Your Ideal Customer Profile is the single input that quietly decides whether outbound works. Get it sharp and everything downstream, who you source, how you score, what you say, gets easier. Get it vague and you'll burn time and goodwill reaching the wrong people. Here's how to write one that converts.

Why most ICPs are useless

A typical ICP reads like a market: "B2B companies that want to grow." That's not a profile, it's a wish. A useful ICP is narrow enough that you could look at a person and decide, in two seconds, whether they're in or out.

The four layers of a real ICP

Firmographics, industry, company size, stage, geography. Be specific: "Series A-B B2B SaaS, 10-200 employees, US/UK."
The role, the exact person who feels the pain and can act. Founder, Head of RevOps, VP Sales, not "decision-makers."
The trigger, what makes them need you now: a raise, a new hire, a tool switch, a growth signal. This is the part most people skip and the part that drives reply rates.
Exclusions, who looks right but isn't: too small to pay, wrong region, a competitor, an industry you can't serve.

Start from your best customers

If you already have a few happy customers, reverse-engineer them. What did they have in common before they bought? What was happening in their business when they signed? Those patterns are your ICP, grounded in reality, not guesswork.

If you're pre-customers

Form a hypothesis and keep it tight. It's better to be precisely wrong and learn fast than vaguely right and learn nothing. Pick one segment, one trigger, one role. Reach 50 of them. Read the replies. Adjust.

A simple template

"[Role] at [company type, size, stage] in [geography], who [recent trigger]. Not [exclusions]." For example: "Heads of RevOps at Series A-B US SaaS companies that posted SDR roles in the last 30 days. Not agencies, not sub-10-person teams."

Let the ICP drive everything

A good ICP isn't a slide you write once. It's the spec your sourcing, scoring, and messaging all run against. In Sigora, you describe your buyer in plain language and it becomes the engine: it sources people who match, scores them by how strongly they fit and how active the trigger is, and tailors each message to that specific person and moment. The sharper your ICP, the better everything that follows.