Most companies guess their ICP
Founders write ICPs like they write personal essays: optimistic descriptions of who they wish bought from them, not who actually does. The real ICP lives in your closed-won deals, the language on your homepage, and the case studies you ship.
The ICP builder collapses three days of GTM workshops into ten seconds by reading what you've already said publicly. It's a starting point, not a verdict, but it beats a blank doc.