Blog
Notes from the Crowdbook team
Product updates, and how we think about privacy, cryptography, and keeping contacts in sync.
product privacy
Introducing Crowdbook: shared contacts without the surveillance
Why we built a crowd-sourced address book that keeps your group current while the server never sees a thing it can read.
Read post security explainer
What "zero-knowledge" really means (and what it doesn't)
Encrypted in transit, encrypted at rest, end-to-end, zero-knowledge — the terms get blurred. Here's how we use them.
Read post use-cases
Keeping a club roster current without a spreadsheet
A short look at how a real group — a youth sports club — could use Crowdbook day to day.
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