Slack.

Facts

Headquarters

US (US)

Category

Collaboration

Type

Product

GDPR-compliant

Yes

Open-source

No

Data hosting

US

EU alternatives

• Teamwire

  German enterprise messaging with GDPR compliance and MDM

  DE · commercial

  ↗
• Stackfield

  German project management and team communication with encryption

  DE · commercial

  ↗
• Wire

  End-to-end encrypted collaboration platform by Wire Swiss GmbH (Zug, Switzerland)

  CH · open-source

  ↗
• Element (Matrix)

  Decentralised messaging based on the open Matrix protocol

  GB · open-source

  ↗
• Mattermost

  Open-source messaging platform for developer and DevOps teams

  US · open-source

  ↗
• Matrix / Synapse

  Matrix homeserver; self-hostable.

  GB · open-source

  ↗
• BigBlueButton (self-host)

  Virtual classroom and video conferencing; self-hostable

  EU · open-source

  ↗
• CryptPad

  End-to-end encrypted collaboration (FR/EU).

  FR · open-source

  ↗

Also in this category

• Nextcloud DeckDE
• FlockNL
• FluffyChatDE
• Google MeetUS
• Google WorkspaceUS
• HedgeDocDE