IM (Instant messaging)

In-house IM tool Mattermost. Alternative Matrix + Synapse (server) + Element (client). Public, or partly public open source related messaging with Slack. Jitsi as a video conference tool.

Matrix

Is IM protocol.

Element

Is Matrix client, who can be used for IM and video conference.

Synapse

Is Matrix protocol server, which can be used for IM and video conference.

• https://element.io/en
• https://matrix.org/