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When a data breach means regulatory penalties, patient harm, or compromised operations, a smartphone app is not enough. SimpleGo provides dedicated, hardware-encrypted communication that never touches a phone.
GDPR-compliant patient communication for clinics, practices, and care facilities. No cloud storage, no metadata, no smartphone required. Dedicated device for medical staff.
Secure machine-to-machine communication for industrial control systems, energy infrastructure, and building automation. Hardware-encrypted command channels with zero attack surface.
Board-level communications, M&A negotiations, sensitive HR matters. Dedicated devices that stay in the office, leave no traces on personal phones, and cannot be remotely compromised.
Source protection with no phone number, no metadata, and no persistent identity. Physical device that can be wiped, handed over, or destroyed without compromising the network.
After analyzing more than 70 devices across consumer, military, and open-source domains, the maximum feature overlap found in any single product is three out of six. SimpleGo is designed to achieve all six.
Four cryptographically independent envelopes around every message: Double Ratchet with post-quantum hybrid key exchange, per-queue NaCl, server-to-recipient NaCl, and onion forwarding. Plus three additional TLS 1.3 tunnels for transport.
World First in HardwareNo Android. No Linux. No smartphone OS. Runs directly on the microcontroller via FreeRTOS with approximately 50,000 lines of C - three orders of magnitude less code than a phone.
ImplementedNo cellular baseband with DMA access running proprietary firmware. Eliminates the entire class of baseband vulnerabilities that affect every smartphone on the market.
By DesignNo user IDs, phone numbers, or usernames. Communication uses ephemeral unidirectional queues. No party - including relay servers - can correlate senders and recipients.
Protocol DesignTriple-vendor architecture: Microchip ATECC608B, Infineon OPTIGA Trust M, NXP SE050. No single supply-chain compromise can extract the full key material.
Novel ConceptSoftware under AGPL-3.0, hardware under CERN-OHL-W-2.0. Audit every line of code, verify every PCB trace, build your own. No black boxes, no trust assumptions.
Public RepositoryMost messaging protocols use two encryption layers: end-to-end plus TLS transport. SimpleGo wraps every message in four independent envelopes, each with different keys, algorithms, and nonces. Compromising one layer does not weaken any other.
A native C implementation of the SimpleX messaging protocol running on bare-metal hardware. Written from scratch, verified for interoperability with the official reference application.
| Aspect | Smartphone | SimpleGo Device |
|---|---|---|
| Codebase | ~50,000,000 lines | ~50,000 lines |
| Baseband Processor | Closed-source, DMA access, always active | None |
| Background Services | Hundreds with network access | Single application |
| Telemetry | Continuous OS + app collection | Zero |
| Key Storage | Software or TEE | Hardware Secure Element |
| Tamper Detection | None | Active monitoring + zeroization |
| Encryption Layers | 2 (E2E + TLS) | 4 per-message + 3 TLS tunnels |
| Regulatory Fit | Personal device, mixed use | Dedicated, auditable, GDPR-ready |
Different threat models require different protection levels. From developer-friendly to state-resistant - one codebase, three security architectures. Made in Germany.
Developers, small practices, privacy-aware users
Clinics, law firms, enterprise teams
Government, high-risk individuals, critical infrastructure
SimpleGo controls the entire communication path. The hardware client speaks to our own relay infrastructure built on GoRelay, a zero-knowledge server written in Go. Fully compatible with SimpleX Chat. No accounts, no logs, no metadata.
No corporation. No venture fund pulling strings. Just relentless engineering and a belief in freedom.
SimpleGo is the world's first native C implementation of the SimpleX Messaging Protocol, running bare-metal on dedicated hardware. No Android. No baseband processor. No smartphone attack surface. Every layer was reverse-engineered, verified byte-by-byte against the reference implementation, and written from scratch.
Built by a single engineer in Recklinghausen, Germany, driven by a multi-agent AI workflow and an obsession with getting the cryptography exactly right. Code here is not just function. It is craft. Every module is shaped with the care of an artist and the rigor of a security researcher.
Freedom of speech is not negotiable. Private communication is a human right, not a privilege granted by platforms. SimpleGo exists so that no corporation, no government, and no algorithm ever sits between you and the people you talk to.
And the work does not stop at hardware. In active development: Carvilon CyberDesk, a secure cross-platform environment written in Rust, with SimpleGoX, the native multi-messenger, built right in. One hardened ecosystem, from a 10 euro microcontroller all the way to the desktop.
