Optimizely alternative that is faster, simpler and more affordable
Stellar delivers all the experimentation tools you need at a fraction of the cost — without sacrificing performance. Our 5.4KB script ensures your site stays fast, so you can focus on running tests, improving conversions, and scaling your business.
🚀 Loved by CRO marketers
Works with your favorite tools
Here's a head-to-head comparison
We don't force you to a higher plan. Grow with us and upgrade as you need.
Forever free up to 25,000 visitors
Our snipper is extremely small and lightweight
Stellar script is at least 10 times smaller than most other A/B testing platforms, including Optimizely. It loads instantly without affecting your site performance and SEO ranking.
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.
Create variations without writing a single line of code
Perfect for marketers who don't want to rely on developers and prefer to deploy changes themselves. Start testing and optimizing without waiting on your frontend team.
No-code visual editor
Install our snippet to access a WYSIWYG editor directly on your site. Works with any website.
Dynamic Keyword Insertion
Personalize your landing pages copy with dynamic keyword insertion. Great for PPC campaigns. Zero coding required.
Custom JS and CSS
Add custom JavaScript and CSS for more granular control over your page. Perfect for advanced tweaks and precise adjustments.
Easy Goal Setup
Set your goals in seconds with a simple interface. Choose from page visits, time spent on a page, or specific user actions—no coding needed.
Advanced Goal Tracking
Track custom user events like button clicks, form submissions, or video plays. Combine multiple goals for a more comprehensive view of performance.
Track conversions, effortlessly.
Unlike Optimizely's complex setup, Stellar makes conversion tracking simple and accurate.
Why choose Stellar over Optimizely?
Why users switched from Optimizely to Stellar
Harrison C.
⭐️⭐️⭐️⭐️⭐️
Stellar let us test features without relying on Dev, and we saw a 25% improvement on our signup page. For marketers, it's easy, fast, and super supportive—give it a go!
Ash S.
⭐️⭐️⭐️⭐️⭐️
The simplicity of the platform is on-point. The No-BS design really takes the complexity out of A/B testing.
Jordan S.
⭐️⭐️⭐️⭐️⭐️
My experience with Stellar has been great! The platform is lightweight, integrates seamlessly with GA4, and has given me insights I wouldn't have had otherwise.
Tomas C.
⭐️⭐️⭐️⭐️⭐️
After Google Optimize was sunset, we tried VWO, AB Tasty, and others, but none fully met our needs. Stellar is different—easy to use, quick to set up, and provides all the reporting we need.
Elizabeth R.
⭐️⭐️⭐️⭐️⭐️
Was looking for a Google Optimize replacement with WYSIWYG editor for A/B tests, Stellar has exceeded my expectations so far!
Conor D.
⭐️⭐️⭐️⭐️⭐️
It's easy to set up and use. Friendly UI/UX and has all of the tools and capabilities you would want in an A/B testing platform.
Pricing
Free
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
Pro
50k MTU included
Unlimited variants
Unlimited concurrent experiments
Advanced targeting rules
Dynamic keyword insertion
Priority support
Enterprise
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