Moodle

Pros: There are nice to have features of Workplace, mostly they can all be replicated on the open source version with the exception of the multi-tenancy and dynamic rules features.

Cons: Coming from an out-of-date Moodle version with a high degree of customizations, Moodle Workplace partner was not able to handle our load sufficiently and ran into a myriad of issues. We never even got out of onboarding phase to go to a live production site.

Overall: RECOMMENDATION - DO NOT GO TO WORKPLACE IF YOU ARE LOOKING TO MIGRATE A HIGHLY CUSTOMIZED OR OLDER SITE. Workplace features nice to have if your are at a place where you can start a site from scratch.

Pros: It is open-source and free; any educational institute can make use of its services. The integration of plugins makes the software highly customizable. It has many assessment formats and can add multiple courses to assess students across different domains.

Cons: Not the best interface. It also has a steep learning curve, especially if you want to customize it to suit your needs. Lack of video conferencing facilities is a disappointment.

Overall: Moodle is a good tool that offers what is worth its price. Students and educators can use it to collaborate and update each other about their learning progress.

Pros: Moodle helps in managing and developing courses online. System based on plugins. Built whatever we want. Workshop plugin manages a peer assessment processes. Some of its main features are learning objectives, enhanced completion tracking, powerful analytics. Group activities are also available. Rich features software.

Cons: Full of engaging material and activities. Good software. Easy to use.

Overall: Build amazing education environment. Provides open source learning platform. Integrates easily with Google apps, next cloud, Microsoft office 365 and many more. Modern interface. Easily customisable. Help in editing text. Customer friendly app. It can be used on mobiles laptops and tablets.

Pros: It's built on top of Moodle LMS by the same business that makes Moodle LMS.
The new Theme and Course Format.
Multi-tenancy, Organisation Structure, Programs and Certifications, Report Builder, Dynamic Rules

Cons: It is not as customisable as the Moodle standard LMS.

Overall: It's a very good product for Corporate Learning, Compliance, and any other cases where you need to certificate and re-certificate users based on programs of courses and keep track of everything related to these processes.

Pros: Open-source software - free of cost.
Easy to deploy, fully customizable.
User-friendly.
One of the best content management system available.

Cons: Requires high configuration servers for a large number of users.

Overall: It's a very good content management system. I've used this software while in my bachelor's for accessing online tests as well as materials.
It has been a very experience.