Comparison
Calliente vs sync.blue
sync.blue is a broad contact-synchronization hub that connects 80+ systems (CRMs, phone systems, Microsoft 365) and keeps them in sync. Calliente is focused specifically on getting your Entra ID / Microsoft 365 directory into the native mobile address book, with delegated Graph calls and no server-side storage of contacts.
Feature comparison
| Feature | Calliente | sync.blue |
|---|---|---|
| Focus | Entra ID → native mobile contacts | 80+ system contact sync hub (CRM, telecom, M365) |
| Sync mechanism | Delegated Microsoft Graph from the device | Server-side sync engine |
| Server-side contact storage | None | Yes (ISO 27001 data centers in Germany) |
| Mobile native contacts | iOS, Android (incl. Work Profile) | iOS, Android |
| Deployment | Intune, Workspace ONE | Intune, Jamf, MobileIron |
| Data residency | No contact storage (on-device Graph) | Germany |
| Export protection | Secure Call ID (blocks export & iCloud backup on iOS) | Not a primary feature |
The key difference
sync.blue is a powerful multi-source consolidation platform that stores and reconciles contacts server-side (hosted in Germany). Calliente does one job — Entra ID to native mobile contacts — with delegated Graph calls and no server-side contact storage, plus mobile-specific protection (Secure Call ID).
Calliente
Microsoft 365-centric organizations that want native mobile directory sync with no server-side storage and export protection on iOS.
sync.blue
Organizations that need to consolidate contacts across many systems (CRM, telecom, multiple directories) into a central, server-managed address book with German data residency.
Calliente vs sync.blue FAQ
Is Calliente a sync.blue alternative?+
For the specific use case of pushing Microsoft 365 / Entra ID contacts to mobile devices, yes. Calliente is narrower and on-device (no server-side storage), while sync.blue is a broad multi-source sync hub with server-side storage.
Where is contact data stored?+
sync.blue stores contacts in ISO 27001-certified data centers in Germany. Calliente stores no contacts at all — it makes delegated Microsoft Graph calls directly from the managed device.
Which should I choose for a Microsoft 365 mobile rollout?+
If your need is simply Entra ID contacts on every phone with Intune/Workspace ONE and no server-side storage, Calliente is the more focused fit. If you must merge many non-Microsoft sources, sync.blue covers more ground.
Comparison based on publicly available information about sync.blue at the time of writing. Vendor features and pricing may change — verify on the vendor's site.