in the past I came accross Zoho WIKI but did not like the platform because it could use a lot of upgrade. Over the time I have noticed Zoho People come out with a LMS module which allows us to created a shared knowledge for our internal team

I also came across Zoho Connect which as a knowledge-based for internal team referred to as Manual

Now I am seeing Zoho Learn which is a new and fine-tuned version of Zoho Wiki.

All of these platforms are very similar but I am wondering what are the differences and how they would now know what to use?

Could these all not be synced?

What is included in the Zoho One Subscrition ? 

Please help me make a clearer decision on the platforms.