Ranked in these QuestionsQuestion Ranking
Pro 100% free (at the moment)
The company earns (enough) money with affiliate links, therefore there is no need for a purchasable pro membership.
Pro Auto tagging
It makes tag suggestions based on your tags already used
Pro Follows strict privacy rules
Because it is located in Germany, the company has to follow very strict rules regarding privacy.
Pro Automate tasks with Zapier
Automating tasks with Zapier.
Programatically access links and tags.
Pro Clean, efficient UI
It saves the date when the bookmark is added
Con Uses affiliate links, which can be seen as an invasion of privacy
Affiliate links are usually not only a way to earn money with advertisement. They also include generating user profiles, which could be seen as a big privacy issue.