# A/B testing that respects your traffic and your budget

Most A/B testing tools charge you more as your site grows. We built Otter because we think that's backwards. You should pay for what you use, not be taxed on your success.

## The problem with A/B testing pricing

We've run A/B tests for years across e-commerce, SaaS, and content sites. The tools were always the same: powerful enough, but with pricing designed to scale against you.

Hit 100K visitors? Time to upgrade. Cross 500K? Another tier. Run a successful campaign that drives traffic? Congratulations — here's a bigger invoice. The industry calls this "MTU-based pricing" (Monthly Tested Users), and it means the better your site performs, the more you pay for the exact same tests.

We built Otter on a different principle: **charge for projects, not visitors**. Every plan includes unlimited tests, unlimited visitors, and the full feature set. The only difference between plans is how many projects you can run.

The result is a testing platform where you can focus on learning what works, without watching a usage meter or worrying about overage charges at the end of the month.

## Our Mission

> "Too many product decisions are made on intuition. We built the A/B testing platform we wanted to use: fast to set up, statistically rigorous, and clear about when results are decision-ready."
>
> — The Otter Team

## What we stand for

### Accuracy

Statistical rigor is non-negotiable. We use established frequentist methods, adjusted decision thresholds, and transparent sample-size estimates. No vanity metrics, no hardcoded confidence shortcuts.

### Simplicity

One line of code to install. Five minutes to your first test. Complexity is the enemy of experimentation — we keep the interface focused and the setup fast.

### Performance

Our SDK is under 9KB with built-in anti-flicker and async loading. Your visitors should never know they're being tested.

### Fair pricing

We charge per project, not per visitor. Your bill doesn't go up just because your traffic does. No MTU caps, no overage charges, no surprises.

## See how we compare

Flat-rate pricing. Unlimited visitors. No MTU surprises.

- [View Pricing](https://www.otterab.com/pricing)
- [Start Free Trial](https://www.otterab.com/signup)

## Get in touch

- Get in touch: hello@otterab.com
- Sales: sales@otterab.com
- Support: support@otterab.com