Is Contact Book subject to the CLOUD Act?

No. The CLOUD Act compels US-based companies (or US subsidiaries) to hand over data they control, regardless of where it physically lives. Contact Book has no US entity, no US contracts, and no US-controlled infrastructure in the data plane. Stripe processes payment data and is US-headquartered, but that boundary is well-defined: payment metadata only, never your records.

Where exactly is my data stored?

On dedicated servers we operate ourselves, physically located in Germany. The audit log, attachments, embeddings - everything in the data plane - lives there. Backups stay within the same EU jurisdiction in different physical locations and roll off on a 30-day window. We deliberately do not name the exact data centre - knowing the rack does not buy the customer anything and would make operator changes a public event.

Do you log IPs or session metadata to a US service?

No third-party analytics, no Google Analytics, no Meta pixel, no third-country tag manager. The first-party device + session ledger lives in our own Postgres + Redis - same EU boundary as the rest of the data plane. Logs are operational only and rotate at 30 days.

What happens if I'm a customer outside the EU?

You can use Contact Book from anywhere. The data still lives in the EU; the request travels from your location to our servers and back. That's a posture choice on our side, not a geo-restriction on yours.

Contact Book

Compare

Contact Book: the EU alternative to UpHabit

Same job, hosted in the EU. Contact Book runs in Germany under German law - your data stays in EU jurisdiction end to end.

EU alternative

Personal CRM

Keep in touch

Comparison

Julia YukovichCo-Founder + CEO

·January 9, 2026·

3 min read

If your reason for moving off UpHabit is data sovereignty, the comparison gets simpler. Contact Book is hosted in Germany on infrastructure we operate ourselves - no US-headquartered company in the request path. The CLOUD Act does not reach what physically lives here.

At a glance

UpHabit's pitch is import everything and let reminders do the rest: it syncs your phone contacts, lets you tag and group them, and nudges you on a schedule. Contact Book takes the opposite starting point - a smaller circle you add on purpose, with a sentence of context per person, hosted in Germany with no trackers. Pick UpHabit if you want your whole address book pulled in and reminded against; pick us if you'd rather keep a thin, curated, private log of the relationships that genuinely matter.

EU jurisdiction

What 'EU-hosted' actually means here, end to end

Contact Book runs on dedicated machines we operate ourselves, physically located in Germany. There is no US-headquartered subprocessor in the request path - the data plane (your records, your files, your audit log) lives entirely in EU jurisdiction. Two third parties exist outside that boundary: Stripe (payment information only, under the EU-US Data Privacy Framework) and the mail relay for transactional email. Neither sees your records. UpHabit's setup is the variable - if their primary infra is US-based, the CLOUD Act applies regardless of what their privacy page claims.

Contact Book vs UpHabit: EU comparison

	Ours Contact Book	Theirs UpHabit
Hosted in Germany
Auto-import phone contacts	Manual / file import
Per-person cadence reminders
Conversation log
Life events + gifts		Limited
Family / relationship graph
Curated-circle by default		Whole address book
No third-party trackers		Unclear
Free tier

When to pick which

Pick Contact Book when

You'd rather curate a small circle than have your whole address book imported.

You want context per person - the log, the life events, the family graph - not just reminders.

Hosting in Germany and a no-tracking posture matter to you.

Pick UpHabit when

You want your entire phone address book pulled in and reminded against in one move.

Reminders are the whole job for you and you don't need a deep per-person record.

EU-jurisdiction questions

Specific to where the data lives, who can subpoena it, and what crosses borders.

Start with Contact Book

Free plan, no credit card. We host in Germany. Export + delete are self-serve.

Written by

Julia Yukovich

Co-Founder + CEO

Julia is one of the Co-Founders. She handles design, product direction, and most of the support replies that arrive in the morning.

julia.yukovich at aicuflow dot comLinkedIn