Okay, this is the continuation of the Top 50 Learning Systems for 2020. Below are the Top 20 Learning Systems (of those Top 50).
Before I forget, many readers have inquired about why is Moodle not on my list. Moodle base is open source, and thus from Moodle alone standpoint is not on the list, nor is any open source solution.
That said, eThink Education is my #1 Moodle Partner for 2020, they will heavily customize Moodle for you, especially Moodle Workplace; I also rank them #1 for Totara Partners. You can also find them on FindAnLMS too.
Tier3 NexGen is often noted in these rankings. For those who are unaware of what is Tier3 aka as my T3 Grid, here is the link for details, etc.
Now onto the rankings.