About
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.
Why we built this
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.
Our values
What we stand for
Four commitments that decide what gets built, what gets cut, and what we charge for.
Accuracy
Simplicity
Performance
Fair pricing
Contact
Get in touch
A person reads every one of these.
No MTU surprises
See how we compare
Flat-rate pricing. Unlimited visitors. Every feature on every plan.
- 14-day free trial
- No credit card required
- Cancel anytime