Lightweight A/B & split testing software

Start experimenting within minutes. Better conversion rates are just a few clicks away.

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Getting started

Start testing website copy or designs in less than 5 minutes.

1. Provide a URL

For A/B tests, submit the URL of a page with your target text element. Cline fetches the text from there. For split tests, just provide a base page URL.

2. Create experiment

For A/B tests, choose one text element to test per experiment. For multiple elements on the same page, create additional experiments. This step is not required for split tests.

3. Install tracking script

Place the Cline script between the <head> and </head> tags on your site. This enables Cline to present various variants to visitors. Or, easily link a Webflow site with a few clicks.

4. Add variants

For A/B tests, use generative AI to quickly create five text variants. Edit them manually if needed. For split tests, manually generate page URL variants.

5. Start experiment

Set a conversion goal before starting your experiment to track success directly from the experiment page. Once you've created more than one variant, Cline will begin serving them to your visitors, allowing you to monitor and analyze how each variant influences the achievement of your conversion goal.


Connecting to your favorite tool is easy. More integrations on the way.

  • webflow


    Build with the power of code — without writing any

  • framer


    Supercharge your business site

  • wordpress


    The worlds most popular CMS

  • shopify


    Headless, composable storefronts

Why Cline?

Most A/B testing tools today are overly complex. Cline offers a user-friendly experience without the need for training or any prior experience. Empower your marketing team to iterate and optimize with ease and efficiency.

  • Tailored recommendations

    Say goodbye to generic suggestions. Cline analyzes your site's unique context, offering tailored copy variants primed for optimal engagement and conversion.

  • Quick and easy to integrate

    Paste a couple lines of code into your website's HTML, and Cline seamlessly integrates, ready to supercharge your copy.

  • Lightweight script

    Our under-8KB tracking script ensures top-notch site performance, setting us apart from slower A/B testing tools. Keep your website lightning-fast.

  • Privacy-friendly

    We do not store any personal data. We only store the data that is necessary to run the experiments.

  • No-code integrations

    We are focused on making Cline the best-in-class no-code A/B testing tool. We will be adding more integrations soon.

  • A/B testing on easy mode

    Designed for marketers, not engineers. No need to write code or learn a new tool.