Very good encrypted chat software
I've never seen such a small chat application; it's still fully end‑to‑end encrypted.
Free
Price history
About
A private messaging app offering end-to-end encryption with quantum-resistant technology. Share messages, media, and moments with enhanced privacy controls and self-hosted server options.
✓End-to-end quantum-resistant encryption
✓Rich media sharing (text, photos, video, voice)
✓Group voice and video calls
✓Moments and Timeline for sharing
✓Auto-delete messages
✓Self-hosted server option
✓Two-Factor Authentication
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What's New in PaperPhonePlus
2.5.2
September 8, 2026
Added private/group chat batch downloads for up to 20 image, video, voice, or file messages, including original-filename handling, progress display, and partial-failure reporting. Fixed iOS batch downloads to use a native Files export sheet instead of unsupported WKWebView blob: downloads; success is now reported only after the user chooses a destination, while cancellation leaves the selection intact without a false completion message. Added server-local file storage compatibility. Avatars, group avatars, Moments, and Timeline media now request permanent storage, while private/group chat attachments use temporary storage governed by the server retention policy. Added startup discovery of the server's legacy R2 public URL so previously stored file links can be transparently mapped to the authenticated file endpoint; the last successful mapping remains available while offline or when connected to an older server. Fixed legacy avatar rendering across chats, contacts, profiles, group views, Moments, Timeline, notifications, and call overlays by applying the same legacy-file URL mapping already used by post media.
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FAQ
What makes PaperPhonePlus's encryption unique?
PaperPhonePlus uses hybrid quantum-safe cryptography, combining X25519 with Kyber KEM. This advanced encryption is designed to protect your messages not only from current threats but also from future quantum computing advancements.
Can I use PaperPhonePlus without providing a phone number or email?
Yes, PaperPhonePlus allows you to sign up with just a username, enhancing your privacy from the start. No phone number or email is required for account creation.
How does PaperPhonePlus handle message privacy and deletion?
Messages are end-to-end encrypted and can be set to auto-delete with timers ranging from 1 day to 30 days. Encryption keys are generated and stored solely on your device.
What kind of content can I share on PaperPhonePlus?
You can share text, photos, videos, voice messages, files, and stickers. The app also supports real-time voice and video calls, including group calls.
Does PaperPhonePlus have ads?
No, PaperPhonePlus does not contain advertisements. It is a completely ad-free experience for users.
What are the privacy controls for sharing content on the Timeline?
For your posts on the Timeline, you can set granular visibility settings, choosing to make them public, visible only to selected friends, or hidden from specific contacts. You can also post anonymously.
How often is PaperPhonePlus updated?
The latest version, 2.4.0, was released on 2026-08-12, indicating a recent update. The app is generally updated regularly to maintain security and introduce new features.
Is PaperPhonePlus available on multiple devices?
Yes, PaperPhonePlus is available for iPhone and iPad, offering a consistent experience across Apple's mobile platforms.
