A decentralized and democratic world where people can communicate freely and securely even when internet infrastructure is unavailable, restricted, or collapsed.
To develop a flexible, user-friendly mesh communication system with military-grade security that does not require traditional infrastructure.
System must be fully functional without internet or GSM networks
All communication encrypted end-to-end using modern cryptography standards
No dependency on a single authority or server
Intuitive interface similar to popular messaging apps
Modular architecture responding to different range, speed, and cost needs
Everything you need for secure offline communication
End-to-end encryption with Ed25519 and ChaCha20-Poly1305. Zero-Knowledge architecture ensures complete privacy.
Works without internet or GSM. BLE, LoRa, and FSK protocols for different range and speed needs.
Familiar interface with group messaging, voice messages, location sharing, and file transfer.
Extend range with Gateway devices. From Lite to Pro models for different use cases.
Proprietary Adaptive Congestion-Free Routing prevents network congestion even under heavy load.
Start with just your smartphone. No additional hardware needed for basic mesh communication.
Choose the model that fits your needs
No Hardware Required
Start communicating immediately with just your smartphone. No additional hardware needed.
Extended Range
Extend your range to kilometers with a budget-friendly Gateway Lite device.
Full Features
Professional-grade communication with voice, media, and high-speed mesh networking.
Global Connectivity
Connect your mesh network to the internet while maintaining full control and privacy.
Where MOSA makes a difference
Coordinate off-road expeditions and mountain adventures. GPS tracking and emergency communication in remote areas.
Group communication in camping areas. Share photos and location without internet connectivity.
Maintain communication when infrastructure collapses. Emergency signals and coordination during natural disasters.
Operational communication with military-grade security. Encrypted messaging and voice coordination.
Build local mesh networks for communities. Decentralized infrastructure for neighborhoods and villages.
First responders and emergency services can coordinate even when traditional networks fail.
Built with modern, reliable technologies
Flutter (Dart) - Cross-platform mobile application for iOS and Android
C/C++ - Embedded firmware for Gateway devices
PHP (Laravel) + Go/Node.js - Server software for Internet Gateway
Military-grade encryption algorithms
True freedom in communication
MOSA operates without central servers. Your messages are relayed through a peer-to-peer mesh network, ensuring no single point of failure or control.
MOSA is open-source software. Review the code, contribute, or host your own infrastructure. Transparency and trust through open development.
Available for iOS and Android
Download the latest APK directly (v1.0.0, Build 1)
Extend your communication range with Gateway devices
BLE ↔ LoRa Bridge
FSK Mesh + PTT Voice
Flagship Dual-Processor
MOSA is open-source. You can host your own Internet Gateway for full control, privacy, and customization.
Get comprehensive help with MOSA
Find answers to common questions about MOSA
MOSA (Mesh Offline Secure Architecture) is a military-grade secure offline mesh communication system developed by Talivio Technology OÜ. It allows you to communicate without internet or GSM networks using standard smartphones or optional Gateway devices. MOSA uses mesh networking technology where devices connect directly to each other, relaying messages through the network to reach their destination.
No! You can start using MOSA with just your smartphone. The app uses your phone's built-in Bluetooth (BLE) to create a mesh network with nearby devices. Gateway devices (Lite, Pro, Platinum) are optional and extend the communication range significantly. For basic mesh communication within 30-50 meters, no additional hardware is needed.
MOSA uses mesh networking technology. Your phone connects directly to nearby devices using Bluetooth Low Energy (BLE), LoRa, or FSK protocols. When you send a message, it's encrypted and relayed through the mesh network - hopping from device to device until it reaches the destination. The network is completely decentralized, meaning there are no central servers required.
Yes! MOSA uses military-grade encryption: • End-to-end encryption (E2EE) with ChaCha20-Poly1305 • Digital signatures with Ed25519 • Key exchange with X25519 • Forward Secrecy (past messages remain secure even if a key is compromised) • Zero-Knowledge architecture (even Gateway operators cannot see message content) • Local storage encryption with AES-256-GCM Your messages are encrypted before leaving your device and can only be decrypted by the intended recipient.
MOSA Core is completely free forever and includes: • Unlimited mesh messaging • Group chats • Location sharing • Offline features • Emergency signals • No ads Paid plans (Bridge Unlimited €19.99/month, Bridge Pro €49.99/month) add: • Bridge to WhatsApp/Telegram • Media sending (low resolution) • Cloud backup • Advanced analytics • Email support All core mesh features remain free forever.
Message range depends on the communication mode: • BLE Mesh (smartphones only): 30-50 meters between devices • Gateway Lite (LoRa): 1-5 km range • Gateway Pro (FSK): 300m-1km range with higher bandwidth • Gateway Pro (LoRa fallback): 1-5 km range • Gateway Platinum: Same as Pro but with dual-processor optimization Messages can travel much farther by hopping through multiple devices in the mesh network.
Yes! MOSA is specifically designed for disaster situations: • Works without internet or cellular networks • ACFR algorithm prevents network congestion even under heavy load • Emergency messages get priority routing • Mesh network is self-healing (if one device fails, messages find alternative routes) • Battery-efficient for extended use However, MOSA is not a replacement for official emergency services (112 in EU). Always contact official emergency services for life-threatening situations.
Beta testing is planned for Q1 2026. The official release is scheduled for Q4 2026. You can sign up for beta testing on our website or contact us at [email protected] to express interest.
MOSA is compatible with: • iOS 14.0 or later (iPhone and iPad) • Android 8.0 (API level 26) or later • Devices with Bluetooth 4.0+ (BLE support) • For Gateway features: Gateway Lite, Pro, or Platinum devices Minimum requirements: • 100MB free storage • Active Bluetooth • Location permission (required for BLE scanning on Android)
No! For basic mesh communication, MOSA does not require: • Phone number • Email address • Account registration • Internet connection You can start using MOSA immediately after installation. However, if you want to use Bridge features (connecting to WhatsApp/Telegram), you'll need to create an account with an email address.
Group messaging in MOSA: • Create groups with up to 256 participants • Messages are encrypted and sent to all group members • Group messages are relayed through the mesh network • All participants must be within mesh range (or connected via Gateway) • Group admins can manage participants • Message history is stored locally on each device Group messaging works the same way as individual messages - they're just sent to multiple recipients simultaneously.
Yes, but with limitations: • Media sharing requires Gateway Pro or Platinum • Only works in FSK mode (not LoRa) • File size limit: <10MB recommended • Transfer speed depends on signal quality • Supported formats: JPEG, PNG, MP4, MP3, PDF Media is compressed and encrypted before sending. Large files may take time to transfer depending on network conditions.
Gateway models comparison: Gateway Lite (~€50): • BLE ↔ LoRa bridge • Range: 1-5 km (LoRa) • Text and location only • No voice or media • ~24 hour battery life • Best for: Budget users, long-range text messaging Gateway Pro (~€150): • FSK/LoRa mesh + PTT voice • Range: 300m-1km (FSK) or 1-5km (LoRa) • Full features: voice, media, text • Group voice calls (6+ participants) • ~27 hour battery life • Best for: Professional users, off-road groups Gateway Platinum (~€60): • Dual-processor architecture • 1.9" LCD screen (standalone use) • 6800mAh battery (~85 hours idle) • All Gateway Pro features • Best for: Critical operations, command centers
Gateway setup is straightforward: 1. Power on the Gateway device 2. Open MOSA app on your phone 3. Go to Settings > Gateway 4. Tap 'Scan for Gateways' 5. Select your Gateway from the list 6. Follow on-screen pairing instructions 7. Configure protocol preferences (if applicable) For detailed setup instructions, see our Help section or contact [email protected]
Yes! MOSA is open-source and you can host your own Internet Gateway. This gives you: • Full control over the gateway • No reliance on third-party services • Custom configuration • Enhanced privacy Requirements: • Linux server (Ubuntu 22.04+ recommended) • PHP 8.1+ • MySQL 8.0+ or PostgreSQL • SSL certificate Documentation: • Installation guide: docs/09_Internet_Gateway/gateway_installation_guide.md • Deployment guide: docs/12_Deployment/PRODUCTION_DEPLOYMENT_GUIDE.md • Security guide: docs/09_Internet_Gateway/gateway_security_guide.md You can also use the official Talivio Gateway at gateway.talivio.com
ACFR (Adaptive Congestion-Free Routing) is MOSA's proprietary routing algorithm that prevents network congestion: • Monitors local network congestion at each node • Gives priority to emergency packets • Randomly delays low-priority packets • Calculates alternative routes to avoid congested areas • Uses trust scores to isolate malicious nodes This ensures the network remains functional even under heavy load, making it ideal for emergency situations.
MOSA uses a Zero-Knowledge architecture: • Messages are end-to-end encrypted (we cannot read them) • All data stored locally on your device • No central servers storing message content • Gateway operators cannot see message content • Minimal data collection (only what's necessary) • GDPR compliant Your privacy is protected by design, not by policy. Even if we wanted to, we cannot access your messages due to mathematical encryption guarantees.
If you lose your phone: • Your messages are stored locally on the device (encrypted) • If the device is locked, messages remain encrypted • You cannot recover messages from another device (by design, for privacy) • Your contacts can still message you (if they have your device ID) • You'll need to set up a new profile on a new device For Bridge features with cloud backup (Bridge Pro), you can restore some data if you had backup enabled.
Yes! MOSA works anywhere in the world: • No geographic restrictions • Works in any country • No roaming charges (no internet needed) • Protocol frequencies are legal in most countries • LoRa uses 868MHz (EU) or 915MHz (US) - check local regulations Note: Some countries may have restrictions on radio frequencies. Check local regulations before using Gateway devices.
Battery usage depends on usage: Light usage (occasional messages): • ~2-5% per hour • Minimal impact on battery Active mesh (frequent messaging): • ~5-10% per hour • Similar to other messaging apps With Gateway device: • Phone battery usage reduced • Gateway handles mesh communication • Phone only needs BLE connection Tips to save battery: • Close app when not in use • Reduce scan interval • Use Gateway devices to offload mesh communication
Yes! MOSA is open-source software: • Source code available on GitLab • GPL-3.0 license (core components) • Some components under MIT license • Community contributions welcome • Full transparency You can: • Review the code • Contribute improvements • Host your own gateway • Customize for your needs See our GitHub/GitLab repository for source code and contribution guidelines.
MOSA currently supports: • English (primary language) • Turkish (Türkçe) • Estonian (Eesti) More languages will be added based on community demand. If you'd like to contribute translations, please contact us at [email protected]
You can report bugs or request features: • Email: [email protected] • GitHub/GitLab Issues: Create an issue on our repository • In-app feedback: Use the feedback option in app settings Please include: • Device model and OS version • App version • Steps to reproduce (for bugs) • Screenshots (if applicable) We appreciate your feedback and will review all submissions.