They use Plausible as their analytics provider https://plausible.io/
They use LaunchDarkly https://launchdarkly.com
A/B testing products are up to debate. It's to stage roll-outs of features. But it's also taking one group of people and showing them one thing while another group of people see another thing and see how each group reacts to the changes.
https://launchdarkly.com/case-studies/
Their image results are identical to qwant.com.
(post is archived)