Most B2B marketing revenue doesn't come from discovery. It comes from people who already know you.

There's a pattern that shows up in the first year of any B2B marketing consultancy. You win work. You trace where it came from. Every deal connects to a person you knew before you started.

This isn't a failure of demand generation. It's the actual mechanism of B2B buying, and most marketing strategy is built around a different mechanism entirely.

The channel that doesn't show up in attribution

When I went independent, the revenue didn't arrive through organic search or LinkedIn impressions or a well-structured funnel. It came from people who had seen me do the work at Redgate, or Syskit, or who knew someone who had. Former colleagues. Former vendors. People I'd sat across a negotiation table from.

Word of mouth. Specifically, warm professional relationships accumulated over years, now surfacing as inbound interest without any UTM parameter attached.

This is a problem for measurement. There's no attribution model that catches the moment a former colleague mentions your name in a conversation at a conference. The channel is invisible. The effect is real.

What it means structurally is that the early revenue of almost any B2B professional services business is a lagged return on trust built somewhere else, years earlier. You're drawing on a balance you didn't know you were building. The question is what you're doing now to accumulate the next layer.

The same dynamic runs inside companies, not just consultancies

This isn't unique to independent practitioners. The same pattern appeared when I was building out the marketing function at Redgate between 2017 and 2021.

The deals that closed fastest, with the least friction, were almost always with buyers who had prior contact with someone at Redgate: a developer who'd used the tools, a DBA who remembered the name from a forum, a buyer whose team had evaluated us two years before and not bought. The relationship layer did work that no campaign could replicate.

The mistake most B2B marketers make is treating this as background noise, not as the actual mechanism. Relationship-mediated buying isn't a soft benefit that sits alongside the "real" marketing. For most B2B businesses, it's the plurality of revenue. Everything else is supporting infrastructure.

This connects directly to how I think about the loyalty stage of the marketing lifecycle. Post-purchase engagement isn't a retention tactic. It's lead generation for the next deal, with a different buyer, somewhere else. The B2B revenue loop closes through advocacy, not acquisition.

What this means for how you build

If relationship-mediated revenue is the dominant mechanism, then marketing's job isn't primarily to create awareness in strangers. It's to create and maintain the conditions under which relationships form and compound.

That means customer councils, not just case studies. It means regular contact with buyers who didn't convert, not just with buyers who did. It means field marketing that puts your people into rooms where future relationships start, years before a deal is on the table.

It also means taking seriously the visibility problem in AI-mediated discovery. When a warm contact recommends you, the next thing the buyer does is look you up. What they find, including what AI systems say about you, either confirms the recommendation or undermines it. I've written about how brand affects what AI systems believe about you and it's the same problem: trust has to be legible outside the relationship, not just inside it.

None of this is a reason to stop investing in content or search or paid. Those channels find buyers who don't know you yet, and some of them become the relationships that matter five years from now. The mistake is treating discovery as the primary mechanism and relationship as the lucky side effect. It's the other way around.