Is this your app?

Claim Stellar to manage its page, add your badge and see your traffic — free, and it stays free.

Cycling through all six. Tap any point to stop.

Measured on six things

Lightweight A/B testing platform with no-code visual editor for fast, simple website optimization.

Accessibility

Meets basic web standards with keyboard navigation but lacks screen reader optimization and advanced accessibility features for the visual editor.

About this app

Stellar is a breath of fresh air in the often-overcomplicated world of conversion rate optimization, designed specifically for marketers who want to run tests without technical headaches. Its standout feature is the incredibly lightweight 5.4KB script that ensures negligible impact on site performance while delivering professional-grade testing capabilities. The platform bundles essential features like dynamic keyword insertion, custom JS/CSS support, real-time analytics, and AI-powered conversion insights into an intuitive package. What truly sets Stellar apart is its generous free tier for sites under 25k monthly users, making sophisticated A/B testing accessible to growing businesses. The clean, modern interface with point-and-click editing makes test creation surprisingly straightforward, while the real-time preview functionality eliminates guesswork. For teams prioritizing quick experimentation and clear results over advanced features they might never use, Stellar hits the sweet spot between simplicity and power.

Key features

1Lightweight 5.4KB script with negligible performance impact
2No-code visual editor with point-and-click test creation
3Real-time analytics with AI-powered conversion insights
4Generous free tier for sites under 25k monthly users

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Small to medium business marketers

Pain points

Overwhelming complexity of enterprise testing tools, slow page load times from heavy scripts, limited budgets for CRO software

Primary needs

Straightforward testing process, minimal performance impact, cost-effective solution

Demographic

CRO specialists and growth hackers

Pain points

Time-consuming setup processes, lack of real-time results, limited integration options with existing martech stack

Primary needs

Rapid experiment deployment, actionable insights, seamless platform integrations

Demographic

E-commerce store owners

Pain points

Cart abandonment issues, ineffective product page layouts, difficult testing implementation on platforms like Shopify

Primary needs

Shopify integration, visual editor for non-technical users, clear conversion improvement data

Scout Review

Written by AI from measured evidence, scored out of 100.

Stellar excels at delivering professional-grade A/B testing without the complexity that often plagues enterprise solutions. Its standout features include the incredibly lightweight script that preserves site performance, the intuitive no-code editor that empowers marketers, and real-time analytics that provide immediate insights. The platform's generous free tier makes sophisticated testing accessible to growing businesses, while the clean interface reduces the learning curve typically associated with CRO tools.

Measure by measure

Usability

100

Exceptional no-code visual editor with point-and-click element selection and real-time preview that eliminates guesswork in test creation.

Design

Clean, modern dashboard with intuitive navigation and color-coded analytics that make statistical significance easy to understand for non-technical users.

Speed

100

Lightweight 5.4KB script delivers negligible performance impact with real-time analytics updating within seconds of user interactions.

Security

GDPR compliant architecture with secure HTTPS connections and clear data retention policies, though detailed encryption documentation is limited.

Accessibility

Meets basic web standards with keyboard navigation but lacks screen reader optimization and advanced accessibility features for the visual editor.

Growth

Strong positioning in growing CRO market with generous free tier attracting SMB users migrating from sunsetted tools like Google Optimize.

Improvement areas

Limited accessibility features for visually impaired users
Single-language interface restricts global team usage
Sparse integration options beyond major platforms
No mobile application for on-the-go monitoring

Design & Usability

Stellar's interface immediately impresses with its clean, modern dashboard that makes A/B testing feel approachable rather than intimidating. The visual editor uses intuitive point-and-click functionality that lets marketers create variations without touching code, while the real-time preview eliminates the guesswork that often plagues testing tools. The analytics dashboard presents complex statistical data through color-coded graphs that even non-technical users can interpret quickly. Navigation follows a logical linear flow from test creation to results analysis, making the platform surprisingly easy to master for first-time users.

Speed & Security

Performance is where Stellar truly shines—the 5.4KB script delivers on its lightweight promises with negligible impact on page load times, a crucial factor for maintaining user experience during experiments. Security fundamentals are solid with GDPR compliance built into the architecture and secure HTTPS connections for all data transmission. The real-time analytics engine processes results within seconds rather than the hour-long delays common in competing tools, giving marketers immediate feedback on test performance. While detailed encryption documentation is sparse, the platform's clear data retention policies and compliance measures provide reasonable assurance for most business needs.

Accessibility & Growth

Accessibility represents Stellar's primary area for improvement—while the platform meets basic web standards with keyboard-navigable interfaces, it lacks advanced features like screen reader optimization for the visual editor. Language support is currently limited to English, which may hinder global marketing teams. However, growth potential is excellent with strong market positioning in the expanding CRO space and a generous free tier that's perfectly timed to capture users migrating from sunsetted tools like Google Optimize. The platform's focus on simplicity and performance aligns well with current market demands for lightweight, user-friendly testing solutions.

Conclusion

If you're a marketer tired of wrestling with overcomplicated testing tools or a business owner concerned about site performance impact, Stellar offers a refreshingly straightforward solution. The combination of speed, simplicity, and actionable insights makes it ideal for teams that prioritize quick experimentation over advanced features they might never use. Give the 21-day free trial a spin—you might just find it becomes your go-to testing platform for driving meaningful conversion improvements without the technical headaches.

Suggestions for improvement

Implement comprehensive screen reader support and WCAG compliance for the visual editor interface
Add multi-language dashboard support to accommodate global marketing teams
Expand integration ecosystem beyond current partners like GA4 and Shopify
Develop mobile application for on-the-go test monitoring and result tracking

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Stellar	Optimizely	VWO	Google Optimize
Script Size & Performance Impact	5.4KB - Negligible impact	50-100KB - Moderate impact	45KB - Noticeable impact	35KB - Light impact (Sunsetted)
Free Tier Availability	Free for sites under 25k users/month	Limited free trial only	30-day free trial	Completely free (Sunsetted)
No-Code Visual Editor	Full no-code point-and-click editor	Advanced visual editor with coding options	Comprehensive visual editor suite	Basic visual editor (Sunsetted)
Target User Complexity	SMB marketers & non-technical users	Enterprise teams with technical resources	Mid-market to enterprise with mixed skills	Google ecosystem users (Sunsetted)