NEVER SURVEILLANCE
NEVER UTILIZATION
JUST DELETE
Live Your Own Story
The Intelligent Messaging App
for the NextGen
Arc is a revolutionary messaging app that makes your conversations secure, private, and deeply personal. It provides unmatched security by automatically deleting messages from all devices and servers after a set time.
Inheriting the philosophy and principles of our former brand, Nocturne, Arc aims to be a bridge that connects people with the highest level of user privacy protection technology. Our name stands for Accessible, Reliable, and Confidential.
Arc's Intelligent Security
We're enhancing our encryption with a new three-tier system to give users more control over their privacy, launching in Q2 2026:
-
Freemium: Provides standard end-to-end encryption.
-
Standard: Adds enhanced security features.
-
Intelligence: The highest level of protection, with advanced anti-impersonation technology.
Our proprietary high-compression technology ensures fast messaging even with a weak signal. During emergencies, our offline mesh network connects you with people nearby, so you are never truly alone. Paid plans will also allow users to set longer time limits for messages or even turn the disappearance feature off entirely.
Our GenAI companion provides empathetic support whenever you feel lonely.
The Story of Our Name
We rebranded to Arc, our internal project name since 2023, but our mission remains rooted in the philosophy of Nocturne. The name Nocturne was inspired by the idea that "cherishing the present creates wonderful memories when looking back in the future." We want users to cherish and enjoy every message. We hope to reduce the sadness caused by the inability to express emotions properly or misunderstandings. Ultimately, we aim to create a market that improves the digital world through a messaging app that makes users feel comfortable.
This philosophy took on new meaning and was passed down to Arc on the morning of September 9, 2025. It was a moment when, while caring for my father-cat who was soon to pass away, I suddenly had an inspiration for a new and innovative security architecture that would bring true happiness to our users. We rebranded to Arc to carry on this very feeling.
Arc: Accessible, Reliable, Confidential.
Arc's Core Strengths:
Engineered for Unrivaled Communication
Arc is a next-generation disappearing messaging app powered by defense-grade technology and proprietary high-efficiency compression.
With blockchain and end-to-end encryption (E2EE), your communications—including group chats—are protected at the highest level, and messages vanish automatically.
Experience ultra-lightweight, lightning-fast, and deeply private conversations—built for those who value true digital privacy.
Advanced Security & Privacy Protection
-
Enhanced End-to-End Encryption: Your conversations are shielded with robust end-to-end encryption, ensuring that only you and the intended recipient can read your messages. This offers the highest level of security for communication, minimizing the risk of information leakage or interception.
-
Blockchain-Based Digital ID and Information Management: Our unique digital ID, "Ciphergrid," uses blockchain technology to secure user identities, prevent impersonation, and allow secure login with other social accounts. This ensures only authorized parties access critical information, enhancing trust in data management.
-
Robust Data Protection and Multi-Factor Authentication: Your data is stored securely on our servers with advanced encryption and access controls, protecting it from cyber threats and data breaches. Multi-factor authentication adds an extra layer of security, preventing unauthorized access even if a password is compromised.
Stable Connectivity in Challenging Environments
-
Mesh Network Connectivity: Even when internet infrastructure is unavailable or unstable, devices can form direct communication networks, dramatically improving communication resilience. This is essential for remote areas or emergency situations.
-
Advanced Compression Technology: Our proprietary compression technology optimizes data transmission. This enables efficient message sending and receiving even in areas with unstable signals or limited bandwidth, making it easier to send and receive messages where internet connectivity is challenging.
AI-Driven Well-being
& Rich Communication Experience
-
GenAI Companions & Enhanced Reasoning: Our proprietary AI, with strengthened reasoning capabilities and unique personalities, provides intelligent companions. These virtual dialogue partners contribute to user mental health by alleviating feelings of alienation and loneliness, even in geographically risky or isolated environments. This supports well-being and helps sustain the ability to continue important activities in extreme conditions.
-
Personalized Experience & Positive Environment: AI analyzes communication patterns to offer tailored content suggestions and optimize the overall app experience. Smart moderation filters out spam, harmful content, and online harassment, fostering a positive and safe user environment.
-
Vibrant Emo Features & Engaging Interaction: Express yourself fully with Arc's unique emotional icons (Emo), a vast array of GIFs, and fun interactions with our unique original characters. This provides entertainment for users to share positive emotions and maintain mental richness, even in difficult circumstances.
Advanced Information Lifecycle Management
-
Flexible Time Disappearance Settings: Messages can be set to disappear automatically after a specified time. By default, messages begin to disappear 24 hours after the app comes online, subsequent to the initial 24-hour mark. Users can pre-set the disappearance period for up to 7 days. Furthermore, by pressing a "4-week save" button, the time disappearance can be set for 4 weeks from the message's send time.
-
Thorough Risk Reduction for Data Residue: This feature significantly reduces the risk of sensitive information remaining unnecessarily, preventing accidental leaks or misuse, especially for highly confidential exchanges. It ensures thorough lifecycle management of information.
-
Time-Limited Group Chats & Events: In addition to individual messages, you can now create entire group chats that automatically disappear after a pre-set period. This feature is ideal for temporary events or projects, ensuring that conversations remain focused and that all data is permanently erased upon completion, perfectly aligning with our data lifecycle management philosophy.
Aiming to be the World's Most Advanced
Defense Tech Messaging App
Beyond everyday communication, Arc's unique blend of security, connectivity, and well-being features positions it as an indispensable communication tool in critical situations.
We aim to be the world's most advanced messaging app in this domain, supporting individuals and teams to maintain secure, private, and emotionally supported connections, even during disasters, emergencies, or in regions facing geopolitical risks and conflicts, when traditional infrastructure fails.
Join us in shaping the future of communication.