Stunt Double’s actors drive a real browser through your product, prototype or Figma design, and show you where your customers will get stuck, by this afternoon.
Free to try, no sign-up needed.
Point Stunt Double at a question about your product and get an answer you can act on today.
Put a prototype, a flow or a headline in front of actors in minutes and see where they stall, long before you commit engineering time to it.
Every change is checked against your requirements automatically, with the screenshot and the plain-language reasoning behind each pass and fail.
Optimise toward the outcome you care about, then see exactly what moved it, so you iterate on evidence instead of opinion.
A cast of users browses from the regions, devices and locales you serve, surfacing the friction you would never hit on your own setup.
Interviews before you build, checks on every change, optimisation once it is live: three stages, one cast.
Open any result and you get the step, the screenshot and the plain-language reasoning behind each pass and fail. Nothing arrives as a score with nothing behind it.
This one is a checklist run on Parlour, a demo booking app. Two checks passed; the deposit and refund terms were not stated before payment, so the run failed.
Some of what goes through your signup, checkout or booking flow is already an agent acting for a person: a shopping assistant, a browser agent, an automation filling the form. It reads your labels, follows your focus order and gives up on the same steps a screen reader does. Nobody is watching it try.
An actor is an agent driving a real browser. Give it the task an assistant would be given, and watch it attempt your flow: every page, every field, and the step where it stops.
Every run is a sequence you can read: the pages it opened, the actions it took, the decisions it made and the moment it gave up, with a screenshot at each step. Put a checklist in the deploy loop and it runs on every change.
The fixes are mostly the same ones that help a screen-reader user: labels that say what a control does, selection that is announced, costs shown before commitment. One round finds them for people and agents at once.
Runner is your on-call assistant. Ask in plain language and it casts actors, builds checklists, runs automations and finds answers, then takes you straight to the result.
Runner knows every corner of the app and does the work for you, rather than only answering the question.
No forms or menus. Say what you want and Runner works out the steps.
Creates actors, checklists, interviews and automations for you, rather than telling you how.
Sees the page you’re on, so "debug this run" or "fix this check" needs no more context.
⌘I opens Runner from anywhere, ready for whatever’s next.
Ask from Slack, drive a run from Claude, and land the findings in Linear as issues your team can pick up.
Create your first actor in minutes.
Plans from $9 a month, self-serve, no sales call. See pricing