Is Signal a secure alternative to Teams and Zoom?

Apr 28, 2025
Almost unnoticed, Signal has become a powerful video conferencing tool in recent years. The maximum number of participants in video calls has now been increased to 50, and for some time now, Signal’s desktop client has been able to share the entire screen or individual windows for presentations.

But 2024 brought another significant boost to Signal’s video conferencing features, making the encrypted messenger a fully-fledged and, above all, secure alternative to Microsoft Teams and Zoom as the following table shows.

Video conferencing features compared

Complete end-to-end encryption by default
Chat feature
Screen sharing
Call links
"Raise hand" feature
Emoji reactions
Desktop/Android/iOS Client
Maximum participants
Signal
50
Teams
1000
Zoom
100

Signal is now a private and secure alternative to Teams and Zoom

As the comparison table above shows, Signal has caught up with the market leaders Teams and Zoom. This has made Signal a serious, secure alternative in the video conferencing sector, especially for small and medium-sized organizations and companies.

Encryption and security in Signal

This is especially true because Signal offers maximum security with its full end-to-end encryption by default. With Signal, all communication (including calls) is always end-to-end encrypted by default, while many other providers only rely on transport encryption by default, which does not guarantee secure encryption from one endpoint to another.

For encryption Signal uses its own Signal protocol, which is widely regarded as the gold standard in encryption.

At the same time, Signal does not collect metadata and consistently enforces the highest level of data protection and security in all other areas – including quantum-safe encryption.

In times when data leaks and security incidents are becoming increasingly widespread and companies and organizations are making their own data security a top priority, Signal offers a comprehensive set of features to allow professional and secure video conferences and is used by many companies and organizations worldwide.

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