Stratified A/B Testing
Built for growth teams and PMs who need more than aggregate results.
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What is Stratified A/B Testing?
Stratified A/B testing refers to segmenting users based on specific characteristics like behavior, demographics, or device type. By targeting these unique user segments, stratification ensures that your A/B tests yield more accurate and actionable insights.
Platform Features
Find the winner hiding in your data
Most A/B tests call a winner that only looks right in aggregate. Stratafy breaks results down by segment — device, behavior, traffic source — so you catch cases where a test wins overall but is actually losing with your highest-value users.
Know when to trust your results
Stop guessing whether a result is real or noise. Stratafy shows you the probability your result happened by chance, the range of possible outcomes, and how confidence builds over time — so you call a winner when the data actually supports it, not just when you're impatient.
Test anywhere your users are
Run the same stratified analysis whether your test lives on web, mobile, or both. One workflow, consistent statistical rigor, no re-learning a new tool per platform.
How Stratified A/B Testing Works
Step 1: Set Up Your Test
Define your test variables and create user segments, ensuring your A/B testing process includes targeted stratification for better results.
Step 2: Run Stratified A/B Test
Execute your stratified A/B tests on specific user segments to analyze how each group reacts to different variations.
Step 3: Analyze Results
Leverage real-time data to gain insights into your stratified test performance and visualize results through interactive charts.
Why stratification matters
Standard A/B testing tells you which variant won. It doesn't tell you who it won with.
A test can show a positive result overall while quietly losing with your mobile users, your highest-spending segment, or new visitors — and you'd never know, because the average hides it.
Stratafy breaks every test down by the segments that matter to your business, so “B wins” becomes “B wins with returning desktop users, but A is still better for first-time mobile visitors.” That's the difference between a result and a decision.
| Standard A/B Tools | Stratafy | |
|---|---|---|
| Overall winner | Yes | Yes |
| Segment-level breakdown | No | Yes |
| Confidence over time | Varies | Yes |
| Catches segment-masked losses | No | Yes |
Frequently Asked Questions
What is stratification in A/B Testing?
Stratified A/B testing involves segmenting users into different groups based on specific characteristics (such as behavior, demographics, or device type) to achieve more accurate and actionable insights during the A/B testing process.
How does Stratafy help with A/B testing?
Stratafy provides a platform that allows you to run stratified A/B tests by targeting specific user segments. This helps ensure that your tests are more relevant, and the insights you gather are actionable and useful for optimizing your website or app.
Who is Stratafy built for?
Stratafy is built for product and growth teams at SaaS companies running serious experiments — typically 5 to 500 people. If you're at that stage, you'll get the most out of it.
Do I need technical expertise to use Stratafy?
Stratafy is designed to be user-friendly and accessible for both technical and non-technical users. We provide automated insights and easy-to-follow workflows to help you get the most out of your A/B testing without requiring deep technical knowledge.
Payment Plans
Free
- 1 active test at a time
- Up to 1,000 tracked users / month
- Overall winner, p-value and confidence
- Segment-level breakdown
Starter
- Unlimited active tests
- Up to 10,000 tracked users / month
- Overall winner, p-value and confidence
- Full segment-level breakdown
- Email support
Enterprise
- Everything in Starter
- Higher volume (custom limits)
- Dedicated support
- Custom contract terms