Reader audiences
Build a panel with demographic, socioeconomic and psychometric profiles. Hear your copy the way each reader hears it.
Explore reader audiences
Copy testing.
Every word earns its place.
Read your copy the way your audience would. Simulated segments react to headlines,
sections and calls to action before a single visitor does.
Powered by Cairo Rosetta
Copy you can test with Cairo
Make the first screen say it all.
Test hero headlines, subheadings and intros with simulated first-time visitors. Learn what they understand—and what they miss.
First-read clarity
Value recognition
Scroll triggers
What do first-time visitors take from the hero?
Cairo
They get 'fast', but not who it is for. Naming the audience in the subheading fixes it.
Audience perspectives ready
Same panel.
New perspectives.
New perspectives.
Explore another direction
Powered by Cairo RosettaCanvasVariantsAudiencesReport
Reading
Exploring
Comparing
Inspecting
Considering
Reviewing
Hero clarity70%
Illustrative synthetic resultsA copy testing panel that never sleeps.
Share the words. Cairo reads them back.
From first impression to the line you keep.
Copy simulations
A page in, reactions out. Watch simulated people read your copy in context—surrounded by your design, not in a vacuum.
See how copy tests work
Copy variations
Turn reactions into sharper drafts. Rewrite on a copy of your page, preserve the original and compare versions with the same panel.
Explore copy variationsPrivate drafts
Keep unreleased copy in your own workspace. Share a de-identified project with the community only when you choose.
Explore the workspace
Put your copy in front of simulated readers.
Turn what they repeat back into what you publish.
Sign-up intent68%
HomeProductPricing
Illustrative synthetic results
Share the copy. Watch the reading.
Start with a URL or pasted copy. Cairo follows simulated readers as they skim, stop, re-read and react—line by line.
Founders
Creators
Explorers
78/100
Product fitLower fitHigher fit
Illustrative synthetic resultsHear each segment read differently.
Build distinct synthetic segments. The same sentence lands differently for a founder, a designer and a first-time visitor—see how.
Sign-up intent
68%Original
78%Variation
Rewrite. Re-test. Keep the winner.
Apply the stronger copy to a copy of your page, preserve the original and test the new version with the same segmented panel.
Discover new perspectivesA community of
A community of
product experiments
Explore shared simulated projects, react to ideas, rate different aspects and remix an experiment into your own workspace.
Explore CairoProduct designer
Founder
Growth marketer
First-time visitor
Write with a clearer picture
Don't publish the draft and hope.Start with 500 free credits
Hear simulated readers react first.
Pro
$29/monthRun simulations on your own. Credits scale with the size of each analysis.
What you get:- 10,000 credits every month
- Reports, audiences and replay included
- Failed actions refunded automatically
Agency
$99/monthMore volume for teams running many projects and variant searches.
What you get:- 50,000 credits every month
- Deeper variant searches
- Same credit pricing across projects
Behind Cairo
Explore Cairo Rosetta
A closer look at the research behind understanding and simulating human behavior.
Explore RosettaYour project. Your workspace.
Explore ideas without acting on your live customers.
Private projects
Owner-scoped assets
Opt-in sharing
Simulated actions
A few things worth knowing
Is simulated copy testing a replacement for real copytesting?
No. Cairo produces simulated signals that help you compare directions and prioritize what to validate with real readers. It does not replace human copytesting panels, surveys or live performance data.
Cairo Labs·MethodDo I need a live page to test copy?
No. You can paste a URL to test copy in its real context, or describe your product and share the draft copy you want reactions to.
Cairo Labs·SetupCan Cairo test copy in different tones of voice?
Yes. Compare two or more directions—formal vs casual, short vs detailed—with the same simulated panel and see which tone each segment trusts.
Cairo Labs·Use casesHow much does copy testing with Cairo cost?
Free includes 500 welcome credits. Pro includes 10,000 credits for $29 per month; Agency includes 50,000 for $99 per month. Costs depend on the pages, interactions and variations involved. Failed actions are refunded.
Cairo Labs·PricingTest your next draft before it ships
Hear reactions from synthetic readers.
Keep the words that earn their place.