You're head of go-to-market at a B2B software company in São Paulo. Sales wants to chase big corporate logos —prestige, enormous contracts. But your data shows you win and retain far better in a specific mid-market segment. The question isn't who you'd like to sell to, but where you actually win. Atlassian and HubSpot grew by serving an underserved segment well, not by hunting whales.
The situation
The ideal customer profile (ICP) isn't whoever you wish would buy, nor everyone who can buy: it's the segment where you win most easily and the customer gets the most value, defined by evidence: close rate, retention, expansion, customer acquisition cost (CAC) payback. The more you focus your resources on that segment, the better every marketing and sales dollar converts.
Here are the two traps. Chasing aspirational big logos —the whales— usually brings low close rates, sky-high CAC, and more churn: you win the logo and lose money. Selling to everyone dilutes the message, the product, and the team: without focus, you don't fit anyone. The defensible answer is to let the evidence define the ICP —where you truly win and retain— and concentrate there, as Atlassian (self-serve for teams) and HubSpot (marketing SMBs) did before moving upmarket, much later, toward large accounts.