Letro - Secure Communication
Chat & Enterprise Letters
Free · Designed for iPad. Not verified for macOS.
Email is insecure. Chat isn't compliant. Letters are stuck in the past. Letro replaces all three.
Letro is the next generation of secure formal communication — built for the way enterprises, governments, law firms, and financial institutions actually work. Like email, but end-to-end encrypted, spam-free, phishing-proof, and verified by blockchain. Every message you send leaves a permanent, tamper-proof record.
**End-to-End Encryption Built for the Future**
Every message, file, and document is encrypted on your device before it leaves the app. Built on the Matrix Protocol — combined with quantum-resistant encryption — Letro protects your communications today and shields them against tomorrow's quantum computing threats. Your private keys never leave your device. Only you hold the keys to your data.
**Zero Spam. Zero Phishing. By Design.**
Unlike legacy email, Letro makes spam and phishing attacks virtually impossible — not through filters, but through architectural design. No suspicious links. No credential theft. No inbox chaos. Just verified communication with people you trust. No user can create two account with the same identity and without KYC verification, one cannot create an account.
**Enterprise-Grade. Government-Ready.**
Letro is purpose-built for organizations with complex compliance requirements:
• Role-based permissions and access controls
• Automated approval chains and escalation paths
• Full audit trails for regulated industries
• End-to-end encryption that scales across organizational hierarchies
Trusted by teams in finance, law, government, and high-security enterprise environments.
**Decentralized & Federated — Your Server, Your Rules**
Letro runs on a fully decentralized, federated architecture. Unlike centralized platforms where one company controls all your data, Letro federates across independent private servers. Organizations can purchase and deploy their own dedicated Letro server, giving your business complete sovereignty over your communication infrastructure. Your messages never touch a server you don't control. Thanks to the Matrix protocol, companies and client can communicate with each other externally even when they run Letro on their private server.
** Works Without the Internet**
Subject to the private server solution, Letro functions even when connectivity fails. Perfect for field operations, high-security environments, and regions with unreliable infrastructure. Reliable communication, everywhere.
**Who Uses Letro?**
- Teams replacing Slack and email with encrypted internal messaging on their own server
- Businesses dealing with highly sensitive documents and internal communications
- Enterprises with multiple client communications
- Law firms requiring certified, tamper-proof document exchange
- Banks and financial institutions needing auditable, compliant messaging
- Government agencies demanding sovereign, encrypted communication channels
- Enterprises building secure internal and client-facing communication workflows cross border or national
- Privacy-conscious professionals who refuse to compromise on security
**Your Data. Your Server. Your Rules. Always.**
Letro holds no private keys and collects no message content. Deploy on your own private server for total data sovereignty — or use Letro's network and still maintain full end-to-end encryption. Zero surveillance. Zero data mining. No central authority. No exceptions.
*Download Letro — and finally communicate with confidence.*
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Support for a dedicated server is included, along with some quality-of-life fixes.
The developer, Letro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Letro Tech GmbH
- Size
- 269 MB
- Category
- Business
- Compatibility
Requires iOS 18.5 or later.
- iPhone
Requires iOS 18.5 or later. - iPad
Requires iPadOS 18.5 or later. - Mac
Requires macOS 15.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.5 or later.
- iPhone
- Location
- This app may use your location even when it is not open, which can decrease device battery life.
- Languages
English and 37 more
- English, Basque, Belarusian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, Georgian, German, Greek, Hungarian, Indonesian, Italian, Japanese, Korean, Lithuanian, Norwegian Bokmål, Persian, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Traditional Chinese, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Welsh
- Age Rating
13+
- 13+
- Infrequent
Realistic Violence
Mature or Suggestive Themes
Sexual Content or Nudity
Guns or Other Weapons
Contains
Messaging and Chat
User-Generated Content
- Copyright
- © Letro Tech GmbH, 2025