"The chart lists MSN Messenger for Microsoft's Messaging. This is very recent."
It seems to have been copied out of a 2018 paper extracted from a 2017 paper by someone else. There seems to have been considerable shrinkage from the 2017 paper both in categories (28) and content (Microsoft Team [sic] in this particular case).
It's difficult to decide what the table is supposed to show. Where, for instance are Streetview.co.uk OpenStreetMap, Firefox and derivatives, Opera in just a couple of categories? It seems to be a handy list of a few things for people who don't want to look far (AKA people who want to get locked in)