Compare
Plain-language privacy notice, standard German GDPR DPA available on request, self-serve export + delete.

GDPR isn't a checkbox - it's a posture. If you're moving off Hippo because their AVV / DPA is opaque, Contact Book is what a clean alternative looks like: subprocessor list of two (Stripe + mail relay), self-serve export + delete from account settings, and a standard German GDPR DPA on request when your procurement team needs one.
Hippo's design philosophy is the opposite of feature-creep: do the keep-in-touch reminder loop perfectly and stop. Contact Book does the same loop alongside life events, gifts, family graph, and a journal. Pick Hippo if you want the simplest possible nudge tool; pick us if you want the texture too.
GDPR posture
Three things matter under GDPR for a tool like this: (1) lawful basis for processing, (2) data subject rights (export, delete, port), and (3) the auftragsverarbeitungsvertrag / DPA chain. Contact Book treats them as engineering invariants, not legal optics. Lawful basis is the contract you sign with us. Subject rights are self-serve from your account settings - no support ticket required. The subprocessor list has two entries (Stripe + mail relay). A standard German GDPR DPA is available on request from /sales whenever your procurement team needs one - we don't charge for it and don't gate it behind a plan tier. Where Hippo sits on each of these is the rest of this page.
GDPR questions
Free plan, no credit card. We host in Germany. Export + delete are self-serve.

Written by
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.
Read next
Full Contact Book vs Hippo
Smaller scope vs broader scope on the same problem.
Read
Contact Book vs Dex: keep-in-touch reminders, two takes
Both nudge you to follow up. The difference is what happens after the nudge.
Read
Best personal CRM for relationship-builders
For people whose calendar is mostly other people - networkers, hosts, founders, mentors.
Read
The strength of weak ties: the network that quietly carries you
Why your weak ties matter more than your inner circle - and how to keep them alive without faking it.
Read
| Ours Contact Book | Theirs Hippo | |
|---|---|---|
Stay-in-touch reminders | ||
Life events + gifts | ||
Family / relationship graph | ||
Journal | ||
Hosted in Germany | ||
Free tier |