How LLMs Change the B2B Marketing Funnel
Marketing has run on a simple assumption for twenty years: control the content, control the funnel. That assumption is gone.
Look at what actually changed, stage by stage.
Learn: the ebook becomes ask-the-LLM.
Discover: the Google search for "top vendors in X" becomes ask-the-LLM for a recommendation.
Evaluate: the one-pager and the sales call become ask-the-LLM for an analysis.
Select: the single vendor-curated reference call becomes public, uncurated proof — G2, Reddit, LinkedIn, whatever came up in the hallway at the last event.
Four stages a marketing team used to own, four replacements, and marketing wrote none of the new material.
Customers did.
That's the part most funnel dashboards haven't caught up to. Customers fuel G2, Reddit, and LinkedIn. Those fuel the LLM. The LLM fuels the buyer experience for the next prospect in line. Buyer experience and customer experience used to be two funnels with a handoff between them, marketing on one side, customer success on the other. They're the same funnel now, feeding each other in a loop. Engage customers well and you're writing the training data for your own top of funnel. Let a customer have a bad experience and you're doing the same thing in reverse.
That loop is also why forms and static MQLs are losing ground to product usage and dynamic signals as the qualification data that actually matters. A form fill was never a signal of anything except that someone was willing to trade an email for a PDF. Product usage is a signal of whether the thing you sold is working. The LLM layer already treats it that way, whether or not your MQL model does.
Here's the part that should change how marketing teams operate, not just how they report. The contract signer was never the only person whose experience mattered, but in the old world, you could get away with treating them that way. If one user at a customer never fully onboarded, or had a rough time with the product, that stayed contained. It showed up in a CSM's notes, maybe, and inbound kept working fine because that user's bad week never outranked the case study you published. The account team could absorb it.
It doesn't stay contained anymore. That user's experience is now the kind of thing that ends up in a Reddit thread, a G2 review, a comment on a LinkedIn post, and any of those can end up folded into the answer an LLM gives the next buyer evaluating you. The stakes moved from the account level down to the individual seat, and most marketing orgs are still built to measure and manage at the account level.
Which means the highest-leverage marketing motion right now might not be a campaign at all. It's product onboarding, adoption, engagement, and usage, tracked at the user level, because that's the layer the rest of the funnel now gets built on top of.
The loop runs whether you're managing it or not. The only real question is whether you're feeding it on purpose.
