Arc -The Intelligent Messenger

Arc: The World's Most Advanced Intelligent Messenger

We may still be a nameless startup, but we have rebuilt the very concept of messaging apps from scratch to challenge the world's most difficult technological frontiers. By breaking existing frameworks, we provide the freedom of communication and privacy to people all around the world.

Arc is a next-generation intelligence bridge that redefines human connection, built on three core pillars: Accessible, Reliable, and Confidential.

・National Security-Level Security through Multi-Layered Defense

The foundation of Arc is based on the world-standard Signal Protocol, enhanced with our proprietary 4 Encryption Methods and 3 Security Layers to implement a robust multi-layered defense system.

Post-Quantum Cryptography (PQC) Implementation
We feature the latest quantum-resistant encryption algorithms (PQXDH + ML-KEM-768), capable of withstanding threats from future quantum computers. We protect your communications with the most advanced technology available today.

AEGIS (Advanced Encryption and Global Information Security)
This mathematically guarantees the authenticity and integrity of every message. By eliminating tampering and impersonation, we push information reliability to its absolute limit.

Complete Anonymity (Sealed Sender)
It is impossible for even the server to know who sent a message to whom—metadata itself is kept entirely private and beyond the reach of any third party.

Multi-Layered End-to-End Encryption (E2EE)
We provide powerful encryption as a standard for all users. We leave no room for third parties to intercept or read information between you and your recipient.

・Connected in Any Environment

Arc aims to be a lifeline, not just for daily conversations, but during large-scale communication failures, natural disasters, or emergencies where the internet is cut off.

Proprietary Mesh Network
Even when internet or mobile networks are unavailable, you can exchange messages with nearby users via device-to-device communication using Bluetooth and other technologies. It functions as a vital backup during disasters or emergencies.

High-Ratio Data Compression (1/5 to 1/10)
Message data is highly compressed to between 1/5 and 1/10 of its original size. This ensures reliable delivery even over unstable, low-speed connections while minimizing data consumption.

・Ignite the Fire (IGF): Liberation from Digital Records

In an era of digital tattoos, Arc chooses the path of disappearance. Based on our core concept, Ignite the Fire, all messages are completely erased from devices and servers after a set period. Dialogue free from permanent records brings a unique spark to your communication, allowing you to cherish the here and now.

・Changing the World from Japan

With Japanese technical prowess and uncompromising aesthetics, we are taking on the global tech giants. Currently supported by Google, we have realized a world-class development environment.

We are frequently updating as we head toward our official launch in May 2026. In this process, because we prioritize system optimization and security enhancement, there is a high possibility that existing messages may become undecryptable and past conversations may become inaccessible after an update. We ask for your understanding as this is a necessary step in building the next generation of communication infrastructure.

Arc was reborn to protect your freedom and safety. Express your true self with peace of mind and rediscover the joy of communication.

The story of you and all of us starts here.