User-centred design for the age of AI
Stunt Double sends AI actors through your designs, prototypes, and live products, reporting back exactly what they experience.
Works where you work
- Linear
- GitHub
- Slack
- Figma
- Vercel
- Claude
- Webhooks
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.
A stand-in for your users at every stage
From early interviews to automated checks to behavioural optimisation, Stunt Double gives you user-grounded feedback at every stage of the process.
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.
Fatima
Legal reviewer
Chen
Compliance officer
Sarah
First-time user
Marcus
Power user
Priya
Non-technical manager
Meet your cast
AI that can act: we call them Aictors. They take on any role from internal stakeholders to technical end-users, each with their own background, expertise, and perspective. They browse with real sessions, their own email and knowledge, and surface the insights that only come from genuinely using what you've built.
Questions, answered
Everything you need to know.
What is Stunt Double?
Stunt Double deploys a cast of AI actors, each with a distinct persona, to navigate your product like real users. They work through journeys, complete tasks, and report exactly what they experience, backed by screenshots, transcripts, and clear recommendations.
How is this different from traditional user testing?
It complements it. Your actors give fast, repeatable feedback at any hour, across personas and devices, so you catch the obvious issues before spending real users’ time. You can bring human testers in too, and Stunt Double folds both into one set of findings.
Can I validate a design before I build it?
Yes. Point an interview at a Figma prototype and your panel reacts to the design frames, so you can test the direction while it is still cheap to change.
How trustworthy are the findings?
Every finding is grounded in evidence: the actor’s reasoning, the steps they took, and screenshots of what they saw. You can judge each recommendation on the proof rather than take it on faith.
Which tools does it work with?
Linear, Slack, GitHub, Figma, Vercel, and webhooks, plus a Model Context Protocol server so you can run journeys straight from Claude, ChatGPT, or any AI assistant.
How do I get started?
Create your first actor in minutes and run your first journey the same day, then upgrade when you are ready to bring in the whole team.
