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Messaging

SimpleX Chat

Maximum privacy messaging with no user identifiers and

relay servers

Privacy score 90 Free Technical: Intermediate Open source
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SimpleX Chat offers a privacy-conscious alternative in the messaging space, with a stronger focus on data protection than many mainstream tools.

Android iOS Windows Mac Linux

Who is this for?

✓ Good for you if:

  • • You need the highest level of anonymity (no user IDs at all)
  • • You want to avoid all collection
  • • You need messaging with relay server choice
  • • You want protection against spam (invitation-only messaging)
  • • You need post-quantum resistant

⚠ Think twice if:

  • • You want the simplest messaging experience (requires sharing invitation links)
  • • You need to message people who only use mainstream apps
  • • You want phone number or username-based messaging
  • • You need the largest user base (SimpleX is newer and smaller)
  • • You want automatic contact discovery

Overview

SimpleX Chat is a privacy-focused messaging application that provides end-to-end encryption

without requiring user accounts, phone numbers, or email addresses. The service uses a unique architecture where users connect through temporary anonymous addresses, providing strong anonymity. SimpleX Chat does not use user identifiers, making it difficult to track or correlate users. The service operates on a decentralized network and does not store user data or message content on servers. SimpleX Chat includes features like group messaging, file sharing, voice messages, and disappearing messages. The application is open source and can be self-hosted. SimpleX Chat is free to use and is developed by a community of contributors. The service emphasizes anonymity and privacy, making it suitable for users who want maximum privacy and anonymity in their communications.

Privacy highlight

End-to-end encrypted messaging without user identifiers. No phone numbers or emails required.

, no , strong anonymity.

Quick facts

Country:
🇬🇧 United Kingdom
Pricing:
Free
Platform:
Android, iOS, Windows, Mac, Linux
Technical:
Intermediate
:
Yes
:
No telemetry
:
Yes
Open-source status:
Fully open source
:
No
:
No

Key features

  • End-to-end encrypted messaging
  • Voice and video calls with
  • Group messaging with
  • File sharing with
  • Disappearing messages
  • Username support (phone number privacy)
Security & encryption Click to expand
Yes
Encryption protocols
Double Ratchet Algorithm
SimpleX Chat uses with keys generated and stored on user devices. The service uses a unique architecture where keys are managed locally and never transmitted to servers. SimpleX Chat does not have access to keys as they never leave user devices. The service uses secure key exchange protocols to establish encrypted sessions. SimpleX Chat supports secure and recovery through encrypted stored on user devices. When self-hosted, users have complete control over .
Offline support
No
Telemetry & tracking Click to expand
No telemetry
No
Ip no
SimpleX Chat does not collect data. The service does not track users, collect usage statistics, or monitor message activity. SimpleX Chat does not log IP addresses and does not use or tools. The application is designed for maximum privacy and anonymity with no . The service uses temporary anonymous addresses, making difficult.
Jurisdiction & compliance Click to expand
SimpleX Chat is open-source software with no central jurisdiction. The service operates on decentralized servers, so data residency depends on server locations. SimpleX Chat does not retain message content on servers, so there is minimal data residency concern. When self-hosted, users have complete control over data residency.
SimpleX Chat does not retain message content on servers. Messages are delivered and then deleted from servers. The service does not retain user data, message content, or . SimpleX Chat does not log IP addresses. Users can delete their accounts and all associated data at any time. When self-hosted, users have complete control over .
Legal frameworks
List applicable frameworks once confirmed (e.g., GDPR, CCPA, LGPD).
Revenue sources
Donations
Editorial signals Click to expand
90
Trust score
92
Trust breakdown (0–10)
Encryption: 95, Audits: 80, Open source: 90, Telemetry: 100, Jurisdiction: 100, Transparency: 90, Trackers: 100
Editorial notes
Usability: 80, Performance: 75, Family friendly: 80
User experience Click to expand
Signup requirements
none
Onboarding difficulty (1-5)
2
Accessibility features
Add technical accessibility details after testing.
Backup & portability Click to expand
No
Migration tools
Describe CLI, export/import, and migration flows after review.
Explain key and account recovery models after research.

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