Comparison

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.

Head to head
About

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.

Highlights
  • Device and application management
  • Secure mobile communication
  • Regulatory compliance
  • Automatic communication archiving
  • Secure mobile voice and messaging
  • Integration with Microsoft 365
Features
Read full description

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.

About

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.

Highlights
  • GDPR-compliant contact storage
  • Microsoft 365 integration
  • Teams calls and chats
  • Caller identification and blocking
  • Duplicate detection and merging
  • Secure contact sharing
  • Vacation mode
Features
Read full description

SECURE CONTACTS – SECURE AND CENTRALIZED CONTACT MANAGEMENT FOR ENTERPRISES All business contacts from Microsoft 365, Outlook, corporate directories, and leading CRM systems in one place. Business and personal contacts remain clearly separated at all times. Start your free 30-day trial today. Secure Contacts combines privacy, productivity, and communication in one centralized enterprise solution. Business contacts are always up to date and available on iPhone and iPad. WHY SECURE CONTACTS? Business contacts are often distributed across multiple systems. Employees need to search for contacts in Outlook, CRM systems, Microsoft Teams, or corporate directories. Incoming calls cannot always be identified, and business contacts frequently become mixed with personal contacts. Secure Contacts provides a centralized, secure, and scalable contact platform for organizations of any size. BENEFITS FOR ORGANIZATIONS • GDPR-compliant contact management • Protection against data leakage to third-party apps • Separation of personal and business contacts • Encrypted data storage • Integration with existing device management solutions • Secure onboarding and offboarding • Centralized management by corporate IT BENEFITS FOR EMPLOYEES • All business contacts in one place • Instantly identify incoming callers • Find colleagues and contacts faster • View availability and presence information • Start Teams calls, chats, and emails directly from a contact • Digital business cards always at hand • Apple CarPlay support FIND CONTACTS AND COMMUNICATE Secure Contacts consolidates contacts from Microsoft 365, Outlook, Microsoft Entra ID, corporate directories, and CRM systems including Salesforce, HubSpot, and Microsoft Dynamics 365. Phone calls, Microsoft Teams calls, chats, and emails can be initiated directly from a contact record. CREATE, EDIT, AND SHARE CONTACTS WITH EASE Contacts can be created manually or by scanning a digital business card. Personal contact information can be shared quickly and professionally using a digital business card. STAY PRODUCTIVE IN THE OFFICE AND ON THE GO Secure Contacts supports mobile and hybrid work on iPhone, iPad, and macOS. Contacts remain available even when offline. With Siri and Apple CarPlay support, business contacts remain accessible while traveling. Caller identification helps users instantly recognize incoming calls. SECURITY AND PRIVACY • GDPR-compliant contact management • Encrypted data storage • Protected corporate container • Microsoft Intune and enterprise MDM support • Face ID and Touch ID • Microsoft Single Sign-On (SSO) with corporate accounts • No uncontrolled transfer of contact data • Suitable for BYOD and COPE deployments THE PERFECT COMPLEMENT TO MDM AND MAM Secure Contacts extends existing MDM and MAM solutions by providing controlled access to business contacts on mobile devices. FAST DEPLOYMENT AND EASY ADMINISTRATION Secure Contacts integrates seamlessly into existing enterprise environments with minimal effort. Administration and maintenance requirements remain low. TRY SECURE CONTACTS FREE FOR 30 DAYS Secure Contacts can be evaluated free of charge for 30 days in a business environment. TECHNICAL REQUIREMENTS A corporate license is required to use Secure Contacts. SUPPORTED PLATFORMS AND DATA SOURCES Microsoft 365, Microsoft Teams, Exchange Online, Microsoft Entra ID, Microsoft Intune, Salesforce, Microsoft Dynamics 365, HubSpot, LDAP directories, and any additional CRM and corporate directory systems. Deployment is typically handled by the IT department or a Secure Contacts administrator and requires approval by the organization. No external cloud services or additional infrastructure are required. The solution operates entirely within the organization's existing infrastructure. Operation, administration, and data remain under the organization's full control.

Screenshots

CellTrust SL2 for Microsoft4 screens
Secure Contacts4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

CellTrust SL2 for Microsoft ships an update every 3 months, Secure Contacts every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard1 real difference · 8 level
CellTrust SL2 for Microsoft versus Secure Contacts: the parameters behind the verdict, then further details
ParameterCellTrust SL2 for MicrosoftSecure Contacts
PriceFreeFree
Rating5.0 (4 ratings)5.0 (1 ratings)
Number of ratings4 — better1
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size146 MB43 MB
Age rating4+4+
DeveloperCellTrust CorporationProvectus Software GmbH

Customer experience

CellTrust SL2 for Microsoft

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Secure Contacts

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CellTrust SL2 for Microsoft

No in-app purchases

None

Secure Contacts

No in-app purchases

Questions

Is CellTrust SL2 for Microsoft free?
CellTrust SL2 for Microsoft is free to download, with no in-app purchases.
Is Secure Contacts free?
Secure Contacts is free to download, with no in-app purchases.
Which has better reviews, CellTrust SL2 for Microsoft or Secure Contacts?
CellTrust SL2 for Microsoft and Secure Contacts are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do CellTrust SL2 for Microsoft or Secure Contacts have ads?
Neither CellTrust SL2 for Microsoft nor Secure Contacts shows ads.
Which is updated more often, CellTrust SL2 for Microsoft or Secure Contacts?
CellTrust SL2 for Microsoft ships an update every 3 months, and Secure Contacts every 2 months. Most recently, CellTrust SL2 for Microsoft was updated on November 2, 2026 and Secure Contacts on November 3, 2026.

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