Otter vs Mida
Lightweight A/B testing with a generous free tier. Here's an honest look at how we compare.
About Mida
Mida is a client-side A/B testing tool with a free plan for up to 100K monthly tested users. It offers a visual editor, split URL testing, and feature flags. The free tier is limited to 2 active tests and 2 projects, but it's a reasonable starting point for small sites.
Feature comparison
| Feature | Otter | Mida |
|---|---|---|
| Starting price | $39/mo | $0 (free tier) / $199–$399/mo (Growth) |
| Visitor limits | Unlimited on all plans | 100K MTU free, scales with paid tier |
| Overage charges | None | Must upgrade tier for more MTU |
| Projects included | 1–Unlimited (by plan) | 2 free, 5 Growth, Unlimited Enterprise |
| Active tests (free tier) | Unlimited | 2 |
| Billing model | Flat rate per project | Per monthly tested user (MTU) |
| A/B testing | ||
| Split URL testing | ||
| Visual editor | ||
| Revenue tracking | ||
| Statistical engine | ||
| Anti-flicker solution | Built-in | Manual snippet (not built-in) |
| Google Analytics 4 goals | ||
| Feature flags | ||
| Server-side variant assignment | ||
| Transparent, published pricing | ||
| GDPR compliance | GDPR-friendly (per their site) |
Information based on publicly available data as of March 2026. Features and pricing may change — check Mida's website for the latest.
The bottom line
Mida's free tier is a strong entry point for small sites under 100K monthly visitors. Once you grow past that, pricing jumps to $199–$399/mo with ongoing MTU caps.
Otter charges a flat rate per project with no visitor limits. For sites with growing traffic, this means predictable billing that doesn't scale with your success.
On the technical side, Otter uses server-side variant assignment for consistent bucketing across sessions for the same visitor, while Mida assigns variants in the browser using client-side JavaScript.
Otter vs Mida — common questions
Is Otter cheaper than Mida?
It depends on traffic. Mida is free up to 100,000 monthly tested users with two active tests. Above that, Mida's Growth plan starts at $199/mo with MTU caps. Otter is $39/mo flat with unlimited visitors and unlimited active tests, so for any site running more than two tests or expecting growth past Mida's free tier, Otter is materially cheaper.
Does Mida support unlimited active tests?
No. Mida's free plan caps active tests at two. Otter has no cap on active tests on any plan.
Can I migrate from Mida to Otter?
Yes. Both tools use a single script tag and visual editor, so migration is mostly: install the Otter snippet, rebuild your active tests in the Otter wizard, finish any in-flight Mida experiments, then remove the Mida snippet.