# Cookie banner speed: Consentl, CookieYes and Cookiebot on a phone

> Data, requests and processor time that Consentl, CookieYes and Cookiebot add to real websites on a phone, measured with Google PageSpeed Insights.

Source: https://consentl.com/speed

# Cookie banner speed on a phone

A cookie banner loads on every page, so its weight matters. We measured what Consentl, CookieYes and Cookiebot add to real websites on a phone, with Google's own tool, and we show the method so that anyone can check it.

## Results

Median per banner, Google PageSpeed Insights, mobile, measured on October 27, 2026
| Banner | Data downloaded | Requests | Processor time |
| --- | --- | --- | --- |
| Consentl | 19 KB | 3 | under 50 ms |
| CookieYes | 33 KB | 10 | 91 ms |
| Cookiebot | 157 KB | 5 | 425 ms |

Lower is better in every column. Only the banner vendor's own files count, not the rest of the website.

## Measured websites

Each value is the median of the runs on that website. The links open the website in PageSpeed Insights.

| Website | Banner | Data downloaded | Requests | Processor time |
| --- | --- | --- | --- | --- |
| [consentl.com](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fconsentl.com%2F&form_factor=mobile) | Consentl | 18 KB | 3 | under 50 ms |
| [consentl.com/pricing](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fconsentl.com%2Fpricing&form_factor=mobile) | Consentl | 19 KB | 3 | under 50 ms |
| [best4u.nl](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fwww.best4u.nl%2F&form_factor=mobile) | CookieYes | 32 KB | 9 | 149 ms |
| [latevaweb.com](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fwww.latevaweb.com%2F&form_factor=mobile) | CookieYes | 83 KB | 11 | 91 ms |
| [codems.com](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fwww.codems.com%2F&form_factor=mobile) | CookieYes | 33 KB | 10 | 67 ms |
| [acm.org](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fwww.acm.org%2F&form_factor=mobile) | Cookiebot | 158 KB | 5 | 641 ms |
| [kartenwelt.rewe.de](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fkartenwelt.rewe.de%2F&form_factor=mobile) | Cookiebot | 157 KB | 5 | 294 ms |
| [generaxion.com](https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fgeneraxion.com%2F&form_factor=mobile) | Cookiebot | 145 KB | 5 | 425 ms |

## How we measured

-   Google PageSpeed Insights (Lighthouse 13.5.0) in mobile mode: an emulated mid-range phone on a slow 4G connection with a slowed-down processor. Each website was measured 3 times.
-   We count only the requests to the banner vendor's own servers (script, settings, texts, consent logging) and add up the data they transfer.
-   Processor time is the main-thread time of the vendor's scripts as reported by Lighthouse, which lists a script only from 50 ms on; a smaller cost is shown as "under 50 ms".
-   Consentl is measured on consentl.com, which uses the same banner as our customers; only the banner's requests count, not the website itself.
-   CookieYes and Cookiebot are measured on websites of their customers that load their banner, not on their own websites, where every file comes from the vendor's servers.
-   We do not compare the page load times of the measured websites: they depend mostly on the rest of each website, not on the banner.

## Check it yourself

Results vary a little from run to run and change with each vendor's updates. Open any website from the table in Google's free tool and look at the requests to the banner's servers: [PageSpeed Insights](https://pagespeed.web.dev/)

CookieYes and Cookiebot are trademarks of their respective owners. Consentl is not affiliated with them; we name them only to compare measured facts.