A/B Testing for Bubble
Optimize Bubble landing pages, onboarding flows, and marketing wrappers without rebuilding workflows. Add Stellar to your app header, test UI copy and CTAs visually, and track signup conversions.
🚀 For Bubble builders and no-code SaaS teams
Set up A/B testing on your Bubble site in under 60 seconds
How it works on Bubble
Install the Stellar snippet
Add one line of code to your Bubble site head. Direct installation is recommended for anti-flicker and fastest variant delivery.
Create an experiment and variants
Use the no-code visual editor to change headlines, buttons, images, or layout on live pages—no redeploy required.
Configure targeting rules
Limit experiments to specific URLs, devices, or countries so tests only run for the audience that matters.
Add conversion goals
Track signup button clicks, workflow completion pages, or custom events on Bubble-exposed marketing pages.
Analyze results and ship winners
Review real-time stats in Stellar, optionally sync conversions to GA4, and apply the winning variant.
Install the Stellar snippet on Bubble
Paste your snippet in Bubble Settings → SEO / metatags → Script/meta tags in header (or HTML element on specific pages). Direct head install is recommended so anti-flicker works correctly. Full install guide →
- In Bubble editor, open Settings → SEO / metatags
- Paste your Stellar snippet in Script/meta tags in header for app-wide install
- Alternatively, use an HTML element on specific marketing pages if you only test isolated landers
- Deploy to live version and test on the production Bubble URL
For SPA-style Bubble navigation, confirm experiments re-evaluate on page transitions relevant to your test URLs.
Pre-launch QA checklist
Run through this list before sending traffic to an experiment on Bubble.
- Confirm stellar.js loads in the Network tab on pages where experiments should run
- Verify only one install path is active (direct head install or GTM—not both)
- Match anti-flicker settings to your install method (direct install recommended)
- Clear CDN, theme, or platform cache after saving snippet changes
- Test in an incognito window with ad blockers disabled
- Deploy to live (not only Development) before launching experiments
- Confirm snippet on the exact Bubble page URL used in experiment targeting
- If using responsive Bubble layouts, test mobile and desktop breakpoints
- Verify Bubble privacy rules do not block script execution on public pages
Bubble limitations and gotchas
Single-page app behavior
Bubble apps often navigate without full reloads. Validate that Stellar tracks conversions on the workflows and URLs you target.
Header vs. page-level install
App-wide header install is simplest. Page-level HTML elements work for isolated tests but are easier to duplicate accidentally.
Native Bubble experimentation
Bubble focuses on app building, not CRO tooling. Stellar adds client-side testing without restructuring Bubble workflows.
GA4 tracking for Bubble experiments
Stellar sends conversion events to Google Analytics 4 via the Measurement Protocol, so experiment data appears alongside your other Bubble analytics. GA4 integration setup →
Event name: stellar_experiment_conversion
Register these custom dimensions in GA4 (Event scope):
experiment_id,experiment_namevariant_id,variant_nameconversion_id,conversion_name
Keep your Bubble site fast while you test
Stellar's 5.4KB async snippet loads without the bloat of legacy testing platforms—important for SEO and Core Web Vitals on Bubble.
At just 5.4KB and served on a CDN, Stellar's pure JS script is 25x smaller than competitors like VWO or AB Tasty. With minimal dependencies and a fixed size regardless of test count, it preserves your website's speed, Core Web Vitals, user experience, and SEO performance.
Why teams choose Stellar for Bubble
Bubble A/B test ideas to run first
Landing page headline
Test value props on Bubble marketing index pages.
Signup flow CTA
Compare signup button copy and color on onboarding entry.
Pricing page
Test plan order and feature bullets on Bubble pricing screens.
Hero illustration
Swap hero graphics on Bubble landing wrappers.
Mobile layout
Test collapsed vs. expanded mobile menus affecting CTA visibility.
Trial messaging
Test free trial vs. demo request framing on SaaS landers.
Pricing
Free
Up to 25k MTU
Built-in analytics
Visual web editor
Custom CSS & JS editor
AI editor assistant
Basic A/B testing
Up to 3 variants per experiment
Up to 2 experiments running simultaneously
Pro
50k MTU included
Unlimited variants
Unlimited concurrent experiments
Advanced targeting rules
Dynamic keyword insertion
AI insights & recommendations
Priority support
Enterprise
Custom MTU volume
Custom solutions
Integrations support
We dynamically bill in small increments of 1k MTU, so you only pay for what you actually use and never overpay
No hidden fees, no large fixed blocks. Scale smoothly as your traffic grows with predictable, usage-based billing
We only count users who actually see experiments. Multiple experiment views from the same user count as just 1 MTU
Trusted by marketers running experiments
Jake M. — Performance Marketer
⭐️⭐️⭐️⭐️⭐️
Other testing tools have a million features I don't need. Stellar focuses on what actually matters: speed, ease of use, and great analytics.
Richard R. — E-commerce Owner
⭐️⭐️⭐️⭐️⭐️
Stellar is the real deal. No unnecessary features, no steep learning curve. Just quick tests that actually improve our store.
Ben C. — Growth Hacker
⭐️⭐️⭐️⭐️⭐️
It does the job without slowing down our pages. If you're running tests and care about performance, this is the tool to use.
Frequently Asked Questions
More platforms
Stellar works on any site where you can add head code. Explore setup guides for other platforms: