A Google Optimize alternative that is still here.
Optimize shut down on September 30, 2023. GA4 Experiments has no visual editor. Stellar is the visual-editor + GA4 replacement: 5.4KB script, native GA4, and a free sandbox you can start without a sales call.
A replacement that is capable and easy to use.
Visual A/B tests on live pages, targeting, heatmaps, stats, native GA4. The editor marketers actually missed, without the expensive or clunky tradeoff that came after Optimize shut down.
Optimize is gone
Google retired Optimize and Optimize 360. There is nothing left to patch, renew, or wait on.
GA4 is not a visual editor
Built-in GA4 experiments have no WYSIWYG. Variants become engineering tickets again.
The usual replacements trade off
Some are capable but expensive. Some are cheaper, but heavy or hard to use. You should not have to pick.
Stellar shipped the gap
Visual editor, native GA4, 5.4KB script, and a Sandbox plan. Launch a test the same day you sign up.
Also considering other tools? See Optimizely alternative and VWO alternative.
The visual editor Google Optimize took with it.
No developers. No tag managers. No deployment pipelines. Open the editor on your site, change copy or layout, set traffic allocation, and go live—the workflow Optimize teams already knew.
No-Code Visual Editor
Install one snippet and edit text, images, styles, and layout on the live page—the WYSIWYG Optimize used to give you.
Dynamic Keyword Insertion
Personalize landing page copy from URL parameters. Message match your ads automatically—a capability Optimize never had.
Custom JavaScript & CSS
Need more control? Add custom JS and CSS for the same granular tweaks you used in Optimize, without leaving the editor.
AI Editor Assistant
Let AI help you write headlines, CTAs, and copy variations. Generate ideas and create variants faster than a blank Optimize experiment.
Know what's working before you check the dashboard.
Stellar's AI analyzes experiment performance across devices, traffic sources, and time periods—then tells you exactly what to do next. Get confidence scores and actionable recommendations Optimize never offered.
Real-time results. Native GA4 integration.
See experiment data the moment visitors land. Break down performance by device type, UTM parameters, day of week, and hour of day. Keep GA4 in the loop the way you did with Optimize—without living in GA4 explorations.
Real-Time Data
See live results with a straightforward interface. Understand exactly what's happening with each variant as traffic flows in.
GA4 & Third-Party Integrations
Send experiment data to Google Analytics, Segment, Mixpanel, or any tracking tool via custom JavaScript hooks.
Easy Goal Setup
Set conversions in seconds. Choose goals based on page visits, clicks, or form submissions. No coding needed.
Multiple Conversion Tracking
Track different conversion events per experiment for a comprehensive view of results and down-funnel performance.
Know which clicks turn into customers.
Optimize showed experiment results. Stellar also shows which channels, campaigns, and on-page changes actually drive purchases. From the first visit to checkout, see the revenue impact of every experiment in one privacy-first dashboard.
See what gets attention—and what gets ignored.
Heatmaps show exactly where visitors click, how far they scroll, and what they skip. Know which elements drive action and which are costing you conversions.
No more blind spots: track the entire journey.
Map the complete customer journey across pages, forms, and checkouts. Spot exactly where visitors drop off and where revenue is leaking.
The lightest A/B testing script in the market.
At just 5.4KB and served on a CDN, Stellar is 25x smaller than competitors like VWO or AB Tasty—and lighter than most Google Optimize replacements that grew into full suites. Zero impact on page speed, Core Web Vitals, and SEO.
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.
Everything you need to run experiments.
Visual editor, targeting, stats, heatmaps, GA4. Easy to use, 5.4KB, priced in the open.
Privacy-First
Cookieless by default with DPA support. Stellar does not intentionally collect visitor names, emails, or form fields.
Advanced Targeting
Target by URL rules, device type, and country. Show experiments only to the visitors that matter.
Works Everywhere
Shopify, Webflow, WordPress, Wix, Framer, custom builds—one snippet and you're testing.
Statistical Confidence
Bayesian statistics built in. Know when you have a winner with real confidence—no guesswork.
“We never found a good replacement for Google Optimize until we found Stellar. Super easy to install and get campaigns running. We're running half a dozen campaigns with plans for plenty more.”
Justin F., Technical Director — digitalrelativity.com
Read on G2Try it before you commit.
Sandbox is free. No credit card. Most people have an account set up in minutes.
Frequently Asked Questions
Need help migrating from Google Optimize? Let's talk.
Book a 30-minute call and we'll show you how Stellar replaces Optimize for your team.
Book a Demo