Seems not an easy task at all ...

Thanks. As you wrote this website has the same problem than Coinpaprika: In the category
some premined coins are listed, but not all. For example, Ethereum is missing which had a big premine. There is also Dash listed which had no premine in the genesis block but an insta-mine which is in my opinion a different category ...
What I also want to do is in reality to filter them out - i.e. to get all coins which were
not premined. Maybe your idea to use both sources together isn't that bad. Another one is to simply create a custom watchlist with Coinmarketcap or another website.
I have also sent a
feature request to Coingecko but got no response so far, maybe I should do it via another means than the forum.
here is list sorted by rank- coinmarketcap.com
- coingecko.com
- coinranking.com
- coincodex.com
- digitalcoinprice.com
- coincost.net
- crypto-rating.com
- coinlore.com
Thanks designbuyers for the list, although from CMC and Coingecko I already knew the feature wasn't present. I checked the rest of the sites and unfortunately most do not even offer filters - only Coinlore has a premine filter but see above.[/list]