Free tool

Compare two headlines before you ship one

Paste two headlines. The same 25 simulated readers, matched to who it is for, react to both, and Mimiq says which one to ship, or that it is too close to call.

The same 25 simulated people read both, matched to who the headline is for.

First test free

How do I know which headline is better before I publish?

Show both to the same simulated readers and compare. Each person reacts to each version in their own words, and Mimiq makes one of three calls: a clear pick, a leaning pick, or too close to call. It is a fast check before you spend real traffic, not a replacement for an A/B test.

Why picking a headline by gut fails

The team that wrote the headline already knows what the product does, so every version reads clearly to them. Readers arrive cold, scanning a feed, and decide in a second whether a line is for them. A split test answers that, but it needs traffic you may not have yet, and days you may not want to wait.

  • Two headlines, one set of simulated readers: the only difference is the line itself.
  • Each person says which one they would click and why, in their own words.
  • Mimiq makes a call: clear, leaning, or too close to call. A tie is an honest answer.
  • See who changed their mind between the versions, and ask them follow-up questions.

How it works

  1. 01

    Paste both headlines

    Your current line as A and the one you are considering as B. Short lines work best: a headline, a tagline, a hero sentence.

  2. 02

    Check who reads it

    Mimiq matches the readers to who the headline is for. Describe them in plain words if you have a specific audience in mind.

  3. 03

    Read the call

    The comparison shows which version won over more people, how sure the call is, and what people said about each.

How the call works

Both versions run on the same simulated people, so differences come from the words, not from a different crowd. Mimiq compares how each person reacted to A and to B and makes a call only when the difference is large enough: clear when most people moved the same way, leaning when the evidence points one way but is close, and too close to call when it could go either way.

You can open the full comparison, see each person side by side, and interview anyone about why they preferred one line.

The evidence, and its limits

Headlines are the one place Mimiq has public evidence: a pre-registered benchmark on historical headline A/B tests, with every registered run published, including the ones that did not work. See the benchmark page for the method and results, or try the daily game on real headline tests.

That evidence is about headlines. It says nothing about conversion rates, emails, ads or whole pages, and simulated readers are not real people. Use the call to decide what to test with real traffic, and to drop weak lines early.

25people per test, matched to who you sell to. Edit the audience before you run, or import your own customers.
76%right on 1,000 real headline A/B tests it was not built on: Mimiq's forecast, pre-registered. The best rule of thumb got 61%. On emails, ads and web pages it has not held up in pre-registered tests, and it predicts the direction, not the size of the lift.
$0for your first test, with a free account. A free account includes 50 credits, no card. Credit packs from $9 after that, and they never expire.
Read the benchmark, including the misses

Questions

Is it free?

Your first test is free: sign in with Google and it starts right away. A free account includes 50 credits, no card.

Can I test more than two?

Compare two at a time. Keep the winner and compare it with the next idea, on the same readers, so each step is a fair fight.

Does it work for email subject lines or ads?

You can run them, and the readers will react, but the public evidence is about headlines. Treat subject lines and ad copy as directional.

What if it says too close to call?

Then the difference is not large enough to trust. Pick on other grounds, or write a version that differs more and compare again.

Keep reading

Hear which words land before you ship them.

Your first test is free: sign in with Google and it starts right away. Last checked 2026-10-02.

25 simulated people read it the way they would really meet it. Takes about 90 seconds.