Comparison

CellTrust SL2 vs Cloudbrink

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CellTrust SL2

This app provides a dedicated business number for your mobile device, separating personal and professional communications. It utilizes secure technologies for internal messaging and voice calls, ensuring compliance and eDiscovery readiness for enterprises.

Highlights
  • Assign dedicated Mobile Business Number (MBN)
  • Separate personal and business communications
  • SecureSMS® and SecureVoice™ technologies
  • Secure internal communications
  • eDiscovery and compliance support
  • BYOD handset compatibility
Features
Read full description

CellTrust SL2™ is an enterprise-level application that works by assigning a Mobile Business Number (MBN) to keep personal and business communications separate on a single, Bring Your Own Device (BYOD) handset, enabling communications without using the employee’s personal telephone number. Built on CellTrust’s SecureSMS® and SecureVoice™ technologies, this seamless solution also enables a secure connection for internal communications between SL2 users. This application is vital for enterprise communications that need to meet eDiscovery and compliance requirements. 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

Cloudbrink

This software-only platform offers high-performance, zero-trust access to business applications for remote users. It combines application performance with robust security, ensuring authenticated access based on user and device identity. The solution leverages advanced protocols and a distributed network to significantly boost performance for remote workers.

Highlights
  • High-performance zero-trust access
  • Software-only solution
  • Application performance enhancement
  • User and device authentication
  • Role-based access controls
  • Software-defined WAN
  • Cost reduction
Features
Read full description

Cloudbrink provides a high-performance and strong zero-trust access to business applications for users from anywhere. Cloudbrink is a completely software-only solution that combines application performance and zero-trust security into a single platform. Cloudbrink ensures users and devices are authenticated before providing any role-based access controls. Cloudbrink protocols overcome the slow downs that come from even the slightest packet loss in the network. Along with a true software-defined WAN and thousands of POPs, no one else can match the quality of experience that can deliver a 30x performance boost for your remote workers. Cloudbrink reduces costs on multiple fronts. There are no expensive hardware appliances like VPN concentrators needed. The thousands of PoPs are spun up and spun down as required to give you ultra-fast access to PoPs only when you are online. And the ability to consolidate SD-WAN, VPN, and ZTNA technologies into a single software solution again reduces costs.

Screenshots

CellTrust SL24 screens
Cloudbrink3 screens

Verdict

The call

The clearest difference is rating: Cloudbrink at 5.0 against CellTrust SL2's 3.2. CellTrust SL2's advantage is ratings volume (27 vs 4). On price, update cadence, ads and in-app purchases 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

Cloudbrink holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: CellTrust SL2 has 27 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

CellTrust SL2 ships an update every 2 months, Cloudbrink every 4 months. The most recent releases landed on September 11, 2026 and September 2, 2026 respectively.

Scorecard2 real differences · 8 level
CellTrust SL2 versus Cloudbrink: the parameters behind the verdict, then further details
ParameterCellTrust SL2Cloudbrink
PriceFreeFree
Rating3.2 (27 ratings)5.0 (4 ratings) — better
Positive reviews20.0% of reviews—
Number of ratings27 — better4
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.614.5 — better
Further details — not scored
Size130 MB40 MB
Age rating4+4+
DeveloperCellTrust CorporationCloudbrink Inc

Customer experience

CellTrust SL2

All ratings27 ratings
Positive55.6%
Neutral0.0%
Negative44.4%
Written reviews5 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

Cloudbrink

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

In-app purchases

None

CellTrust SL2

No in-app purchases

None

Cloudbrink

No in-app purchases

Questions

Is CellTrust SL2 free?
CellTrust SL2 is free to download, with no in-app purchases.
Is Cloudbrink free?
Cloudbrink is free to download, with no in-app purchases.
Which has better reviews, CellTrust SL2 or Cloudbrink?
Cloudbrink is rated higher. CellTrust SL2 averages 3.2 out of 5 from 27 ratings, while Cloudbrink averages 5.0 from 4 ratings.
Do CellTrust SL2 or Cloudbrink have ads?
Neither CellTrust SL2 nor Cloudbrink shows ads.
Which is updated more often, CellTrust SL2 or Cloudbrink?
CellTrust SL2 ships an update every 2 months, and Cloudbrink every 4 months. Most recently, CellTrust SL2 was updated on September 11, 2026 and Cloudbrink on September 2, 2026.

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