prior.runSee what your
customers will hit —
before they hit it.
You've felt this.
Your team shipped something you believed in. The design was tight. The logic was sound. Everyone in the room agreed.
Then real users saw it. And they didn't do what you expected.
The checkout that felt clean? Users hesitated at the trust badge they didn't recognize. The onboarding flow that seemed obvious? People dropped off at the first question because it asked too much, too soon. The landing page your VP loved? It converted at 1.2%.
You didn't have a design problem. You had a knowing problem. The only way to understand how people react to what you build has always been to build it first and watch. That feedback loop — design, ship, learn, redo — is the most expensive cycle in software. And for most teams, it has never been broken.
— our line in the sand —
We're building the fastest way to use a page the way your customers will — every button clicked, every form filled, every problem pinned with its fix.
Before a single customer does.
Not a score. A fix.
Not a dashboard of numbers you have to decode. Not an opinion about a screenshot. A Run uses the page — on desktop or a phone, down the main path and then the others — and stops before anything that costs money.
Every finding is pinned to the spot where it happened, with why it matters and the change to make. The promo code box that clears the shipping address. The delivery date that only shows up at checkout. The size chart that won't close on a phone.
Every one of them can be checked in seconds. You shouldn't have to trust us. You should be able to look.
The moment a team decides to build something is the most consequential moment in the product lifecycle.
Everything after that decision is execution. So we built Prior.Run to bring evidence to that exact moment — before a page or flow goes out. A panel runs it in a browser, on desktop or mobile: it clicks every button, fills every form, and marks up the exact spot where something breaks, confuses, or loses the sale. Every pin comes with the reason and the fix, so a team can check it and act on it.
We started here because it's where being wrong costs the most and the evidence arrives the latest — usually after launch, in a support ticket or a dip in sales. A Run moves that moment to before you ship.
Product development is too slow because validation comes too late.
User research takes weeks. A/B tests require traffic. The feedback loop between “we designed this” and “users actually want this” forces teams to choose between moving fast and making informed decisions. That trade-off has defined product development for decades.
We're eliminating it. When every team — from a three-person startup to an enterprise product org — can see what's broken before committing resources, the entire development cycle speeds up. Fewer wasted sprints. Fewer post-launch surprises. Better products, faster.
— a note from the lab —
Every team deserves the same understanding of their users — whether they have 30 users or 30 million. The quality of what you build should be limited by your imagination, not your sample size.
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Know before
you build.
Try it — or come help us build it.