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Is Quad9 EU-sovereign?

No. Quad9 is operated from Switzerland, outside the EU, so staysin.eu classifies it as non-EU.

Non-EU Switzerland Classified 2026-10-21

Curator's note

Non-profit foundation based in Zurich, Switzerland.

How staysin.eu classifies Quad9

A provider counts as EU only when all three criteria hold:

  1. Country: the operating company is based in the EU. Quad9 is operated from Switzerland (outside the EU).
  2. Holding: no non-EU parent or holding company.
  3. Own infrastructure: it runs its own stack rather than reselling a non-EU service.

Where a server physically sits is shown on each check but does not change the verdict: legal reach follows who controls the processing, not where the bytes are. Read the methodology.

How often staysin.eu sees Quad9

Seen on 3 of 10871 checked domains (latest check per domain, as of 25 October 2026): as mail (MX) on 3, as third-party requests on 2.

Domains are those people chose to check on staysin.eu, not a representative sample of the web.

Recently checked domains using Quad9:

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