CellTrust SL2 for Microsoft vs Secure Contacts
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CellTrust SL2 for Microsoft
This app provides a secure mobility solution for businesses, integrating with Microsoft Intune to manage devices and mobile communications. It ensures regulatory compliance, captures business communications for archiving, and offers secure messaging and voice features.
- Device and application management
- Secure mobile communication
- Regulatory compliance
- Automatic communication archiving
- Secure mobile voice and messaging
- Integration with Microsoft 365
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CellTrust SL2™ and Microsoft Intune deliver a complete mobility solution for enterprises to take control of their devices, applications and mobile communication. Residing inside the Microsoft Intune container, which provides advanced controls for organizations to monitor and manage BYOD and COPE deployments, SL2 helps ensure that your organization’s mobile communications meet the highest standards of security and regulatory compliance. Fully archive agnostic, SL2 automatically captures business communications and routes them to your preferred archiving provider—supporting compliance without disrupting workflows. SL2 features secure mobile voice (optional) and messaging via a dedicated US phone number (Mobile Business Number - MBN) with Single Sign On, and integration with Microsoft 365 Exchange contacts. SIM card or VOIP voice options and features like Group Conversation enabling participants to converse and collaborate are also available. CellTrust container services are included. SL2 integrated with Microsoft Intune enables a rich set of mobile application protection policies to safeguard client data within the trusted Azure Cloud, helping to protect enterprises against cyber attacks. Integrating with Microsoft Intune enhances security and manageability features within the productive and trusted Azure cloud platform with increased endpoint security, Enterprise App Management and Endpoint Privilege Management. Any names or other personal data displayed are fictional and not based on real individuals. For use under patents: https://www.celltrust.com/SL2patents.
Secure Contacts
Manage business contacts centrally and compliantly without manual maintenance. Consolidate contacts from Outlook, Teams, and CRM systems in a secure environment, avoiding unwanted synchronization with third-party providers.
- GDPR-compliant contact storage
- Microsoft 365 integration
- Teams calls and chats
- Caller identification and blocking
- Duplicate detection and merging
- Secure contact sharing
- Vacation mode
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SECURE CONTACTS – GDPR-COMPLIANT CONTACT MANAGEMENT FOR BUSINESSES All your business contacts in one app - secure, efficient, and user-friendly. With Secure Contacts, you manage your business contacts centrally and in compliance with data protection regulations – completely without manual maintenance. The app consolidates contacts from Outlook, Microsoft Teams, your CRM system, and the company address book in a secure environment, without unwanted synchronization with third-party providers like Apple, Google, or WhatsApp. YOUR BENEFITS AT A GLANCE: • GDPR-compliant storage of all contacts • Secure use of Siri, CarPlay, etc. • No unwanted synchronization with third-party platforms • Microsoft integration: Seamless connection to M365 • Microsoft Teams: Start calls and chats directly from the app, including Teams status display • Caller identification • Call blocking • Vacation mode • vCard & QR code • Duplicate detection & automatic contact merging • Create, edit, delete, and securely share contacts • Scan vCards to quickly add new contacts • BYOD & COPE-ready: Ideal for both personal and business devices • Data privacy: No data collection by the app • No additional infrastructure required TRY IT FREE FOR 30 DAYS Request your FREE TRIAL LICENSE with full functionality directly from us and experience the benefits for your daily work. Request trial license: https://secure-contacts.com/kontakt-testlizenz/ TECHNICAL REQUIREMENTS • Microsoft Entra ID (formerly Azure AD) for user management • Any MDM system (Intune preferred) to manage mobile devices GET IN TOUCH Want to protect your business contacts without disrupting your employees’ workflow? Let’s talk about your project! More information available at: https://secure-contacts.com/ Please note: The app uses Apple iOS CallKit Blocking & Identification to recognize incoming callers. Users can also activate the app’s vacation mode, which automatically adds all listed contacts (except favorites) to the call block list. When vacation mode is deactivated, the block list is cleared.
Screenshots
Verdict
The clearest difference is ratings volume: CellTrust SL2 for Microsoft at 4 against Secure Contacts's 1. On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for CellTrust SL2 for Microsoft against 5.0 for Secure Contacts. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
CellTrust SL2 for Microsoft ships an update every 3 months, Secure Contacts every 6 weeks. The most recent releases landed on September 26, 2026 and July 26, 2026 respectively.
| Parameter | CellTrust SL2 for Microsoft | Secure Contacts |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 146 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | CellTrust Corporation | Provectus Software GmbH |
Customer experience
CellTrust SL2 for Microsoft
Secure Contacts
In-app purchases
CellTrust SL2 for Microsoft
No in-app purchases
Secure Contacts
No in-app purchases
Questions
Is CellTrust SL2 for Microsoft free?
Is Secure Contacts free?
Which has better reviews, CellTrust SL2 for Microsoft or Secure Contacts?
Do CellTrust SL2 for Microsoft or Secure Contacts have ads?
Which is updated more often, CellTrust SL2 for Microsoft or Secure Contacts?
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