Head-to-head · Collaboration
Slack vs Stackfield
Which one to pick in 2026 — comparing 🇺🇸 Slack with the European alternative 🇪🇺 Stackfield on the things that actually decide who can read your data.
🇺🇸 Slackvs🇪🇺 Stackfield
Verdict
Who has stronger privacy guarantees by law?
Stackfield — GDPR-native and outside the US CLOUD Act / FISA 702 reach.
Which one encrypts your data end-to-end by default?
Stackfield ships E2E encryption by default. Slack does not.
Which one tracks you for ads?
Neither monetises through ad tracking.
Which one is open source?
Stackfield is not fully open source — check details.
Side-by-side
Slack vs Stackfield — full comparison
Criteria
🇪🇺 Stackfield
🇺🇸 Slack
Headquarters
Munich
San Francisco, USA
Jurisdiction
DE
USA
Data location
DE
US (EU residency paid tier)
GDPR-native
Yes
No
CLOUD Act / FISA exposed
No
Yes
Ad tracking
No
No
End-to-end encryption
Yes
No
Open source
No
No
Ownership
Stackfield GmbH
Salesforce
Founded
2012
2013
Make the switch
Try Stackfield instead of Slack
Colaboração com E2E encryption
Other European alternatives to Slack