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.

Shut Down

Google Optimize Alternative

Google Optimize shut down. Your A/B tests don't have to.

Experiment Flow vs Google Optimize

Feature	Experiment Flow	Google Optimize
Status	Active	Shut down Sept 2023
Price	$0/mo to start	Was free
Setup Time	5 minutes	Was ~10 minutes
Statistical Significance	✓ , with p-values	Limited
Multi-Armed Bandits	✓ (Thompson Sampling)	✗ No
SDK Size	<2KB	Was ~50KB
Cookie-free Option	✓ Yes	✗ No
API Access	Full REST API	Limited

Why Switch to Experiment Flow

Seamless Migration

Import your existing experiments and get running in minutes. Our SDK is even simpler than Google Optimize's snippet.

Still Free to Start

Like Google Optimize, we offer a generous free tier. No credit card required to get started.

Better Statistics

Proper hypothesis testing with p-values and confidence intervals - something Google Optimize lacked.

No Sunset Risk

We're an independent company focused solely on A/B testing. This is our core business, not a side project.

Ready to Switch from Google Optimize?

Get started in 5 minutes. No credit card required.

Start Free Trial

Free forever with generous limits. Paid plans from $29/month.