Signal 8.27.0

Signal Messenger LLC ❘ 261.9MB ❘ Open Source ❘
Android iOS Windows Mac
out of 719435 votes ❘
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<h3>Signal: private messaging with strong encryption and minimal tracking</h3>

<p>Signal is a cross-platform messaging app developed by a nonprofit foundation that emphasizes privacy, security, and a streamlined user experience. It uses the open-source Signal Protocol to deliver end-to-end encryption for one-to-one and group conversations, voice and video calls, attachments, and other message content, while deliberately limiting the metadata retained on its servers.</p>

<h3>Security and privacy features</h3>

<ul>
  <li>End-to-end encryption for messages, voice and video calls, attachments, and group conversations, implemented via the open-source Signal Protocol.</li>
  <li>Minimal metadata collection: account information stored on servers is intentionally limited to reduce the surface for correlation or exposure.</li>
  <li>Registration lock and optional PIN to protect profile settings and prevent unauthorized re-registration of a phone number.</li>
  <li>Ephemeral options including configurable disappearing messages and view-once media for time-limited content.</li>
  <li>Platform-dependent options for preserving conversations when moving devices, including encrypted local backups and secure transfer mechanisms.</li>
  <li>Contact discovery designed to avoid uploading address books in the clear, using privacy-preserving techniques to match contacts without broadly exposing contact lists.</li>
</ul>

<h3>Calling, chat, and group capabilities</h3>

<ul>
  <li>Encrypted voice and video calls for individual and group conversations, using the devices data connection rather than SMS/MMS.</li>
  <li>Rich messaging features including text, voice notes, photos, videos, documents, GIFs, and location sharing, all covered by the same encryption protections.</li>
  <li>Group chats with member and admin controls, threaded replies, reactions, mentions, and invite links to facilitate coordination while maintaining privacy defaults.</li>
</ul>

<h3>Design, usability, and platform support</h3>

<ul>
  <li>Clean, minimal interface across mobile and desktop clients—Android, iOS, Windows, macOS, and Linux—with secure synchronization between linked devices.</li>
  <li>Lightweight behavior over cellular and Wi-Fi connections, relying on the devices internet link to send messages and place calls.</li>
  <li>Accessibility and customization options such as adjustable message font size, dark mode, and granular notification controls.</li>
  <li>Open-source codebase available for inspection and contribution, supporting transparency and third-party auditing.</li>
</ul>

<h3>Support, governance, and funding</h3>

<ul>
  <li>Operated by a nonprofit organization and funded through grants and donations rather than advertising or data monetization.</li>
  <li>Official help resources and documentation cover installation, privacy features, account management, and troubleshooting.</li>
  <li>Ongoing development with regular updates that address security and usability, informed by community and independent input.</li>
</ul>

<h3>Practical use cases</h3>

<ul>
  <li>Individuals seeking encrypted, advertising-free messaging and calling with minimal data collection.</li>
  <li>Professionals and others who require communication with reduced metadata exposure for sensitive discussions.</li>
  <li>General users who want a straightforward messaging app with cross-device support and privacy-focused defaults.</li>
</ul>

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2,702 users of UpdateStar had Signal installed last month.

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8.27.0

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