We talked with a CEO recently who has been steadily building a successful company in a specific vertical market for fifteen years. That success isn’t just measured in revenue, it’s a reputation, brand trust, a word-of-mouth network, partnerships, and a go-to-market engine that’s been exquisitely tuned to one context.
Then the conversation shifted to a very real TAM problem. Their niche market has a ceiling, and they can see it looming in the distance. So new verticals have made an entrance into strategic conversations.
Hot take: a tuned GTM engine is an asset until the moment you try to take it somewhere else. Without asking a few questions they haven’t thought to ask yet, they’re likely heading toward a very expensive lesson.
A Company Doing Everything Right
This company has a lot going for them. Four consecutive years of growth. A few noteworthy competitors are already playing in the adjacent verticals they’re eyeing, which validates the demand. They’re also prepping a new platform launch that gives them more flexibility than they’ve ever had.
By most measures, the timing is right and the rationale is sound.
When we started asking the diagnostic questions, the answers got murky fast.
- How does your ideal customer profile (ICP) translate to a buyer operating under completely different requirements and procurement dynamics?
- What does your positioning sound like to someone who’s never heard of you?
- Where do you show up when an AI system gets asked to recommend a solution in this new vertical?
That murkiness is the point. This isn’t a company that’s done something wrong. It’s a thriving company about to make a multi-year bet on a new market while carrying assumptions about their GTM engine that haven’t been pressure-tested for the new context.
What Fifteen Years Of Success Actually Built
When a company dominates a niche vertical long enough, the GTM engine gets extraordinarily good at operating in that context. The word-of-mouth network, the trade show presence, the review site profiles, the partner relationships, the competitive positioning built against specific alternatives your buyers actually know — all of it compounds over time.
The thing about compounding advantages is that they become invisible. They’re the water you swim in. You stopped noticing them years ago because they just work.
Step into a new vertical and you’re a stranger. A well-resourced, capable stranger…but a stranger to the buyers there, to the ecosystem dynamics, and to the competitive alternatives they’re actually choosing between.
The reputation you’ve spent fifteen years building means nothing to a buyer who has never heard of you and has no reason to care yet.
Most companies entering a new vertical understand this intellectually. What they tend to underestimate is how much of their GTM success was context-specific, and how little of it transfers automatically.
The ICP Problem Hiding In Plain Sight
Here’s where the risk compounds in a way that isn’t obvious.
Companies entering a new vertical usually assume their ICP is going to translate easily. They have a detailed profile. They know their buyer — the title, the org size, the trigger events, the objections. They built that profile through years of real deal cycles and actual customer conversations.
The problem is that a highly calibrated ICP is also a highly specific one. It was shaped by the signals, language, and buyer dynamics of one vertical. Carry it into a new market and it becomes a liability. It can quietly distort the copy you write, the titles you target, the objections you optimize for, and the competitive framing you lead with.
The companies that navigate vertical expansion well treat the ICP as a starting hypothesis in the new market, not a transferable asset. They do their homework talking to buyers in the new vertical, mapping the competitive dynamics, and understanding how decisions get made.
The companies that struggle skip that step and find out they were wrong six to twelve months in, when pipeline conversion isn’t materializing and nobody can explain why.
The New Visibility Gap Most Expansion Plans Don’t Account For
There’s a consequential third dimension to this that most companies making a vertical bet aren’t thinking about yet.
In a market you’ve worked for fifteen years, there’s an enormous body of contextual evidence accumulated around your company. Review site profiles, trade publication mentions, conference speaker credits, partner content, case studies, customer testimonials from recognized institutions in the space. This is an evidence layer AI systems draw on when deciding who to recommend when a buyer starts chatting with an AI assistant about a problem you solve.
You built that evidence layer over time, and you probably didn’t think about it as a strategic asset. It was the natural byproduct of operating in one market long enough.
In the new vertical, none of that contextual evidence exists. LLMs aren’t going to organically make the connection that your solution is also applicable to different market contexts. You have to start (early) feeding those connections to them.
According to Forrester’s 2026 Buyers’ Journey Survey of nearly 18,000 global business buyers, generative AI and conversational search are now the most meaningful source of vendor research, outranking vendor websites, product experts, and sales reps.
The brands that show up in those answers are the ones with years of owned content and third-party evidence in that space. Your competitors who’ve been there for five or ten years have it. You’re starting from zero — not just on brand awareness, but on the evidence layer that AI systems use to evaluate whether to recommend you at all.
Vertical expansion plans almost never account for this. Investments in new verticals tend to focus on sales headcount, marketing spend, and product adaptation. The question of whether the company is legible to buyers in the new vertical — including the AI systems influencing shortlists before a sales conversation ever happens — tends to go unasked until the pipeline data forces it.
What Ready Actually Looks Like
The company we talked with isn’t doing anything wrong. They have a plan, resources, and real momentum. The move into a new vertical makes sense.
The question worth pressure-testing before resources are allocated is whether the GTM engine is actually ready to operate in a new context, and what needs to be true before it is.
A working GTM engine in your existing market proves one thing: it works in that market. Whether the ICP holds, whether the positioning lands on unfamiliar buyers, whether the evidence base exists to support AI visibility in the new space — those are separate questions.
The growth diagnostic work still needs to happen. It’s just scoped to the expansion rather than the existing business.
The companies that move efficiently in new verticals are usually the ones who asked those questions before they committed resources. The ones who spend three years figuring out why the revenue won’t follow them tend to be the ones who assumed success would transfer and skipped the homework.
The Starting Point
The assumptions we’re describing tend to surface one of two ways: in a structured diagnostic before resources are allocated, or in the struggling pipeline that comes twelve months later.
If you’d rather find out the first way, a free, 30-minute Clarity Call is the starting point. From there, Fathom360, our structured GTM diagnostic, surfaces what’s actually ready to transfer and what needs work before the expansion motion begins.
Common Questions
What are the risks of expanding into a new vertical when your current GTM is working well?
A working GTM engine in one vertical is highly optimized for that context — the buyers, the competitive dynamics, the word-of-mouth network. When a company enters a new vertical, that engine doesn’t transfer automatically. The ICP may distort execution, the positioning may land flat on unfamiliar buyers, and the evidence base AI systems use to recommend vendors starts at zero.
How do you know if your ICP will work in a new vertical?
A well-built ICP is shaped by the signals, language, and buyer dynamics of the vertical where it was developed. In a new market, that specificity becomes a liability — quietly distorting copy, targeting, and competitive positioning until pipeline data reveals the mismatch. The only way to know if it transfers is to treat it as a hypothesis and stress-test it through primary research before the GTM motion begins.
