A Crowd Sandbox
for your ideas.

That specific silence after you hit publish? We've been there. Whether it's a new product, a risky tweet, or a big campaign.

Staring at the screen, wondering if you missed the mark. It's the most expensive feeling in creativity.

We built Brook because we were tired of guessing. We didn't want an AI cheerleader to tell us "Good job"; we wanted the truth.

So we aggregated 12M+ historical patterns of what actually worked in the wild—not to generate more text, but to understand human behavior.

This is the tool we wish we had.