Upload your variants
Use screenshots, HTML, concept art, or concise notes for a control and one or more challengers.
Many voices. One decision.
Know which variant wins before you spend.
Simulates target personas from the audience you define, compares your variants, and gives you a reasoned winner call in minutes -not weeks.
200 free creditsNo credit card requiredResults in minutes
Why Chorus
Made for teams who are currently copy-pasting into ChatGPT.
Chorus gives the same fast answer -but with audience specificity, statistical confidence, and an exportable audit trail your team can act on.
Without ChorusWith Chorus
Copy screenshots into ChatGPT and ask for a gut opinionStructured panel of audience-matched personas with a reasoned verdict
Wait 2–6 weeks for a user research agency or panelResults in minutes on your timeline, before any spend
One shot -no replication, no confidence scoreAnytime-valid statistics with a declared winner and p-value
No audience specificity -generic feedbackDefine your countries, demographics, and evaluation goal
Lose the rationale when the chat session endsExportable report with per-persona reasoning
How It Works
Plain workflow. Fast decision.
Chorus is meant to be used early, when you have a few directions and need a grounded read quickly before launch.
Define who should judge
Pick the benchmark mode, countries, and audience context so the simulation matches the decision.
Read the winner call
See the likely winner, the rationale behind it, and which personas reacted differently.
What You Can Actually Simulate
From landing pages to game concepts, the scope is visible upfront.
Chorus is built for the pre-launch decisions growth and game teams make most often, not just one narrow benchmark.
Landing Pages & Sign-up Flows
Website Conversion
Test landing pages, fundraising banners, PDPs, and sign-up surfaces before you buy more traffic.
Concept Art & Play Intent
Gaming Concept
Compare new game concepts, fantasy directions, and visual hooks before a team commits to production.
Icons & Store Assets
Gaming Store Creative
Pressure-test icons and screenshots against fast-scan install intent before the store page goes live.
Also coversGaming MonetizationGaming Ad CreativeGaming Onboarding
Define Your Own Decision Type
Custom Modes for your own evaluation logic.
The built-in modes cover gaming and web. If your decision does not fit one of them, define your own mode with a name, goal, and audience brief. Chorus can run the same structured evaluation across a control and multiple challengers.
MessagingCreativeProduct flowsInternal decisions
Use it when the evaluation logic matters more than the content format.
Your Data Stays Yours
Use Chorus when the work is still private.
You do not need to ship unreleased creatives to a public human panel just to get an early read. Chorus is built for pre-launch decisions while the work is still in progress.
Keep unreleased work out of public tests.Get a read in minutes instead of weeks.Bring your own audience brief and context.Make the call before traffic spend or production commitment.
Common Questions
Quick answers.
How is this different from a real user test?
Chorus runs in minutes, not weeks. You don't need to recruit, schedule, or pay participants -the personas are simulated from the audience brief you provide. It's best used for early directional decisions before committing to production or ad spend.
What file types can I upload?
PNG, JPG, and WebP images. You can also describe a variant in plain text if you don't have a visual yet -a description alone is valid input.
What do credits cost?
New accounts start with 200 free credits, no credit card required. Each persona judgment costs 1 credit at the standard tier. You can check your balance in the profile page.
Can I define my own evaluation criteria?
Yes. Custom Modes let you specify a mode name, goal, and audience brief. Chorus runs the same structured pairwise evaluation using your criteria instead of a built-in benchmark.
Ready to run your first simulation?