Signal 8.20.0

Signal Messenger LLC ❘ 261.9MB ❘ Open Source ❘
Android iOS Windows Mac
out of 719435 votes ❘
Rank 4 among competitors

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<h3>Signal editor's review: private messaging with robust encryption and minimal tracking</h3>

<p>Signal is a cross-platform messaging app focused on privacy, security, and a clean user experience. Built and maintained by a nonprofit organization, Signal combines industry-leading end-to-end encryption with practical features for everyday communication: text, voice, video, file sharing, and group collaboration without ad tracking or invasive data collection.</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: Signal deliberately limits the data stored on its servers to protect user privacy.</li>
  <li>Optional registration lock and PIN to protect profile settings and prevent unauthorized re-registration of your phone number.</li>
  <li>Disappearing messages and view-once media for ephemeral communication, with configurable timers per conversation.</li>
  <li>Encrypted backups and secure transfer options to preserve conversations when moving devices (platform options vary by OS), keeping message content inaccessible to third parties.</li>
  <li>Contact discovery that uses privacy-preserving techniques to match contacts without uploading plain phonebooks to servers.</li>
</ul>

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

<ul>
  <li>High-quality encrypted voice and video calls with low latency, including one-to-one and group calls that scale to dozens of participants for team conversations or family catch-ups.</li>
  <li>Rich messaging: send text, voice notes, photos, videos, GIFs, documents, and location with the same encryption guarantees as standard chats.</li>
  <li>Group chats that support large memberships with admin controls for posting and member management, and subject to evolving limits set by the app.</li>
  <li>Threaded replies, reactions, mentions, and group links to make coordination easier while maintaining privacy safeguards.</li>
</ul>

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

<ul>
  <li>Clean, intuitive interface across mobile and desktop clients—Android, iOS, Windows, macOS, and Linux—synchronizing messages securely between linked devices.</li>
  <li>Lightweight performance that works over cellular or Wi‑Fi, using your device’s data connection to avoid SMS/MMS fees.</li>
  <li>Accessibility and customization options, including message font sizing, dark mode, and notification controls for granular user preferences.</li>
  <li>Open-source codebase available for audit and contribution, reinforcing transparency and community trust.</li>
</ul>

<h3>Support, governance, and business model</h3>

<ul>
  <li>Operated by a nonprofit foundation and funded through grants and donations rather than advertising or data monetization.</li>
  <li>Comprehensive help resources and user documentation for troubleshooting, privacy features, and account management maintained by the official support site.</li>
  <li>Active development with regular security updates and feature improvements driven by community feedback and independent review.</li>
</ul>

<h3>Who should use Signal</h3>

<ul>
  <li>Users who prioritize private, encrypted communication without ads or commercial tracking.</li>
  <li>Journalists, activists, and professionals who need reliable confidentiality and minimal metadata exposure.</li>
  <li>Everyday users who want a fast, simple messaging app with robust privacy defaults and cross-device support.</li>
</ul>

<p>Signal delivers a privacy-first messaging experience with strong encryption, transparent development, and practical features for modern communication across devices.

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2,419 users of UpdateStar had Signal installed last month.

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