How is this different from Google Optimize?

Google Optimize was sunset in 2023. Experiment Flow is a modern replacement with better multi-armed bandit support, faster setup, and more affordable pricing.

Do I need to install anything?

Just add one script tag to your site. No npm packages, no build steps, no dependencies.

How does statistical significance work?

We use two-proportion z-tests with 95% confidence intervals. Results only show as significant when there is less than 5% chance the difference is due to randomness.

Can I use this server-side?

Yes. The REST API works with any language. There are official SDKs for Node.js, Python, Go, and Ruby.

A/B Testing Alternatives

Looking to switch from your current testing tool? See how Experiment Flow compares to the competition.

Shut Down

Google Optimize

Google Optimize shut down in September 2023. Migrate your experiments to Experiment Flow in minutes.

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$50K+/year

Optimizely

Enterprise features at 99% lower cost. No sales calls, no consultants, no complexity.

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$199+/mo

VWO

Faster page loads with our 2KB SDK vs VWO's 150KB. Plus multi-armed bandits included.

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Feature Flags

LaunchDarkly

Get feature flags AND proper A/B testing with statistical significance in one tool.

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Enterprise

AB Tasty

Skip the sales calls and custom quotes. Transparent pricing from day one.

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Split.io

Simpler feature flags with better experiment statistics and Thompson Sampling bandits.

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Ready to Switch?

Join thousands of teams who've simplified their A/B testing.

Get Started

Start running experiments today. Plans from $29/month.