runab
For builders who ship

A/B testing for builders.

Other tools are built for marketing teams with dashboards and reports. runab is built for builders who need answers.

app.tsx
import { useVariant, trackConversion } from '@runab/sdk'

function Hero() {
  const variant = useVariant('hero-test')
  
  return (
    <section>
      <h1>{variant === 'A' ? 'Start free today' : 'Try it now'}</h1>
      <button onClick={() => trackConversion('hero-test')}>
        Get started
      </button>
    </section>
  )
}

That's it. No configuration files. No environment variables. No setup.

How it works

1

Add the SDK

1.2kb gzipped. Zero dependencies. One line of code.

2

Create a test

Define two variants. Set a conversion event.

3

Ship it

Traffic splits automatically. No configuration.

4

Get your answer

See which variant wins. Ship the winner.

What you get

Everything you need to run a test. Nothing you don't.

Zero flicker

Edge middleware assigns variants before the page loads. No layout shifts.

1.2kb SDK

Tiny footprint. Zero dependencies. Works with every framework.

One conversion goal

Track what matters. Page view, click, or custom event.

Statistical significance

We tell you when you have enough data to decide.

What we intentionally don't do

These aren't missing features. They're decisions.

Dashboards — You don't need charts to know which button works better.
User segmentation — For most tests, 50/50 traffic split is all you need.
Funnel analytics — You already know your funnel. We just test the variants.
Team seats & permissions — You're a builder. You don't need approval workflows.
Multivariate testing — A vs B. That's it. Complexity kills velocity.

If you need enterprise features, complex segmentation, or marketing workflows, tools like Optimizely or VWO are built for that. We're built for shipping.

Simple means focused

Most A/B testing tools try to be analytics platforms. They give you dashboards, funnels, heatmaps, session recordings, and a dozen features you'll never use.

runab does one thing: helps you pick between two options.

That's not a limitation. That's the point.

Ready to ship faster?

Start testing in under 2 minutes. No credit card required.

Start your first testView pricing