Comparison

Thetis Authenticator vs OpenCloud

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

Head to head
About

Thetis Authenticator

Manage your FIDO2 security keys for passwordless login and two-factor authentication. Supports NFC and Type-C connections for seamless integration across devices. Offers one-time password management for services not yet supporting FIDO2.

Highlights
  • FIDO2 passwordless login
  • Enhanced two-factor authentication
  • One-time password management
  • Optimized for iPad
  • NFC and Type-C compatibility
  • Cross-platform support
  • Phishing-resistant authentication
Read full description

The Thetis Authenticator App provides seamless management of your FIDO2 security keys, enabling passwordless login, two-factor authentication (2FA), and one-time password (OTP) management. Fully optimized for iPhone and iPad, the app supports NFC and Type-C connections, ensuring compatibility across all your devices. With full support for the FIDO2 security standards, Thetis Authenticator empowers you with fast and phishing-resistant authentication. Whether managing business or personal accounts, you can easily integrate Thetis FIDO2 into your daily workflow. Key Features: ●. FIDO2 Passwordless Login: Replace passwords with strong, FIDO2-based authentication for secure access across platforms. ●. Enhanced 2FA: Strengthen your account security with FIDO2-based two-factor authentication for supported services. ●. Complete OTP Management: Add and manage one-time passwords (OTP) for services that don’t support FIDO2. ●. Optimized for iPad: Manage your keys with ease on a larger screen, with full iPad optimization. ●. NFC and Type-C Compatibility: Effortlessly connect using NFC or Type-C for fast key setup. ●. Cross-Platform Support: Use Thetis FIDO2 for services like Google, Dropbox, Microsoft, AWS, and more. ●. Phishing-Resistant Authentication: Built on the FIDO2 standard, ensuring your accounts are protected. Simplify your security and manage your digital identity with ease using Thetis FIDO2.

About

OpenCloud

Manage and collaborate on files with real-time synchronization and secure data rooms. Features smart search and integrated web office tools for seamless teamwork and digital sovereignty.

Highlights
  • Real-time file synchronization
  • Secure data rooms for collaboration
  • Full-text and metadata search
  • Integrated web office suite
  • Digital sovereignty
Features
Read full description

Excellent file management and collaboration for public authorities, providers and business - or anyone who values ease of use and digital sovereignty. File Sync & Share Changes to documents are synchronized in real time, ensuring all team members always have access to the latest version. Workspaces Create data rooms that enable access for all team members and promote efficient collaboration. Files and folders can be organized, managed and securely shared in these central areas. Smart Search The full-text and metadata search allows you to browse through all documents and files, quickly discovering relevant information. Whether you’re searching for specific terms within the text or metadata such as creation date or author, finding what you need is effortless. Web Office With OpenCloud's integrated office applications, teams can work on documents in real time – whether it’s text, spreadsheets, or presentations.

Screenshots

Thetis Authenticator4 screens
OpenCloud4 screens

Verdict

The call

The clearest difference is rating: OpenCloud at 4.2 against Thetis Authenticator's 3.5. OpenCloud also leads on update cadence (every 3 weeks vs every 9 months) and review sentiment (83% vs 60%). Thetis Authenticator's advantage is iOS requirement (13.0 vs 15.4). On price, ads, in-app purchases and monetization model 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

OpenCloud holds the better App Store score, 4.2 against 3.5. That said, the two scores are not equally well evidenced: OpenCloud has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 60% of Thetis Authenticator's written reviews are positive against 83% of OpenCloud's.

UpkeepUpdate frequency

Thetis Authenticator ships an update every 9 months, OpenCloud every 3 weeks. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 5 level
Thetis Authenticator versus OpenCloud: the parameters behind the verdict, then further details
ParameterThetis AuthenticatorOpenCloud
PriceFreeFree
Rating3.5 (4 ratings)4.2 (21 ratings) — better
Positive reviews60.0% of reviews83.3% of reviews — better
Number of ratings421 — better
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.4
Further details — not scored
Size3 MB26 MB
Age rating4+4+
DeveloperRazzo Tech CorporationOpenCloud GmbH

Customer experience

Thetis Authenticator

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

OpenCloud

All ratings21 ratings
Positive76.2%
Neutral9.5%
Negative14.3%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Thetis Authenticator

No in-app purchases

None

OpenCloud

No in-app purchases

Questions

Is Thetis Authenticator free?
Thetis Authenticator is free to download, with no in-app purchases.
Is OpenCloud free?
OpenCloud is free to download, with no in-app purchases.
Which has better reviews, Thetis Authenticator or OpenCloud?
OpenCloud is rated higher. Thetis Authenticator averages 3.5 out of 5 from 4 ratings, while OpenCloud averages 4.2 from 21 ratings.
Do Thetis Authenticator or OpenCloud have ads?
Neither Thetis Authenticator nor OpenCloud shows ads.
Which is updated more often, Thetis Authenticator or OpenCloud?
Thetis Authenticator ships an update every 9 months, and OpenCloud every 3 weeks. Most recently, Thetis Authenticator was updated on June 1, 2026 and OpenCloud on September 21, 2026.

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