Harmony

At a glance

• Editor score
  3.8 / 10
• Pricing
  Free plan
• Best for
  Desktop users wanting peer-to-peer encrypted group chat
• Free plan
  Yes
• Paid from
  None
• Facts checked
  3 Oct 2026

• Where it wins

  • Connects peers directly without a central message server.
  • Encrypted group text channels can buffer messages for offline peers.
  • Includes file attachments and two-party voice calls.

• Where it doesn't

  • Desktop apps only; no mobile platform is listed.
  • The working prototype has not had an adversarial security review.
  • Developers caution against relying on it for sensitive communications.

Our verdict on Harmony

Harmony is a free, open-source desktop chat application for people who want peer-to-peer messaging rather than a hosted message server. Its group text channels are end-to-end encrypted, and it also supports signed profiles and avatars, file attachments, per-member presence, and two-party voice calls. Desktop builds are available for Windows, macOS, and Linux. It is described as a working prototype in active development, so it is a better fit for desktop users exploring this model than for people seeking a mature everyday replacement across devices.

Its defining feature is direct peer connection without a central message server. Online peers can buffer encrypted messages for offline members, which gives group text some continuity when participants are not connected at the same time. Passkey-unlocked identity and signed profiles are also part of the feature set. The stated call support is two-party voice, not video, so people who need video calls or broader calling features should look elsewhere. Harmony has a focused feature set around peer-to-peer chat rather than a broad communications suite.

The main limitation is its security posture: the developers describe Harmony as unaudited and caution against relying on it for sensitive communications. That caveat matters more than the appeal of encryption for anyone evaluating it for confidential conversations. Its desktop-only availability also rules it out for users who need mobile messaging. Choose Harmony if you want to explore free, open-source encrypted group chat on Windows, macOS, or Linux and can accept prototype status; choose another option if audited security, mobile access, or video calling is essential.

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Harmony pricing

Harmony fact sheet

Alternatives to Harmony

• SignalA capable free messenger with default encryption and optional paid media backups.9.3
• TelegramA broad messaging app for communities, with end-to-end encryption confined to Secret Chats.9.1
• ElementAn open, encrypted messaging choice for groups that want control over deployment and data.8.9

See all Harmony alternatives →

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 20 Oct 2026 · How we research and update