Data residency and why your EU launch slipped
Where data physically sits, who can access it, and the questions to ask a model vendor first.
Residency is where data is stored and processed. Sovereignty is which jurisdiction's authorities can compel access to it. They are different, and an EU region alone does not settle the second one.
Model vendors complicate it because inference regions, abuse-monitoring log regions and support access can each live somewhere different. Ask about all three, in writing, before you commit a launch date.
Transfers out of the EEA need a lawful mechanism and, in practice, a transfer impact assessment. That work takes weeks of someone else's calendar time — which is why launches slip on paperwork rather than on code.
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