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.

💳 No credit card required
⚡️ Lightest in the market at 5.4kb
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🚀 Loved by CRO marketers

Works with your favorite tools

shopify
webflow
ga
woocommerce
wordpress
wix

Here's a head-to-head comparison

We don't force you to a higher plan. Grow with us and upgrade as you need.

Feature
Stellar
$99/m
billed annually
Optimizely
$ Talk to sales
billed annually
Number of Tested Users
100,000
Talk to sales
Charging Model
Pay-as-you-go (+$2/1k MTU)
Talk to sales
Web Experimentation (A/B Test)
Unlimited Variations
OS/User/Traffic Targeting
Download/Share Summary Report
Campaign Data Retention
Unlimited
Talk to sales
Cross-domain Testing and Tracking
Talk to sales
Campaign Scheduling
Talk to sales
Personalize Text
Talk to sales
Behavioral Targeting
Talk to sales
Multivariate Testing
Coming soon
Talk to sales
Personalization for Web
Deploy Rollouts for Web

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.

Stellar (0ms)
VWO (100ms)
Optimizely (150ms)
ABlyft (180ms)
Convert (200ms)
Performance impact on LCP in milliseconds

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?

Ease of use. Clutter-free. To the point.
Lightning-fast load time thanks to CDN caching.
GDPR compliant. No use of cookies.
Free forever, under 25k monthly tracked users.
watch our quick demo :)

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

$0 USD/mo.

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

30 day free trial

Pro

$99 USD/mo.
billed annually
Everything in Free, plus:

50k MTU included

Then easily scale with +$2/mo for every additional 1k MTU

Unlimited variants

Unlimited concurrent experiments

Advanced targeting rules

Dynamic keyword insertion

Priority support

Enterprise

Custom
Everything in Pro, plus:

Custom MTU volume

Tailored pricing for high-volume needs

Custom solutions

Integrations support

✓ Pay Only For What You Use

Unlike competitors who charge in fixed large blocks, we dynamically bill in small increments of 1k MTU, ensuring you never overpay

✓ 4x More Cost-Effective

Compared to average competitors like VWO's $4,700/year for 50k MTU, our equivalent annual cost is just $1,118

✓ Fair MTU Counting

We only count users who actually see experiments. Multiple experiment views from the same user count as just 1 MTU

Frequently Asked Questions

Ready to switch from Optimizely? Let's talk