Threema OnPrem vs Librem Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Threema OnPrem
This secure messaging solution offers organizations complete data sovereignty by hosting on their own servers. It provides end-to-end encrypted communication for teams, including voice and video calls, and secure file sharing, all protected by PIN or fingerprint.
- Self-hosted solution
- Complete data sovereignty
- End-to-end encrypted calls
- Secure file sharing
- Cross-platform compatibility
- PIN/fingerprint chat protection
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Threema OnPrem is the self-hosted communication solution for organizations with the highest security requirements. The combination of Threema’s proven security architecture and complete data sovereignty creates an independent communication environment that is unmatched in terms of confidentiality – ideal for government agencies, police forces, and industrial companies. Advantages of Threema OnPrem: • 100% data sovereignty through hosting on your own servers • Proven Threema security architecture • Confidential communication in teams, groups, and projects • End-to-end encrypted voice and video calls • Secure exchange of files and documents in all formats • Cross-platform use thanks to mobile app, desktop app, and web client • Additional protection of confidential chats with PIN or fingerprint NOTE: Before you can use this app, Threema OnPrem must be set up on your company server. For more information, visit threema.com/onprem. Enjoy using Threema OnPrem!
Librem Chat
This app provides secure text, voice, and video communication with end-to-end encryption. Share images, videos, and files in chat rooms while keeping conversations private. It is free and open-source software.
- End-to-end encryption
- Text chat rooms
- Voice and video calls
- Image, video, and file sharing
- Free and open-source
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* Chat rooms * Share images, videos, and files * Make voice and video calls * Keep your conversations secret with end-to-end encryption * Free and open-source software (FOSS)
Screenshots
Verdict
The clearest difference is rating: Threema OnPrem at 5.0 against Librem Chat's 3.8. Librem Chat's advantage is review sentiment (33% vs 0%) and ratings volume (11 vs 2). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Threema OnPrem holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Librem Chat has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 0% of Threema OnPrem's written reviews are positive against 33% of Librem Chat's, so the app with the better star average is not the one people write more warmly about.
Threema OnPrem ships an update fortnightly, Librem Chat monthly. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.
| Parameter | Threema OnPrem | Librem Chat |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.8 (11 ratings) |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | 2 | 11 — better |
| Update frequency | Fortnightly — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 102 MB | 116 MB |
| Age rating | 4+ | 4+ |
| Developer | Threema GmbH | PURISM, SPC |
Customer experience
Threema OnPrem
Librem Chat
In-app purchases
Threema OnPrem
No in-app purchases
Librem Chat
No in-app purchases
