Google officially announced the retirement of Google Optimize and Optimize 360, leaving users scrambling for an alternative.
GA4's built-in experiments lack the comprehensive testing capabilities needed for serious optimization work.
Without a visual editor, creating variations becomes a complex, code-heavy task requiring technical expertise.
Modern CRO requires more than basic testing - you need personalization, multiple goals, and detailed analytics.
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.
Our visual editor makes creating variations significantly easier than Google Optimize ever did. Perfect for marketers without coding skills.
A feature Google Optimize never had - personalize landing pages to match your ads with dynamic keyword insertion, improving conversion rates.
For more technical users, add custom JavaScript and CSS for the same level of control you had with Google Optimize.
Unlike Google Optimize's limited objectives, track multiple conversion events simultaneously to get a complete picture of test performance.
Set up conversion tracking in seconds with our intuitive interface - no need for complex Google Analytics configuration.
See real-time data with an intuitive interface - no need to navigate complex GA4 reports to understand your test performance.
Get the best of both worlds - use Stellar's intuitive interface while still sending data to GA4 for additional analysis.
Sign up for Stellar's free forever plan - no credit card required.
Install our lightweight script (just 5.4kb) on your website.
Use our visual editor to create variations - no coding required.
Up to 25k MTU
Built-in analytics
Visual web editor
Custom CSS & JS editor
AI editor assistant
Basic A/B testing
Limited variants & goals
Limited concurrent experiments
50k MTU included
Unlimited variants
Unlimited concurrent experiments
Advanced targeting rules
Dynamic keyword insertion
Priority support
Custom MTU volume
Custom solutions
Integrations support
Unlike competitors who charge in fixed large blocks, we dynamically bill in small increments of 1k MTU, ensuring you never overpay
Compared to average competitors like VWO's $4,700/year for 50k MTU, our equivalent annual cost is just $1,118
We only count users who actually see experiments. Multiple experiment views from the same user count as just 1 MTU