# 1–100 testing | GTM and Outreach

Source: https://exntra.in/help/ab-testing

[Help center](/help)

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-   [Sending limits and the slow start](/help/slow-start)
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-   [Pause, edit and restart a campaign](/help/manage-campaign)
-   [1–100 testing](/help/ab-testing)

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-   [The Master Inbox](/help/master-inbox)
-   [Automatic replies](/help/auto-replies)

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# 1–100 testing

Write up to 100 versions of an email, see which gets the most replies, and send the winner to everyone.

[Open in the app →](https://app.example.com/#/campaigns/new)

A 1–100 test sends different versions of the same email to different leads. Then you see which version gets the most replies. You can write from 2 up to 100 versions of each email.

## Add versions

1.  Open the campaign’s **Content** step.
2.  Open an email and click **1–100 test: add a version**.
3.  Write version 2. Change the subject, the email, or both.
4.  Keep adding versions, up to 100. With more than 10, pick a version from the list to edit it.

Leads are split evenly between the versions, at random. Each lead always gets the same version.

## Test one thing at a time

Change only the subject, or only the opening line. Then you know what made the difference.

## How many versions?

Every version needs enough emails before its result means anything. A good rule: at least 50 emails per version, better 100.

-   1,000 leads: up to about 10 versions.
-   10,000 leads: you can test many more.

With fewer leads, test fewer versions.

## Pick the winner automatically

Tick **Pick the winner automatically after** and choose how many emails per version, for example 100.

When every version has sent that many, we wait **3 days** so replies can arrive. Then the version with the **best reply rate** wins. Clicks, then opens, break a tie. Every lead not emailed yet gets the winner.

## See the results

Open the campaign. The **1–100 test** card shows every version: sent, opened, clicked and replied. The version with the most replies is marked **leading**. With many versions, the best ones are shown first.

Click **Pick as winner** to choose one yourself at any time. Click **Keep testing** to undo it.

## Replies, not opens

Opens are unreliable: Apple Mail and security scanners open emails nobody reads. So replies decide the winner.

## Preview and test

In **Preview and send a test**, choose a version to see it, and send yourself a test of that version.

[Previous**Pause, edit and restart a campaign**](/help/manage-campaign) [Next**The Master Inbox**](/help/master-inbox)

**Still stuck?** Use the chat button inside the app, or email us at [support@example.com](mailto:support@example.com).