Long-term by design.

The design system they built has survived two product managers, four engineers, and a complete rebrand. That's the only durability test that matters.

They came in at week six with a prototype that outperformed our entire in-house design review process. Research into testable UI, faster than I've ever seen it happen.

We'd worked with three agencies before Popaya. None of them understood the actual problem we were solving. These guys did — on the first call.

The mobile app has a 4.8 star rating after 10,000 reviews. That doesn't come from assumptions — it came from them testing with real users before writing a line of production code.

Sprint planning used to start with an hour of 'which version of this component do we use.' That conversation no longer exists.