User simulation

Know which version wins
before you ship it.

Test every idea with every user, in minutes.

Try it free Book a call

200 twins

  • 60%Picked an option
  • 10%Wrote their own
  • 30%Dropped, no option fit
How it works

Twins that use your product
like your users would.

  1. 01 · Real browser

    End to end, like a real user.

    Digital twins click, type, sign up, and check out on your web app, mobile app, or AI agent.

    Digital twins in action
  2. 02 · Real behavior

    Behavior that holds up.

    Twins model memory, attention, and patience, unlike an LLM role-playing a user, and are checked against real interviews. Each is grounded in real people: our people search and interviews, and your own data.

    From Constants
    • Learn more
    • Learn more
    Bring your own data
    Dana, 52Operations manager
    Twin
    Products used
    Two rival tools
    Tech comfort
    Moderate
    Price sensitivity
    High
    Attention
    Skims long text
    Memory
    Recalls the first price
    Patience
    Quits after two errors
  3. 03 · Ranked report

    Know what to fix first.

    Get a ranked report on friction, concept appeal, pricing, and segment fit.

    User Simulation ReportTwin 1 of 200
    Digital twinMei, 28 · lab technician picking a tool for her team
    Summary

    Settled on the Team plan after some digging, lost her choice to the yearly toggle, and left when asked for a card before the trial.

    Key takeaways
    • Asking for a card before the trial ended the session
    • What Team adds over Starter needs to show without scrolling
    JourneyIssues 4Feedback 4Tasks 2
    1:34 / 2:00
    Tasks
    T1 · CompletedT2 · Not finished
    Feedback
    Issues
    1234

Test every idea.
Ship the winner.

Your first simulation is free, with the report in about 20 minutes.

Try it free Book a call