Comparison
Calliente vs Contactzilla
Both Calliente and Contactzilla push Microsoft 365 / Entra ID directory contacts into the native address book on iOS and Android. The main difference is architectural: Calliente makes delegated Microsoft Graph calls from the device and keeps no copy of your contacts on its servers, while Contactzilla distributes contacts through a hosted CardDAV address book.
Feature comparison
| Feature | Calliente | Contactzilla |
|---|---|---|
| Primary source | Entra ID / Microsoft 365 directory | Microsoft 365 GAL, Google, Salesforce, CSV, vCard |
| Sync mechanism | Delegated Microsoft Graph from the device | Hosted CardDAV address book |
| Server-side contact storage | None | Yes (CardDAV server) |
| Deployment | Intune, Workspace ONE, Android Work Profile | MDM profile or QR code |
| Pricing model | Per user / year (€4–€6) | Per device / month (from $1.20) |
| Export protection | Secure Call ID (blocks export & iCloud backup on iOS) | Read-only address book locking |
| Free trial | 30 days | 14 days |
The key difference
Contactzilla relies on CardDAV, which means a server-side copy of your directory is hosted to be served to devices. Calliente performs delegated Graph API calls from the managed device, so company contacts are never stored or processed on Calliente servers — a GDPR-ready model that matters when your directory is sensitive.
Calliente
Microsoft 365-centric organizations that want no server-side storage of their directory, Intune/Workspace ONE rollout, and export protection (Secure Call ID).
Contactzilla
Teams that need to merge several sources (Google, Salesforce, CSV) into one shared address book and are comfortable with a hosted CardDAV model and per-device billing.
Calliente vs Contactzilla FAQ
Does Contactzilla store my company contacts?+
Contactzilla syncs via CardDAV, which requires a hosted copy of the directory to serve to devices. Calliente instead makes delegated Microsoft Graph calls from the device and stores no contacts on its servers.
Is Calliente a good Contactzilla alternative for Microsoft 365?+
Yes, if your directory is in Microsoft 365 / Entra ID and you want delegated, on-device sync with no server-side contact storage, Intune/Workspace ONE deployment and per-user annual pricing.
How does pricing compare?+
Contactzilla bills per device per month (from $1.20). Calliente bills per user per year (€4 Standard, €6 Business), which can be simpler to forecast for user-based licensing.
Comparison based on publicly available information about Contactzilla at the time of writing. Vendor features and pricing may change — verify on the vendor's site.