Stellar

A lightweight, no-code A/B testing tool for websites, free.

About Stellar

Stellar is a no-code A/B testing platform for marketers, agencies and growth teams who want to run experiments on any website without developer involvement. It offers a visual editor for creating and launching tests, real-time analytics, heatmaps and AI-powered insights. The vendor emphasizes speed and minimal impact on site performance, using a 5.4KB script that is privacy-conscious and cookieless by default. Stellar has a free tier with basic functionality, and paid plans add features such as heatmaps, funnels and AI recommendations.

Best for: CRO marketers, growth teams, digital agencies, marketing directors

Key features

Visual editor enables A/B test setup without coding or developer help
AI assistant generates copy and variant ideas for experiments
Real-time analytics with breakdowns by device, UTM, and time
Heatmaps and funnels visualize user behavior and conversion paths
Privacy-focused, cookieless tracking by default
Vendor says it works with every platform using a single script
Personalizes landing page copy from URL parameters
Advanced targeting by URL, device, and country

Use cases

Running A/B tests on landing pages to improve conversions
Analyzing user behavior with heatmaps and funnels
Personalizing website content for different ad campaigns
Using AI to draft and test new headlines or CTAs
Tracking multiple conversion events per experiment

Pros

Free tier available with basic features
Vendor says its 5.4KB script has minimal impact on site speed
Vendor says no developer is required for setup or test deployment
Vendor describes tracking as privacy-conscious and cookieless by default

Limitations

Free tier lacks heatmaps, funnels, and AI insights

Screenshots

Reviews

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