Head-to-head · Forms & Surveys
Auth0 vs Arengu
Which one to pick in 2026 — comparing 🇺🇸 Auth0 with the European alternative 🇪🇺 Arengu on the things that actually decide who can read your data.
🇺🇸 Auth0vs🇪🇺 Arengu
Verdict
Who has stronger privacy guarantees by law?
Arengu — GDPR-native and outside the US CLOUD Act / FISA 702 reach.
Which one encrypts your data end-to-end by default?
Neither ships full E2E by default — check the table for nuance.
Which one tracks you for ads?
Auth0 relies on ad tracking. Arengu doesn't.
Which one is open source?
Arengu is not fully open source — check details.
Side-by-side
Auth0 vs Arengu — full comparison
Criteria
🇪🇺 Arengu
🇺🇸 Auth0
Headquarters
Madrid, Spain
United States
Jurisdiction
Spain
United States (US CLOUD Act)
Data location
EU
United States
GDPR-native
Yes
No
CLOUD Act / FISA exposed
No
Yes
Ad tracking
No
Yes
End-to-end encryption
No
No
Open source
No
No
Ownership
Private
US Corporation
Founded
2018
0
Make the switch
Try Arengu instead of Auth0
Build custom login and signup flows with powerful forms and logic.
Other European alternatives to Auth0