Finding Companies that Use or Don't Use Klaviyo: A Search Guide

You can use Builtwith https://trends.builtwith.com/websitelist/Klaviyo There's an enrichment within Clay

niceeeeee

and how would check if the company is currently running paid ads as well(tiktok,facebook,google...)

I don't know how to do it through Clay, I'd love to see the support's answer. but if pixels are used, it's a good indicator they're at least considering running ads. If you want to go further, you could try SEMrush.

I guess i used the builtwith plugin for the pixel

Thanks Arturo O.