MatterMost
Mattermost is an open-source, self-hostable online chat service with file sharing, search, and integrations. It is designed as an internal chat for organisations and companies, and mostly markets itself as an open-source alternative to Slack and Microsoft Teams.
Get Elf Hosted MatterMost from $0.15/day 
How do I access MatterMost?
MatterMost will be available from your dashboard (https://<username>.elfhosted.com>), or directly, at https://<username>-mattermost.elfhosted.com
How do I get support for MatterMost?
- For general use of MatterMost, refer to the official site or to one of the links below.
- For specific support re your ElfHosted configuration / account, see the ElfHosted support options!