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.

Experiment Flow

Split.io

Split.io Alternative

Feature flags and experiments, simplified.

Experiment Flow vs Split.io

Feature	Experiment Flow	Split.io
Starting Price	$0/mo	Free tier limited
Feature Flags	✓ Yes	✓ Yes
A/B Testing	✓ Yes	✓ Yes
Statistical Significance	✓ (p-values)	Basic
Multi-Armed Bandits	✓ Yes	✗ No
SDK Size	<2KB	~25KB
Setup Time	5 minutes	Hours
Auto-promote Winner	✓ Yes	✗ No

Why Switch to Experiment Flow

Simpler Setup

Split.io requires SDK installation and configuration. We offer a drop-in script tag option.

Better Statistics

Get proper statistical significance with p-values, not just metric comparisons.

Lower Cost

Split.io pricing scales with events and users. Ours is simple: $29/seat.

Multi-Armed Bandits

Automatically optimize traffic with Thompson Sampling - a feature Split.io lacks.

Ready to Switch from Split.io?

Get started in 5 minutes.

Get Started

Plans from $29/month. Unlimited experiments included.