Create card sorting studies in minutes. Get similarity matrices, dendrograms, and AI-powered insights — all for free.
No feature gates, no participant limits. Run professional card sorting studies completely free.
All three card sorting types included. Let participants create categories, sort into yours, or both.
No caps on responses. Share your study link and collect as many responses as you need.
See which cards participants group together. Identify strong and weak relationships at a glance.
Hierarchical clustering reveals natural category structures and relationships between cards.
For closed sorts, see exactly how participants mapped cards to your predefined categories.
Get automated analysis of patterns, outliers, and actionable recommendations from your data.
Add your cards, choose your sort type, and share your link. Participants can sort on any device.
Watch responses come in live. Analysis updates automatically as new participants complete the study.
Your participants just click the link and start sorting. No sign-ups, no barriers.
Add your cards and choose open, closed, or hybrid sort. Write optional instructions for participants.
Send your unique study URL to participants via email, social media, or embed it in your site.
Participants drag and drop cards into categories on any device. No account needed for them.
View similarity matrices, dendrograms, and AI insights. Export data for deeper analysis.
Card sorting is the go-to method for understanding how users organize information.
| Feature | Free Card Sort | OptimalSort | UserZoom |
|---|---|---|---|
| Free tier | Unlimited studies | 1 study/month | No free tier |
| Participants | Unlimited | 10 per study | Varies by plan |
| Similarity matrix | |||
| Dendrogram | |||
| AI insights | — | — | |
| Open + Closed + Hybrid | |||
| Real-time results | — | — | |
| No participant sign-up | — | — |
Join thousands of researchers using Free Card Sort to build better information architectures.
Create Your Free StudyFree forever. No credit card required.