At its base, geizhals is a database where much effort went into data quality. Chestr seems(to me) to be another social media site but focused on shopping.

Simple comparison (from the demo video): GH/Chestr Comparing prices:yes/no Filtering/sorting for a multitude of attributes:yes/no Social component:no(at most a rating/review)/yes Needs an account:no/yes Focusing on information over feelings:yes/no manually maintained entries:yes(at least I assume so, no one comes close)/no Getting a handle on everything that exists for a type of product:yes/no Inclusion of past prices:yes/no

To me, chestr is basically worthless. I don't care what others bought when I'm searching for something. What fits for them doesn't have to fit for me. I'm not starting from a specific shopping site but from the products itself, and then search for the perfect (price, reviews) shopping site.

For that matter, this seems like a great site for influencers and their audience. I very much doubt that the data quality required for building something like geizhals can be achieved in a "hack it together" startup context.