Multivariate Testing ToolThat Finds the Winning Combination
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How It Works, Step by Step
How Multivariate Testing Works in CROLabs
Step 1: Pick your elements. Choose the parts of the page you want to test. Headlines, CTAs, images, sections. Anything you can see, you can test.
Step 2: Create versions. For each element, create two or more alternatives in the visual editor. No code needed.
Step 3: CROLabs generates every combination. Two headlines and two button colors? That’s four variants, created automatically. You don’t build them manually.
Step 4: Traffic splits automatically. Each combination gets its own share of visitors. CROLabs tracks conversions for every single one.
Step 5: Find the winning combination. You don’t just learn which headline is better. You learn which headline paired with which button drives the most conversions. That’s something sequential A/B tests can’t tell you.
Choose the Right Test for the Job
When to Use Multivariate Testing Instead of A/B
A/B testing is great when you want to isolate a single change. Multivariate testing is better when you suspect that multiple elements on a page interact with each other.
A benefit-led headline might convert well on its own. But paired with the wrong CTA, it underperforms. A multivariate test catches that. An A/B test doesn’t.
| A/B Testing | Multivariate Testing | |
|---|---|---|
| Best for | Isolating one change | Testing how elements interact |
| Traffic needed | 300+ visitors per variant | 300+ per combination (scales fast) |
| Complexity | Simple, one variant | Multiple elements, auto-generated combinations |
| Speed to results | Faster on low traffic | Faster than sequential A/B tests on high traffic |
| Use when | You have a clear hypothesis about one element | You suspect headline + CTA + image work together |
Not sure which to use? Start with A/B testing. Move to multivariate when your traffic supports it and you want to understand how elements interact.
No-Code Visual Editor for Multivariate Testing
Build Variants Without Code
The same visual editor you use for A/B tests works for multivariate tests. Click any element on your live page, change it, save it. Text, images, buttons, colors, sections. If you can see it, you can test it.
No developers. No staging environment. No code editor. Just click, change, and launch.
Each change you make is tracked as a separate element. CROLabs combines them into every possible variant automatically. You focus on the ideas. The multivariate testing software handles the math.
Data-Driven Decisions, Not Guesswork
Know When You Have a Winner
CROLabs tracks conversion rate, uplift, and statistical confidence for every combination. You see all results in one view, ranked by performance.
Wait for 95% confidence before calling a winner. With multivariate tests, that means you need more traffic than a standard A/B test. More combinations means more visitors needed. That’s the tradeoff.
A good rule: keep your combinations manageable. Two elements with two versions each gives you four combinations. That’s reasonable. Five elements with three versions each gives you 243. That’s not going to reach significance unless your page gets serious traffic.
Start simple. Two or three elements. Two versions each. Learn from the results and expand from there.
💡 On high-traffic pages, multivariate tests typically reveal 8-15% more conversion potential than sequential A/B tests because they uncover interaction effects between elements that individual tests miss.
Built-In Guardrails
Set It and Let It Run
Auto-stop rules
The experiment pauses automatically when it reaches your target sample size or if a combination drops below a performance threshold. No need to babysit the dashboard.
Scheduling
Run the test only during specific days or hours if that fits your traffic patterns. Useful for promotions with hard end dates.
Traffic control
Start with a smaller percentage of visitors and scale up once you're confident the test is running cleanly. Reduce risk on high-value pages.
GDPR-Compliant by Default
Built and Hosted in the EU
CROLabs does not collect personally identifiable information. No names, no emails, no IP addresses. Built and hosted entirely in the EU. No US data transfers.
You don’t need to add CROLabs to your cookie consent banner for the tracking itself. The script loads asynchronously, so your Core Web Vitals stay clean. Search engines always see your original page, never a variant.
Testimonials
Your Words. Not Ours.
We switched from VWO because the pricing was getting out of hand. CROLabs does everything we need at a fraction of the cost, and the AI recommendations are something VWO never had.
Kleinfeldt & Thum Media
I signed up mainly for the A/B testing, but the AI Advisor is what kept me. It flagged conversion issues on my landing pages I'd been missing for months. Specific, prioritized, easy to act on. Two tests from the suggestions, both won. Impressed.
KC Malik Consulting & Development
Honestly I was skeptical about the AI recommendations but they've been surprisingly solid. It flagged stuff on our landing page that we'd been missing for months. Ran two tests from the suggestions and both won. Not bad for the first week.
CORE Marketing
Ready to Find Your Best-Performing Combination?
Sign up free and launch your first multivariate test in minutes. No credit card. No developer. Just pick your elements, create your versions, and let CROLabs find the winner.
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