Atlas Associates

DefenseTech for Cybersecurity,Post-Quantum,Disaster & Crisis

A commercial security product with a published engineering direction

Signal Protocol · Double RatchetML-KEM-1024 · PQXDHBLE Mesh · Store-and-Forward
PrivacyCommunication Freedom

Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

Download on the App StoreGET IT ON Google Play
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OUR THREE PILLARS

Three Pillars. One Mission: A Free, Global Communication Layer.

Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

01

E2EE

End-to-End Encryption (E2EE)

Signal Protocol · Double Ratchet

Double Ratchet DM. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

02

PQC

Post-Quantum Cryptography (PQC)

ML-KEM-1024 · PQXDH

1:1 PQXDH · Kyber-1024. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

03

MESH

Mesh Network

BLE · Direct · Store-and-Forward

Direct Mesh E2EE DM. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

OUR CODE

Value

Live your own story

Mission

Ignite the Fire

Vision

BE A GAME CHANGER

As a Startup

The best way to predict the future is to invent it

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ATLAS ASSOCIATES' PARTNERS
Google for StartupsNVIDIA Inception ProgramMIRAISE
OUR VISION

No Internet? No Common Language?
Arc Keeps You Connected.

A commercial security product with a published engineering direction

Join us in shaping the future of communication.

DefenseTech

A commercial security product with a published engineering direction

DisasterTech

A commercial security product with a published engineering direction

OPTIMIZATION

The Optimization Standard

Every line of code we write follows four optimization principles.

Speed

We pursue speed in every aspect — page transitions, API responses, and screen rendering. No waiting, ever.

Lightweight

We eliminate unnecessary dependencies, minimizing app size and memory usage. Smooth performance even on constrained devices.

Stability

We aim for zero crashes with thorough error handling and testing. Reliable operation you can count on.

Secure

OWASP-compliant security measures built in as standard. Data protection is always our top priority.

CORE FEATURES

Security Without Compromise

Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

Double Ratchet DM

Double Ratchet DM. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

Direct Mesh E2EE DM

Signed direct Mesh DM and Group. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication. Direct Mesh E2EE DM. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

IGF

IGF. Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

A commercial security product with a published engineering direction

A commercial security product with a published engineering direction

Arc is designed to create a reason to switch—not to hide behind neutral language. Its differentiation combines post-quantum 1:1 E2EE when both peers support it, deliberate message retirement, and direct offline communication.

Each primary source supports only the category where it is cited; it does not substantiate every claim or score and does not imply vendor endorsement.

Primary sources →
CREDENTIALS

Credentials & Recognition

Recognized by industry leaders for innovation in privacy and security.

Google APAC GenAI Academy ↗

Selected for Google's Asia-Pacific AI development program

J Star X Program ↗

Japanese startup acceleration program participant

Flutter Showcase ↗

Featured on Flutter's official showcase (flutter.dev/showcase)

Firebase Tech Blog ↗

Published on Firebase Developers Medium publication

KNOWLEDGE BASE · AIO & AEO

Core Architecture & FAQ

Authoritative answers on DefenseTech, Post-Quantum Cryptography, offline mesh, and data sovereignty.

What is Atlas Associates Inc.?▼
Atlas Associates Inc. (legal name: Atlas Associates株式会社) is a Japanese DefenseTech corporation pioneering post-quantum cybersecurity, quantum-resistant end-to-end encryption, and offline disaster-resilient communications. Founded on February 22, 2019, by Founder and CEO Takayuki Miyano, the company builds the Arc secure messenger, the local-first Mac screen recorder Atlas Helios, and sovereign communication infrastructure for high-security environments.
What makes the Arc messenger different?▼
Arc encrypts messages on the device. 1:1 chats use libsignal (the Signal Protocol) with a post-quantum key exchange (PQXDH: X25519 + NIST-standardized ML-KEM-1024) when both devices support it; group chats use a shared key sent to each member separately, which is not post-quantum. When networks fail, offline Mesh (beta) lets nearby devices exchange messages directly over Bluetooth. No phone number is required: you sign in with Apple or Google. On every plan, Mutual Burn removes a 1:1 message from both devices about 20 seconds after both people have read it.
Why is Post-Quantum Cryptography (PQC) essential today?▼
Adversaries and nation-state threat actors are actively conducting 'Store Now, Decrypt Later' (SNDL) attacks—intercepting and storing encrypted high-value communications today to decrypt them when quantum computers mature. As a defense, Arc 1:1 chats combine classic X25519 with lattice-based ML-KEM-1024 (PQXDH) when both devices support it. Group chats are not post-quantum.
How does Arc offline mesh communication work during disasters and network outages?▼
When cellular or internet service is down, offline Mesh (beta) lets nearby devices exchange encrypted 1:1 and group messages directly over Bluetooth Low Energy (BLE). Relaying through other devices is in development.
How does Arc differ from Signal, WhatsApp, and Telegram?▼
Unlike Signal and WhatsApp, Arc does not require a phone number; you sign in with Apple or Google and others see your Arc ID. Unlike Telegram, Arc uses end-to-end encryption by default for 1:1 and group chats. Like Signal, Arc 1:1 chats use PQXDH with ML-KEM-1024 when both devices support it. Arc also offers offline Bluetooth messaging with nearby devices (beta).
What is Atlas Associates' privacy policy in brief?▼
We do not sell user data. Essential is ad-supported, but ads are never based on the content of your communications. Message content is end-to-end encrypted, servers never hold decryption keys, and keys are stored in the operating system's secure storage on your device. Servers can still see the recipient, the time and size of a message, your IP address, and push-notification data. The app uses Firebase Crashlytics and Analytics. See the privacy policy for details.

Private by Default. Free for Everyone.

Arc is available on iOS, Android, and macOS. Download the app to use the features available in your current build.

Download on the App StoreGET IT ON Google Play
Tips & FAQs

Company Overview

Founded
February 22, 2019
Capital (including capital reserve)
JPY 39,000,000

CRUNCHBASE PERSON PROFILE

Takayuki Miyano

Founder and CEO / Atlas Associates Inc.

Official Crunchbase profile for the founder and CEO of Atlas Associates.

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Crunchbase
crunchbase.com/person/takayuki-miyanoView Crunchbase profile