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Open Source

Signal

A free, open-source encrypted messaging app.

⊞Windows⌘macOS◎Linux◉iOS◈Android

Basic Info

PricingFree
PlatformsWindows, macOS, Linux, iOS, Android
CategoriesProductivity
Open SourceYes
Offline SupportYes
Account RequiredYes
Free TrialNo
Last Checked2026-05-22

Ownership & Dependency

Ownership

HIGH

Cloud Dependency

LOW

Last Checked

2026-05-22

Best For

Privacy-conscious usersTeams needing secure communication

Replaces

Slack

$7.25/month

View alternatives

Pros

  • +End-to-end encrypted
  • +Open source
  • +Free
  • +Non-profit

Cons

  • −Smaller user base
  • −Fewer features than Slack
  • −Phone number required
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