Best Free AB Testing Software
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Compare the Top Free AB Testing Software as of October 2026
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What is Free AB Testing Software?
A/B testing software allows businesses to compare two or more versions of a webpage, app, or marketing campaign to determine which performs better based on user behavior and key metrics. It enables marketers and product teams to run controlled experiments by splitting traffic between variants and collecting data on conversions, engagement, and other goals. The software often includes tools for test setup, audience segmentation, real-time analytics, and statistical significance calculation. Many platforms integrate with analytics and marketing tools to help optimize user experiences and drive data-driven decisions. By leveraging A/B testing software, organizations can improve conversion rates, reduce bounce rates, and enhance overall customer satisfaction. Compare and read user reviews of the best Free AB Testing software currently available using the table below. This list is updated regularly.
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1
Flagsmith
Flagsmith
Flagsmith is the bucketing engine for your experiments. Your analytics stack stays where it is. Create a multivariate flag, define variants with percentage weights, and Flagsmith splits traffic deterministically. Bucketing is calculated per identity, so a user gets the same variant on every evaluation until you change the weights. Use segments to restrict a test to the users you want to target: a plan tier, a region, or a beta cohort. And you can use the same mechanism to run beta programmes for early feedback. Flagsmith does not collect events or compute significance. Instead, send the variant name to the analytics platform you already use. Flagsmith has built in integrations for Amplitude, Mixpanel, Segment, Heap and Rudderstack, or push to your own pipeline over webhooks. One source of truth for metrics instead of two. Works the same on our cloud, your private cloud, or on-premise.Starting Price: $45/month -
2
Evolv Al
Evolv Al
Evolv Al powers intelligent experiences that enable organizations to learn valuable insights from every session and improve conversions continuously. Easy to implement and integrate with any tech stack, Evolv AI produces exponential results. Our AI-powered platform uses innovative tools to scale the number of experiences delivered, automate the process of identifying the best experiences across the customer journey, and personalize each visitor’s sessions. Utilizing a proprietary machine learning engine and client visitor data, Evolv AI delivers on digital growth goals at a velocity that takes conversion optimization and personalization to an entirely new level. Why just A/B test when you can Evolv?Starting Price: $0/Year
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