When comparing Readability vs Shaarli, the Slant community recommends Shaarli for most people. In the question“What are the best ways to organize bookmarks?” Shaarli is ranked 22nd while Readability is ranked 27th.
Ranked in these QuestionsQuestion Ranking
Pro Allows seeing what other people are reading
You can follow friend's feeds to find out what they are interested in.
Pro Fast performance
Pro Free forever
Since you host your own data, you can continue using Shaarli indefinitely with no possibility of the service becoming paid.
Pro You host your own data
Con Service is now defunct
This service was terminated on 30th September 2016.
Con No longer updated since 2013
Readability is no longer updated. The last update for this app is on January 7, 2013, which means no app redesigns, bug fixes or new features will be available.
Con Software update must be done manually
No auto-update built in.
Con You must host it yourself
If you do not already have a web server, this can cost you money to purchase.