Ask HN: What apps suite do you use for you company IT infra?

Looking for secure+free or oss/self-hostable back-office apps to cover for a new software service company I just registered to provide consultancy services and build SaaS/Apps:

  * document editing (onlyoffice?)
  * crm
  * email with custom domain support 
  * website/blogging (currently thinking of notion.so)
  * digital asset management
  * and others?