A Free OptimalSort Alternative for Card Sorting
Optimal Workshop's OptimalSort is the established card sorting tool used by large UX teams and research agencies. It offers the deepest statistical analysis in the industry. But if you are a freelancer, student, or small team, the price can be a barrier. Free Card Sort is a lighter, faster alternative built for teams that need solid card sorting analysis without the enterprise price tag. Here is an honest comparison of both.
Free plan: 3 studies. Unlock the full analysis for a single study for $15, or choose Starter at $19/mo.
Used by 1,800+ users.
When OptimalSort is the better choice
OptimalSort is the better choice when:
- You need the most advanced statistical analysis available: factor analysis, multidimensional scaling, and advanced clustering options.
- You are part of a large organization or research agency with a dedicated UX research budget.
- You need integrated tree testing (Treejack) as part of a complete IA research suite.
- Enterprise features like SSO, advanced permissions, and white-label reports matter to your team.
Side-by-Side Comparison
| Feature | Free Card Sort | OptimalSort |
|---|---|---|
| Open card sorting | Yes | Yes |
| Closed card sorting | Yes | Yes |
| Hybrid card sorting | Yes | Yes |
| Free plan responses | 3 studies, unlimited participants | Trial only |
| Similarity matrix | Via unlock ($15) | Included |
| Dendrogram | Via unlock ($15) | Included |
| Factor analysis | No | Yes |
| Multidimensional scaling | No | Yes |
| AI-powered insights | Starter ($19/mo) | No |
| Participant accounts required | No | No |
| Tree testing | Separate tool (validatethat.io/tree-testing) | Integrated (Treejack) |
| Starting price | Free / $15 per study / $19/mo | From $199/mo From $199/mo for Team plan (source, checked Oct 19, 2026) |
What you gain with Free Card Sort
Lower price
Free Card Sort starts at $0 for 3 studies. If you need more, Starter at $19/mo is still a fraction of OptimalSort's starting price. If you only need one study analyzed, the $15 per-study unlock is cheaper than a monthly subscription.
Faster setup
Free Card Sort is designed for speed. You can go from signup to a live study quickly. OptimalSort has more configuration options, which means more setup time.
AI-powered insights
Starter ($19/mo) includes AI that reads your card sort results and suggests how to structure your navigation or IA. OptimalSort gives you the raw statistical analysis; you interpret it yourself.
Modern interface
Free Card Sort is built with a newer, cleaner UI. Participants find it easier to use, especially on mobile devices.
What you give up
Advanced statistics
OptimalSort offers factor analysis and multidimensional scaling. Free Card Sort does not. For most card sorting projects, similarity matrices and dendrograms (which Free Card Sort provides via per-study unlock) are enough. But if you need the deepest statistical rigor, OptimalSort is unmatched.
Integrated tree testing
OptimalSort includes Treejack for tree testing in the same platform. Free Card Sort does not bundle tree testing; you would use a separate tool like validatethat.io/tree-testing. If you want everything in one place, OptimalSort is more integrated.
Enterprise features
OptimalSort offers SSO, advanced user permissions, white-label reports, and enterprise support. Free Card Sort does not (yet). If those matter to your organization, OptimalSort is the safer pick.
Established reputation
OptimalSort has been around for years and is widely known in the UX research community. Free Card Sort is newer. If name recognition matters (for example, in a procurement process), OptimalSort has the advantage.
Free plan: 3 studies. Unlock the full analysis for a single study for $15, or choose Starter at $19/mo.
Used by 1,800+ users.
Moving a study from OptimalSort to Free Card Sort
If you have a card sort set up in OptimalSort and want to try Free Card Sort, here is how to move it:
- In OptimalSort, export your card list (usually a CSV or copy-paste the cards).
- In Free Card Sort, create a new study and paste the card names into the builder.
- Choose open, closed, or hybrid to match your original study type.
- Share the new participant link. Participants do not need to sign up.
You cannot import existing participant responses from OptimalSort into Free Card Sort. This is for starting a new round of data collection with the same cards.
Pricing comparison
Free Card Sort
Free Card Sort offers three ways to pay, depending on how much card sorting you are doing:
Free
$0
3 studies. No credit card required.
Per-study unlock
$15 one-time
Unlock the full analysis (including AI insights) for a single study. Good if you only need one or two studies analyzed.
Starter
$19/mo
Full analytics, AI-powered insights, and CSV export.
Optimal Workshop
OptimalSort is part of Optimal Workshop's suite. Pricing starts at about $199/mo for a team plan, per their pricing page (checked 2026-10-19). They also offer a free trial.
Tree testing: Treejack vs validatethat.io
OptimalSort and Treejack are part of the same suite, so if you need both card sorting and tree testing in one platform, Optimal Workshop is the integrated choice. Free Card Sort focuses on card sorting; for tree testing, you would use validatethat.io/tree-testing, which is a separate tool. Both approaches work. The integrated suite is more convenient; the separate tools let you pick the best option for each method.
Frequently Asked Questions
Is Free Card Sort really free?
Yes. The free plan gives you 3 studies. No trial period, no credit card required. If you need AI insights or CSV exports, Starter is $19/mo. For full analysis (similarity matrix, dendrogram) on a single study, the per-study unlock is $15.
Can I export my data from Free Card Sort?
CSV export is available on Starter ($19/mo). The free plan gives you the basic results in the interface, but not as a downloadable file.
Does Free Card Sort have the same statistical rigor as OptimalSort?
For most card sorting projects, yes. Free Card Sort provides similarity matrices, dendrograms, and cluster analysis via the per-study unlock or Starter plan, which cover the majority of card sort analysis needs. OptimalSort adds factor analysis and multidimensional scaling, which are useful for very large or complex studies but not required for most projects.
Which should I choose for a student project?
Free Card Sort. You get 3 free studies, which is enough for most student projects. OptimalSort requires a paid plan after the trial ends.
Related Resources
Free plan: 3 studies. Unlock the full analysis for a single study for $15, or choose Starter at $19/mo.
Used by 1,800+ users.