Validate any message against a synthetic society.
Drop a message, ad, or landing-page copy and get a confident verdict in under a minute — a rating, the disagreement range across a panel of synthetic buyer personas, why it lands, why it doesn’t, and how to improve it.
From message to verdict in three steps.
Drop your message
Paste a pitch, ad, landing-page section, or short document. No setup, no audience config to fill out first.
Run the society
A panel of synthetic buyer personas — each with its own role, company size, and buying context — reacts in parallel.
Read the verdict
A rating, the disagreement range across the panel, why it works, why it doesn't, and concrete ways to sharpen it.
Built for speed, honesty, and reproducibility.
A confident read in under a minute.
No recruiting, no Prolific, no survey fatigue. Iterate on messaging the same hour you write it. Campaign cycles don’t wait for traditional research — now your insights don’t have to either.
Disagreement, not just an average.
Every verdict shows the spread across the synthetic society — you see where a message splits the room, not only the mean score.
Reproducible by construction.
Seeded runs and persisted artifacts. Re-open a verdict months later with full methodology intact.
Honest about what it is.
Outputs are explicitly simulation estimates, not forecasts or professional advice. No unsupported “predictive” claims.
From $19 per run, or $79/month.
Subscribe monthly, or pay per run with no commitment. BYOK at $9/run.
$758/yr · save 20% · 3 runs / month. Best for occasional validation.
- Up to 200 personas per run
- Rating + disagreement range
- Structured verdict + export
- Reproducible, seeded artifacts
$1,910/yr · save 20% · 12 runs / month. Best for active testing cycles.
- Up to 200 personas per run
- Rating + disagreement range
- Structured verdict + export
- Reproducible, seeded artifacts
$4,790/yr · save 20% · 35 runs / month. Best for high-cadence research.
- Up to 200 personas per run
- Rating + disagreement range
- Structured verdict + export
- Reproducible, seeded artifacts
Pay per run
Test your messaging before you ship it.
Join teams using Sibyl to move faster from copy to confidence.
Request early access