# Letro - Secure Communication — Chat & Enterprise Letters

> Secure, encrypted, and tamper-proof communication platform for businesses and governments. (iPhone/iPad app by Letro.)

- Source: https://appshunter.io/ios/app/letro-secure-communication/id6758909629 (this page in markdown: same URL + `.md`)
- Developer: [Letro](https://appshunter.io/developer/1875687658)
- Category: Business, Productivity
- Price: Free
- Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 12+
- Requires: iOS 18.5 · 257 MB
- Languages: American English, Basque, Belarusian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian and 28 more
- Released: 2026-05-06
- Data updated: 2026-08-20
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/letro-secure-communication/id6758909629/reviews.md

## What is Letro?

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.*

## Key features

- End-to-end encryption
- Blockchain-verified records
- Spam and phishing proof
- Role-based permissions
- Automated approval chains
- Decentralized and federated architecture
- Offline communication capability

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/letro-secure-communication/id6758909629/reviews.md

### 5/5 — Dedicated server

*2026-08-16*

For our organization, the dedicated server option was one of the main reasons to choose Letro. We wanted more control over where our communication is hosted while still having a modern and easy-to-use communication app. So far it has been a very good fit.

### 5/5 — Legal / professional-services user

*2026-08-16*

Letro feels designed for organizations that take confidentiality seriously. We particularly appreciate the combination of encrypted conversations, dedicated server support and the Letter feature. It fits professional communication much better than a typical messenger.

### 5/5 — Servers

*2026-08-15*

We use Letro for communication where confidentiality really matters. The encrypted messaging and privacy-focused approach give us much more confidence when discussing sensitive matters. Having our organization on a dedicated server is also a major advantage

## Frequently asked questions about Letro

### What makes Letro secure?

Letro utilizes end-to-end encryption built on the Matrix Protocol with quantum-resistant encryption. Your private keys never leave your device, ensuring only you hold the keys to your data. It also features blockchain verification for a permanent, tamper-proof record of all communications.

### How does Letro prevent spam and phishing?

Letro is designed to be virtually impossible to spam or phish through its architecture. It requires KYC verification for account creation and ensures users only communicate with verified contacts, eliminating suspicious links and credential theft.

### Can Letro be used offline?

Yes, Letro can function even when connectivity fails, subject to the private server solution. This makes it ideal for field operations, high-security environments, and regions with unreliable internet infrastructure.

### What are the enterprise features of Letro?

Letro offers enterprise-grade features including role-based permissions, access controls, automated approval chains, escalation paths, and full audit trails for regulated industries. Its end-to-end encryption scales across organizational hierarchies.

### Is Letro available on multiple devices?

Yes, Letro is supported on iPhone and iPad devices, allowing for secure communication across your Apple ecosystem.

### How often is Letro updated?

The latest version of Letro is 1.3.13, and it was last updated on 2026-08-16. This indicates a commitment to ongoing development and maintenance.

### What is the age rating for Letro?

Letro has an age rating of 12+, making it suitable for users aged 12 and above.

### Does Letro have ads?

No, Letro is ad-free and does not contain advertisements.

## Version history (last 5 releases)

### 1.3.13 — 2026-08-16

Some localization and quality-of-life fixes.

### 1.3.11 — 2026-07-23

Improvement in listening to voices and some quality-of-life fixes.

### 1.3.9 — 2026-07-16

Support for a dedicated server is included, along with some quality-of-life fixes.

### 1.3.7 — 2026-07-06

- Localization Improvement, especially in the German Language
- Notification pointer in the home screen improved.
- Some quality of life fixes in chats and LetroLetters

### 1.3.6 — 2026-06-20

Some minor bugs and quality of life fixes.

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## Related topics

[hypori halo](https://appshunter.io/ios/topics/hypori-halo) · [secure communication](https://appshunter.io/ios/topics/secure-communication)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*