Compare
Cloze is a comprehensive AI-driven relationship platform. We're a focused personal CRM. Here's where each one is the right call.

Cloze ingests your email + calendar + social and uses AI to surface contacts you should reach out to. Contact Book is the opposite - it expects you to log meaningful interactions deliberately, and trades AI surfacing for a calmer, more private system. If you want a relationship intelligence engine that watches your inbox, Cloze is the obvious pick. If you want a personal CRM that does not read your email, that's exactly what we are.
Free plan, no credit card. We host in Germany. You can export and delete everything 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
Contact Book vs Monica (Personal CRM): the honest comparison
Monica is mature + open-source; we're newer + sharper. Both are honest options.
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
| Ours Contact Book | Theirs Cloze | |
|---|---|---|
Reads your email | ||
Reads your calendar | ||
Manual logging | ||
AI relationship scoring | ||
Conversation log | ||
Stay-in-touch cadence | ||
Hosted in Germany / EU | ||
Free tier | ||
Price | From €1/mo (free tier too) | $19.99-$29.99/mo |