SOFTWARE LICENSE GUIDE
Signal
Signal is an open-source encrypted messaging application focused on privacy and security, offering free personal and business communications.
What it does
It provides end-to-end encrypted messaging, voice calls, and video calls, ensuring that only the sender and recipient can read or hear the messages. It also supports group chats and file sharing.
Who it may suit
Individuals and businesses prioritizing privacy and security in their digital communications, seeking an end-to-end encrypted messaging solution.
Free tier and license
Fully featured and free for all personal and business communications.
Limitations to check
No inherent functional limitations based on its open-source licensing. Users should check official documentation for specific technical constraints or community support models.
Licensing notes
Signal's client applications are licensed under GPLv3, while the server components are licensed under AGPLv3. Both are strong copyleft licenses that ensure the software remains free and open-source. Users should consult the official license texts for full details.
Verification details
Last licensing verification recorded: 2026-10-28.
Directory record last updated: 2026-08-18. These are separate dates: a record update does not necessarily mean the publisher's terms changed.
AI-assisted summaries may be incomplete or outdated. Confirm licensing, pricing, and commercial-use rights in the official sources before making a business decision.
Frequently asked questions
Can Signal be used for business communications?
Yes, Signal is free for both personal and business communications, offering end-to-end encryption for privacy.
What makes Signal secure?
Signal uses end-to-end encryption for all communications, meaning messages and calls are encrypted on the sender's device and decrypted only on the recipient's device.
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