An Optimizely alternative for web tests, not a DXP.
Need web A/B testing without a six‑figure DXP quote? Stellar is self‑serve, 5.4KB, publicly priced, and starts in a free sandbox. It does not replace Optimizely Feature Experimentation, Full Stack, Rollouts, or CMS.
Full web experimentation. A price you can use.
Optimizely is a strong platform with a sales-led price. Stellar gives performance and CRO teams the same core work: run A/B tests on live pages, read the results, keep going. Tiers are on this page. Sandbox is free.
Public pricing and a free sandbox.
Install one snippet, open the visual editor, and launch. Visual editor, targeting, stats, heatmaps, GA4. Built for marketers and agencies who run tests every week, at a price they can actually keep paying.
Custom quotes, annual contracts.
A capable Web Experimentation product inside a larger portfolio. Getting in usually means a demo, a quote, and an annual commitment. Strong if you need the full platform. If you need web testing that is easy to use and priced in the open, that is Stellar.
| Compare | Stellar | Optimizely |
|---|---|---|
| Pricing | Published on this page. Free sandbox to start. | No public list price. Custom quote via talk-to-sales. |
| Time to first test | Install the snippet and launch in minutes. | Sales conversation, then implementation is commonly part of year one. |
| Web A/B testing | Visual editor, targeting, stats, GA4. | Web Experimentation. |
| Feature flags / full stack | Not what Stellar is. | Feature Experimentation and Rollouts. |
| CMS / DXP | Not what Stellar is. | Separate Optimizely CMS products. |
| Script | 5.4KB, served on a CDN. | Heavier platform tag. |
| Contract | Self-serve, monthly or annual. | Annual or multi-year contracts. |
Reported 2026 buyer estimates for standalone Web Experimentation start around $36,000–$80,000/year, with a Vendr median near $81,000. Those are third-party figures, not Optimizely list prices. Read the full Optimizely pricing breakdown.
Also comparing a Google Optimize alternative or a VWO alternative?
From hypothesis to live experiment in under 5 minutes.
No developers. No wait for a quote. Open our visual editor directly on your site, make your changes, set traffic allocation, and go live.
No-Code Visual Editor
Install one snippet and access a WYSIWYG editor directly on your site. Change text, images, styles, and layout without touching code.
Dynamic Keyword Insertion
Personalize landing page copy from URL parameters. Message match your ads automatically. Zero coding required.
Custom JavaScript & CSS
Need more control? Add custom JS and CSS for granular adjustments. Perfect for advanced experiments and precise tweaks.
AI Editor Assistant
Let AI help you write headlines, CTAs, and copy variations. Generate ideas and create variants faster than ever.
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 to guide your CRO decisions.
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. Integrates directly with GA4, Segment, and Mixpanel.
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.
Stellar doesn’t just track clicks—it shows you 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. Optimizely ships a heavier platform tag. 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.
“GoStellar is incredibly easy to use, even for non‑developers, with a great interface and design. I can set up and run experiments within five minutes, and the self‑serve capabilities make it highly valuable.”
Tom Y., Digital Marketing Manager — speechmatics.com
Read on G2Seamless adoption and fast results.
“It’s exactly what we were looking for. No fluff, easy setup, and a free way to test before committing. I can’t say enough positive things about the product and we’re using it across every client now and it’s perfect. It's affordable, intuitive, and it simply does what it says it's going to do.”
Charles Wagner, Performance Marketer
Read full postTry it before you commit.
Sandbox is free. Paid plans are listed below. A demo is optional, not the front door.
Visual editor means zero developer dependency. Launch experiments in minutes.
Works with everything. WordPress, Webflow, Shopify, custom builds—all covered.
AI insights and real-time analytics reveal the truth. Then test a fix in minutes.
Statistical confidence ties every test to real outcomes. No guessing, just data.
Frequently Asked Questions
Still comparing Optimizely? Let's talk.
Book a 30-minute call if you want a walkthrough — or skip it and start for free.
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