits from “be known early” |
Why they disagree
The gap comes down to three things: who was asked, what they were asked, and who paid for the research.
Who was asked. G2 surveyed software buyers, a group that adopts new tools early and buys in categories crowded with vendors. 6sense surveyed buyers across industries, including plenty buying things where relationships and procurement rules dominate.
What was asked. “Do you start research in a chatbot?”, “Did AI shape your shortlist?” and “Did AI introduce you to a vendor you didn’t know?” are different questions. A buyer can start in ChatGPT, have it reorder a list they’d already half-formed, and still buy from the supplier they met at a trade show last year. All three surveys would record that buyer differently.
Who paid. G2 makes money from reviews, Semrush from search and AI visibility tools, 6sense from intent data. None of that makes the numbers wrong. It does mean each report’s conclusion happens to suit its publisher, so read the method before the headline.
Our read: AI decides who’s on the list, not who wins
Put the studies together and a consistent picture appears. Buyers use AI to sort, compare and check what they already half-know. They lean on it hardest when comparing vendors: comparing strengths and weaknesses is the top chatbot use case in G2’s data, cited by 41%. But the decision still runs through people. Gartner found buyers use an average of seven information sources and that most want a rep to validate what the AI told them.
The part every study agrees on is the cost of being missing. 6sense puts a vendor’s chance of winning at under 10% if it isn’t on the buying group’s initial list. If an assistant builds or trims that list and leaves you off, no amount of sales effort later gets you back in the room.
So AI visibility is a qualifying round rather than the final. You have to get through it, but getting through it doesn’t win the deal.
What this means for B2B SEO in 2026
B2B SEO now has two jobs: make sure AI includes you when buyers compare options, and make sure what it says is accurate enough to survive a sales conversation.
- Publish the comparison before someone else does. “[Your category] alternatives”, “X vs Y” and “how to choose a [category] supplier” pages are exactly what buyers ask assistants to produce. If your version is the clearest and fairest, it’s the one that gets quoted.
- Treat review platforms as part of SEO. G2’s buyers named review-site citations as the signal that most increases their confidence in an AI answer. Discount that for who’s saying it, and it’s still consistent with every citation study we’ve seen. A thin profile on the review site your category uses is a gap in your visibility.
- Make your site the place facts get checked. If buyers validate AI answers with reps, your reps and the assistants should be working from the same facts: pricing ranges, integrations, security and compliance pages, implementation timelines. Gating all of that behind a demo form means the AI fills the gap with someone else’s guess.
- Build the brand between purchases. 6sense found buyers keep up with vendors between buying cycles and arrive with preferences already formed. Thought leadership, events, LinkedIn and trade press now do SEO work: they put your name in the training data and in the buyer’s head before the search starts.
- Answer the early-stage problem questions. Semrush found 72% of AI-using buyers use it while scoping the problem or the category. Content that defines the problem well, with numbers and examples, is how you enter the conversation before the shortlist exists.
- Measure inclusion, not just rankings. Track 20 to 50 “best [category] for [situation]” prompts every month across ChatGPT, Gemini, Copilot and Perplexity. Record whether you’re named, how you’re described and who’s named alongside you.
What to stop doing
Stop publishing broad top-of-funnel posts that any assistant can summarise in two lines without sending a click. Stop hiding basic facts behind forms. And stop reporting B2B SEO purely on rankings and traffic, because a large share of the influence now happens inside answers you can’t see in GA4.
The UK angle
Most of this research is global or American, but the UK isn’t far behind. The ONS found 51% of UK businesses with 250 or more employees used at least one AI technology in September 2026, up 32 percentage points in three years. The people buying from you are increasingly using the same tools at work every day.
FAQs
Do B2B buyers use ChatGPT to find suppliers?
Many do, but fewer than the headlines suggest. G2 found 51% of software buyers start research in a chatbot more often than in Google. 6sense’s broader 2026 study found 81% of buyers used an AI model during a purchase, but only 26% used it to discover new vendors. Most use it to compare and validate options they already know.
Is B2B SEO still worth investing in?
Yes, because assistants and Google’s AI Overviews draw heavily on pages that are already well indexed and trusted. What’s changed is the target: being included and described accurately in AI answers now matters as much as ranking, so B2B SEO should cover comparison content, review platforms and factual product pages as well as traditional rankings.
How do I get my company onto AI-generated shortlists?
Be easy to identify and easy to verify. That means consistent company information across the web, clear comparison and pricing pages, strong review profiles on the platforms your category uses, and independent mentions in trade press and communities. Then track a fixed set of buyer prompts monthly to see whether you’re named.
Want to know if you’re making the shortlist?
Start with our 40-point AI visibility audit, or read how we approach generative engine optimisation and B2B demand generation.
Require AI SEO, GEO, or digital marketing and AI automation within your business? Book a free appointment with a senior consultant.
