Synthetic users that do something.

Most synthetic users answer interview questions. Ours try to get something done. They walk your real docs step by step, and when they can't go on, they show you the paragraph that stopped them.

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Opinions are cheap. Attempts are evidence.

An AI persona saying “I'd find this confusing” is a guess you can't check. A persona that stalls at step four because section 3.2 doesn't cover their situation is a finding you can open, read and fix.

How it works.

  1. 01Bring your docs.Subjourney builds the journey they describe, and the personas who'd walk it.
  2. 02Run them.Each persona pursues a goal, node by node, using only what your docs give them.
  3. 03Read the evidence.Every stall is pinned to a step and a paragraph.

Interview-style vs journey-style.

  • What they do

    Interview-style synthetic users
    Answer questions
    Subjourney personas
    Try to reach an outcome
  • Grounded in

    Interview-style synthetic users
    A description of who they are
    Subjourney personas
    Your docs, one step at a time
  • Output

    Interview-style synthetic users
    Quotes and opinions
    Subjourney personas
    Stalls traced to paragraphs
  • How you check it

    Interview-style synthetic users
    You can't, really
    Subjourney personas
    Open the paragraph and read it

“Aren't synthetic users unreliable?”

For opinions, often. That's why Subjourney doesn't ask what personas think. It shows what your docs let them do, and every finding points to text you can verify yourself.

Stop asking personas. Start running them.