WikiSuite vs Microsoft

WikiSuite can be seen as a FLOSS self-hosted alternative to Office 365 and most Microsoft software to manage your data.

Microsoft WikiSuite
Windows Server ClearOS it’s regarded as one of the best open source alternatives for Windows Server it is a Server & Networking, with a lot of features like Mail and Messaging(IMAP, POP), Content Filtering,Intrusion Protection,Antimalware and Antispam,File and Print Services. Current focus is to add JMAP support.
Active Directory OpenLDAP in ClearOS
Skype & Lync Server-side: Openfire + Converse (XMPP) with Jitsi Meet (WebRTC) =>Desktop client: Pàdé, a Chrome extension with tons of features. See Pàdé Presentation => phone system: FreeSWITCH & FusionPBX
Exchange Kolab / Roundcube Advanced Mail / Calendar / Contacts (although not tightly integrated with the rest of WikiSuite)
OneDrive Tiki File Gallery - Data stored on ClearOS Flexshare and Syncthing for automated sync
Project Tiki Trackers & other features in Tiki can be configured to be a project management tool for a typical organization (most people use a spreadsheet for project management anyways)
Visio Tiki (MxGraph / draw.io) PluginDiagram
SharePoint Forms: Tiki Trackers, Files: Tiki File Gallery
SQL Server For end user databases: Trackers. For a more traditional relational database, use the same as Tiki: MySQL or MariaDB
Office Tiki-Wiki-CMS-Groupware for most data management as it is the Free/Libre/Open Source Web Application with the most built-in features
=> Word Tiki Wiki with or without WYSIWYG
=> Excel Tiki Spreadsheet
=> PowerPoint Tiki Slideshow
=> Access Trackers
=> Outlook Kolab / Roundcube Advanced Mail / Calendar / Contacts (although not tightly integrated with the rest of WikiSuite)
=> OneNote Tiki Notepad or Kolab notes
=> Publisher Tiki has basic Print and ideas to improve to become an Online Publishing House
Visual Studio For End user programming, use the existing feature set in Tiki. Especially Trackers. JavaScript, jQuery and many other Wiki Plugins can be used. For more advanced use cases, you can use Tiki as Framework or even direct PHP & JavaScript.
Bing We won't do search of public data, but for all your internal data: Elasticsearch, including Search within files and increasingly some Natural Language Processing (NLP) features.
Dynamics Tiki Trackers can be configured as a CRM. But even better would be to integrate with Kolab to have better integration in mail system
Yammer Tiki can be configured to make your own Social Networking site.
Windows Lubuntu
System Center not yet, but it's on the radar
Azure not yet, but it's on the radar