SimpleX Chat provides a private and secure messaging application built on a decentralized network architecture. This platform ensures users own their identity, contacts, and groups, eliminating reliance on centralized servers for communication. The service features end-to-end encryption where servers cannot see message content or contact graphs, enhancing user privacy.
Funding
$1.3M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
JDFounders
Product
Problem
Existing messaging platforms rely on user identifiers, such as phone numbers or usernames, which can expose metadata and compromise user privacy. This reliance creates vulnerabilities to correlation attacks and limits anonymity.
Solution
SimpleX Chat is a messaging platform that eliminates user identifiers, enhancing metadata privacy and preventing correlation attacks. It uses temporary pairwise anonymous identifiers for message queues, ensuring that each connection has separate identifiers. The platform employs a two-layer end-to-end encryption to secure message delivery without exposing user connections or profiles to servers or observers. SimpleX Chat's design ensures that user profiles, contacts, and groups are stored only on client devices, with messages temporarily held on relay servers until received, after which they are permanently deleted.
Target Audience
The primary target audience includes individuals and organizations prioritizing privacy and security in their communications, as well as those seeking protection from metadata exposure and correlation attacks.
Features
- No user identifiers of any kind, not even random numbers
- Temporary anonymous pairwise identifiers for message queues
- Two-layer end-to-end encryption using double-ratchet protocol and NaCL cryptobox
- Message integrity verification through sequential numbering and hashing
- Content padding to prevent message size attacks
- Decentralized network with independent relay servers
- Optional Tor access for IP address protection
- Portable encrypted app storage for transferring profiles to other devices
- Incognito mode with unique display names for each contact
- Disappearing messages with opt-out options
- End-to-end encrypted audio and video calls
- Connection security code verification to protect from man-in-the-middle attacks