Build navigation users actually understand
Run card sorts, tree tests, and surveys. Recruit participants through Prolific. Get actionable insights in minutes — not weeks.
No credit card required · Unlimited free studies · Setup in under 5 minutes
Cards to Sort
Clothing & Apparel
Accessories
Shoes & Footwear
How It Works
From zero to insights in under 10 minutes
Create Your Study
Paste your cards or pick a template. Choose open sort, closed sort, tree test, or survey. Done in under 5 minutes.
Get Responses on Autopilot
Share a link, recruit verified participants through Prolific (~$1.50 each), or generate AI test responses instantly.
Ship Better Navigation
Watch patterns emerge in real-time with dendrograms and similarity matrices. Export to CSV and share with stakeholders.
Instant Insights
Stop spending weeks on manual analysis
Traditional IA research means exporting spreadsheets and manually clustering data. CardSort gives you dendrograms, similarity matrices, and pattern recognition automatically — the same analytics enterprise tools charge $200+/month for.
- Automatic pattern detection
- Real-time results as responses come in
- Dendrograms & similarity matrices included free
- Export to CSV for deeper analysis
Built-in Recruitment
Get quality responses while you sleep
Stop begging colleagues to take your study. Our Prolific integration recruits verified, quality participants from a global panel of 200K+ — right from your dashboard.
- Prolific integration — verified participants from ~$1.50
- 10 free recruitment credits on every account
- AI test responses to preview before you launch
- Share your link anywhere — email, Slack, social
Complete Toolkit
One platform for your entire IA workflow
Don't pay for four different tools. CardSort handles card sorting, tree testing, surveys, and participant recruitment in a single platform — with templates and multi-language support built in.
- Open & closed card sorts, tree tests, surveys
- Professional templates for every industry
- Custom branding & multi-language support
- Gamified experience — 2-3x higher completion rates
Success Stories
Real results from real researchers
“We redesigned our entire navigation based on CardSort data. Task completion jumped 47% in the first month — our best UX win this year.”
“I used to spend 2-3 weeks on IA research with OptimalSort. Now I get better insights in 2 days. The Prolific integration alone saves me hours.”
“Our study completion rate went from 45% on OptimalSort to 92% on CardSort. The gamified experience isn't a gimmick — it genuinely gets better data.”
Free Guide: Card Sorting for Better Navigation
Learn the proven methodology that helps product teams make navigation decisions backed by real user data.
FAQ
Frequently asked questions
Your competitors are guessing.You don't have to.
Start your first study in under 5 minutes. Get the IA insights that enterprise teams pay $200+/month for — free.
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