A stand-in for your users, at every stage
Cast lifelike users, point them at your product, and get evidence-backed answers in minutes. Here is everything Stunt Double does, from first interview to validation on every change.
Cast any role
Real browser sessions. Real inboxes. Real credentials.
Bringing synthetic research and agentic AI together for an authentic user experience that’s genuinely scalable.
Ask your Runner
Runner is your co-pilot on every page. Ask in plain language and it casts actors, builds checklists, runs automations and finds answers, then takes you straight to the result.
Just ask, and it’s done
Runner knows every corner of the app and does the work for you, not just answers the question.
Skip the busywork
No forms or menus. Say what you want and Runner works out the steps.
Gets it done for you
Creates actors, checklists, interviews and automations, not just answers about them.
Understands your context
Sees the page you’re on, so "debug this run" or "fix this check" just works.
Always a keystroke away
⌘I opens Runner from anywhere, ready for whatever’s next.
Qualitative research, on-demand
Recruit a representative panel, run moderated interviews, and get synthesised findings in minutes, not weeks.
From first reaction to ranked findings
Recruit, interview, and synthesise the whole study in one place.
Participants
“I’d expect the total to update right here, but nothing happened. Now I’m not sure it worked.”
Recruit a panel in minutes
Cast actors that match your audience, each with their own background and device.
Guide it your way
Bring a discussion guide or let Stunt Double draft one from your brief.
Watch them think aloud
Live transcripts stream in as each session narrates every hesitation and delight.
Findings, not transcripts
A synthesised report of themes, quotes, and ranked recommendations the moment interviews wrap.
Test any artefact, any round
Interview Figma prototypes or live products, and actors recall prior rounds to compare cleanly.
Better experiences, together
Bring actor insights and real human feedback into a single loop.
Human feedback too
Capture perspectives from both your AI actors and real human testers in one place.
Capture comments
Enhance prototypes, websites, and designs with annotated feedback that lets your team review, share, and collaborate together.
Suggestions
Get actionable recommendations tied to your goals, ready to action
Measure progress
Re-run journeys after each iteration to see what improved and what still needs work.
Legal reviewer
Claims & terms
Compliance auditor
Policy & regulation
Onboarding expert
First-run journeys
Power-user expert
Advanced flows
Clarity reviewer
Non-technical lens
Meet your cast
AI that can act: we call them Aictors. Each is an expert in a specific role, from internal stakeholders to technical end-users, that steps in exactly when its perspective is useful.
Works where you work
Stunt Double plugs into the tools you already use. Connect Claude to run your workspace from a conversation, and wire findings into the rest of your stack.
Claude
Run your whole workspace from a conversation with the one-click desktop extension.
Linear
Push findings straight into your backlog as issues, ready to triage.
GitHub
Comment on pull requests and tie feedback back to the code that shipped it.
Slack
Get run summaries and alerts where your team already talks.
Figma
Audition Figma Design, Make and Sites before a single line of code is written.
Vercel
Kick off a cast on every preview deployment and catch regressions early.