# Otter vs Mida Lightweight A/B testing with a free tier for small sites. Looking for a Mida alternative? Here's an honest, fact-checked look at how the two A/B testing tools compare. ## About Mida Mida is an A/B testing platform founded in 2023 and positioned, like Otter, as a Google Optimize replacement. It offers a visual editor, split URL testing, feature flags, and mobile SDKs, with a free tier for smaller sites and paid plans priced per monthly tested user (MTU). Like Otter, it publishes its pricing — credit where due. ## Which should you pick? **Choose Otter if:** - You want a bill that stays flat as traffic grows — $39/mo with unlimited visitors and unlimited active tests - You want GA4 events as experiment goals, not just an event export to GA4 - You want revenue tracking with multi-currency conversion and a published statistical methodology - You want targeted content personalization as a first-class test type **Choose Mida if:** - You're starting out and want a free plan for a low-traffic site - You need feature flags, multi-armed bandits, or mobile app SDKs alongside web testing ## Feature comparison | Feature | Otter | Mida | | --- | --- | --- | | Starting price | $39/mo flat | Free tier; Growth from $299/mo (annual) at 100K MTU | | Visitor limits | Unlimited on all plans | Metered per monthly tested user (MTU) | | Cost as traffic grows | Unchanged | Scales with MTU (e.g. ~2x at 200K MTU) | | Active tests | Unlimited on all plans | 2 on free tier; unlimited on Growth | | Projects | 1 to unlimited, by plan | 2 on free tier; 5 on Growth | | A/B and A/B/n testing | Yes | Yes | | Split URL testing | Yes | Yes | | Visual editor | Yes | Yes | | Content personalization test type | Yes | Not advertised | | Feature flags | No | Yes | | Multi-armed bandits | No | On Growth plan and above | | Revenue tracking | Built-in, with multi-currency conversion | Yes | | GA4 integration | GA4 events usable as experiment goals | Export-only (pushes events to GA4) | | Statistical methodology | Published: frequentist or Bayesian, per test | Statistical engine advertised; methodology not published | | Free trial | 14 days, no credit card | Free tier; 15-day Growth trial | | Transparent, published pricing | Yes | Yes | Information based on publicly available data as of July 2026, verified against Mida's published pricing. Features and pricing may change — check Mida's website for the latest. ## Two self-serve tools, two pricing models Mida deserves credit for doing what most testing vendors won't: publishing real prices. Its free tier covers up to 100,000 monthly tested users with two active tests and two projects, and its Growth plan starts at $299/mo billed annually ($399 billed monthly) at 100K MTU — roughly doubling to $599/mo as you cross 200K MTU, because billing is metered per tested visitor. Otter's model is flat: $39/mo for one project, $79/mo for five, $149/mo for unlimited projects, with unlimited visitors and unlimited active tests on every plan. The honest math: for a low-traffic site running one or two experiments, Mida's free tier is hard to beat. For a site with real traffic — or one that expects growth — a flat bill that never moves beats a meter that doubles when your marketing works. ## What's genuinely comparable, and what isn't Both tools cover the core well: visual editor, split URL tests, revenue tracking, and a modern script (Mida advertises a 15KB snippet with anti-flicker technology; Otter loads async with a snippet-level hide that auto-removes with a 3-second failsafe). Mida also has things Otter doesn't: feature flags, multi-armed bandits on paid plans, and native mobile SDKs. Otter's advantages sit in the measurement layer. Content personalization is a first-class test type — build a targeted variant in the visual editor and serve it to a segment. Revenue goals convert multiple currencies into one reporting currency. And five goal types (pageview, click, custom event, revenue, GA4 event) mean conversions you already track in GA4 plug in directly as experiment goals; Mida's GA4 integration works the other way, exporting its events into GA4. ## Statistics you can audit Otter publishes exactly how results are computed: choose frequentist or Bayesian analysis per test. Frequentist tests use a two-proportion z-test — Fisher's exact test for small samples — at 80/90/95/99% confidence, with thresholds automatically Bonferroni-adjusted when a test has multiple challengers so A/B/n tests don't inflate false positives. Bayesian tests report each variant's chance to beat control. Auto-stop rules can end tests on significance, visitor limits, or conversion caps. Mida advertises a statistical engine, but as of July 2026 we couldn't find its methodology documented publicly. That doesn't mean it's wrong — it means you can't audit it. If your team needs to defend results to stakeholders, a published methodology matters. ## Migrating from Mida to Otter Both tools use a single script tag and a visual editor, so migration is mostly mechanical: install the Otter snippet, rebuild your active tests in the Otter wizard, let in-flight Mida experiments finish, then remove the Mida snippet. Historical results stay in Mida — plan to screenshot or export anything you'll want later. ## The bottom line Mida is a credible, transparently priced competitor with a generous free tier — for small sites, it's a reasonable place to start, and its feature flags, bandits, and mobile SDKs go places Otter doesn't. Otter wins on the economics of growth and the measurement stack: flat per-project pricing with unlimited visitors and tests, GA4 events as goals, multi-currency revenue tracking, personalization, and a fully published statistical methodology. If your traffic is small and your needs simple, use Mida's free tier. When testing becomes part of how you operate, Otter's flat pricing and deeper measurement are built for that. ## Try Otter free for 14 days No credit card required. No visitor limits. Set up in under 5 minutes. - [Start Free Trial](https://www.otterab.com/signup) - [View Pricing](https://www.otterab.com/pricing) ## Frequently asked questions ### Is Otter cheaper than Mida? For small sites, no — Mida's free tier covers up to 100,000 monthly tested users with two active tests. Above that, Mida's Growth plan starts at $299/mo billed annually at 100K MTU and scales with traffic (roughly $599/mo at 200K MTU). Otter is $39/mo flat with unlimited visitors and unlimited active tests, so the crossover comes quickly once you're paying. ### Does Mida support unlimited active tests? On its Growth plan, yes; the free tier is limited to two active tests and two projects. Otter has no cap on active tests on any plan, including during the trial. ### Can I migrate from Mida to Otter? Yes. Both tools use a single script tag and a 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. ### Does Otter really have no visitor limits? Yes. Otter's plans differ only by project count and API rate limits. There is no visitor metering anywhere in the product — no MTU caps, no overage charges, no upgrade triggers tied to traffic.