A private, self-hosted tool that keeps an Owner's own Google Contacts, Calendar, and Tasks mirrored to their personal information management (PIM) server.

What it is

PIM Sync is a self-hosted synchronization tool with two roles. The Operator (Privacy Playbook LLC) provides the software; an Owner runs their own instance, connects their own Google account, and keeps their Google Contacts, Calendar, and Tasks in sync with a self-hosted PIM system — an LDAP contact directory and a Radicale CalDAV/CalDAV-tasks server.

It is a self-hosted tool, not a hosted public service: the Operator supplies only the software and never has access to an Owner's data, which stays entirely on the Owner's own servers. There is no shared service and no third-party access to anyone's data. (Today it is run by its developer for personal use.)

How PIM Sync uses Google data

PIM Sync requests only the scopes it needs to mirror the three data types it manages, plus a read-only identity check. In every case the data is the Owner's own:

• Contacts (.../auth/contacts) — reads the Owner's Google Contacts to copy them into their self-hosted directory, and writes their edits back so both sides stay consistent.
• Calendar (.../auth/calendar) — reads the Owner's Google Calendar events to mirror them into their self-hosted CalDAV server, and writes their changes back.
• Tasks (.../auth/tasks) — reads the Owner's Google Tasks to mirror them into their self-hosted task store, and writes their changes back.
• Email & basic profile (.../auth/userinfo.email, .../auth/userinfo.profile) — read only, used once per sync to confirm the connected account is the Owner's. This is a safety check; it is not stored or shared.
• Sign-in (openid) — the standard OpenID Connect sign-in scope, requested automatically with the profile scope; the resulting ID token is not otherwise used.

Where the data goes

An Owner's data is synchronized only between Google and servers the Owner controls. It is never sold, never shared with third parties, never used for advertising, and never used to train machine-learning models — and the Operator never has access to it. See the PIM Sync Privacy Policy for full detail, including the role definitions and the Google API Limited Use commitment.

PIM Sync is provided by Privacy Playbook LLC (the Operator). Questions: pim-sync@privacyplaybook.com.