Microsoft Exchange Online.

Facts

Headquarters

US (US)

Category

Collaboration

Type

Product

GDPR-compliant

No

Open-source

No

Data hosting

US, EU

EU alternatives

• grommunio

  Austrian open-source groupware and office suite as a Microsoft Exchange and Office alternative

  AT · open-source

  ↗
• Infomaniak

  Swiss hosting provider with own kSuite (email, drive, video)

  CH · commercial

  ↗
• Kolab

  Swiss open-source groupware platform with email, calendar and file management

  CH · open-source

  ↗
• Kopano

  Dutch groupware with self-host options

  NL · open-source

  ↗
• Nextcloud

  Open-source self-hosted collaboration platform for file sync, chat, and office

  DE · open-source

  ↗
• ONLYOFFICE

  European office collaboration suite with self-hosting option

  LV · open-source

  ↗
• Open-Xchange

  European open-source email, calendar, and productivity suite

  DE · open-source

  ↗
• Proton

  Swiss encrypted email, calendar, drive and VPN suite

  CH · commercial

  ↗

Also in this category

• BigBlueButton (self-host)EU
• CryptPadFR
• Nextcloud DeckDE
• Element (Matrix)GB
• FlockNL
• FluffyChatDE