# Test a change before you keep it.

> Run A/B tests on a page or in your code, judged on the goal you pick, and roll changes out with feature flags. One script, hosted in Germany, in every plan.

URL: https://mirafive.io/product/experiments

1. [Home](https://mirafive.io/)
2. [Product](https://mirafive.io/#product)
3. Experiments and flags

A/B tests and feature flags on the same script, judged on the goal you pick.

[Start free](https://app.mirafive.io/register)[See pricing](https://mirafive.io/pricing)

Sample data: a page experiment on the checkout button, decided by the goal “Order paid”. The original reached it for 49 of 1,204 people (4.1 %), variant B for 71 of 1,188 (6.0 %). Result: variant B wins, at least 3 % more often and about 47 % more often, with a 95 % range from +3 % to +110 %.

MIRA FIVE tests one change against the original, split 50/50, and decides once, after the planned end and its window, on a goal you pick. Feature flags roll changes out to a share of people and turn them off again, on the same script.

## On a page or in your code

Mark two versions in your HTML, and a snippet in the head shows one before the page draws. Or read the experiment as a flag in your app or on your server.

```
<button data-mirafive-experiment="checkout-button"
        data-mirafive-variant="a">Place order</button>
<button data-mirafive-experiment="checkout-button"
        data-mirafive-variant="b">Pay now</button>
```

## Planned up front, judged once

Pick 2, 3, 4, 6 or 8 weeks and a window to reach the goal. The verdict comes after that, never while counting.

1. ### Plan  
Pick the goal, 2 to 8 weeks and a window. The planner shows the smallest change it can find.
2. ### Count  
Half see the original, half see B. A daily check watches the split and warns of harm.
3. ### Decide  
After the planned end and its window, one verdict: better, worse, no big difference or no clear winner.

## Feature flags on the same script

On/off, variants and remote config, in the website or on your server. Roll out to 25 % of people, then everyone, or turn it off with one switch.

Sample data: four feature flags. new-checkout is on for 25 % of people; free-shipping-banner serves everyone and is ready to remove; onboarding-steps serves two variants; trial-days is remote config serving the number 14.

## Questions this page answers.

- How do I run an A/B test on my website without a separate tool?
- How long should an A/B test run?
- Can an A/B test be decided by paid orders instead of clicks?
- How do feature flags roll a change out to some users?
- Do A/B tests need consent?
- Can I start an experiment from Claude or Cursor?

## Questions about experiments and flags.

### Which goal decides an experiment?

One goal or action you pick when you plan it, such as a sign-up or a paid order. Buyers and revenue are shown beside the result.

### Why is there no live winner?

Because peeking picks false winners. MIRA FIVE counts to the planned end and its window, then takes one verdict at 95 %, with a range for the size of the change.

### Do experiments need consent?

Yes. People are counted once they agree to statistics and experiments, or from your server. Before that a visitor sees the original or a random variant, and nothing is stored.

### Are experiments included in Free?

Yes, every plan has experiments and feature flags. On Free an experiment runs at most three weeks, and visitors entering a test never count against your events.

### Can Claude start an experiment?

Yes, once you allow it. Creating one needs “May change setup”; starting, ending or switching flags also needs “May turn flags on and off”. Both are off by default.

## The other questions

- [PeopleEvery visitor and buyer, with their whole path](https://mirafive.io/product/people)
- [AcquisitionChannels, campaigns and ad spend, counted in buyers](https://mirafive.io/product/acquisition)
- [JourneysFrom first click to purchase, page by page](https://mirafive.io/product/journeys)
- [Goals and revenueBuyers, revenue and who is about to buy](https://mirafive.io/product/goals)
- [AI agentsAsk Claude or Cursor about your numbers](https://mirafive.io/agents)

## Keep only the changes that work.

Add the script, mark two versions, pick a goal. The result comes after the planned end.

[Start free](https://app.mirafive.io/register)[Talk to us](mailto:hello@mirafive.io?subject=MIRA%20FIVE)