Lumicall

At a glance

• Editor score
  6.9 / 10
• Pricing
  Free plan
• Best for
  SIP users wanting a free encrypted Android client
• Free plan
  Yes
• Paid from
  Free
• Facts checked
  13 Oct 2026

• Where it wins

  • ZRTP, SRTP, and TLS support for SIP calling
  • Works with Asterisk, FreeSWITCH, Kamailio, and repro
  • Free app with source code published under the GNU General Public License

• Where it doesn't

  • Android app focus; browser calling is a separate service
  • Requires a compatible SIP account configured with an address and password
  • No confirmed video calling or group-call support

Our verdict on Lumicall

Lumicall is a free Android app for internet phone calls over SIP, aimed at individuals and small organizations that already have a compatible SIP service. It can call other apps and corporate telephone systems, with account setup using a SIP address and password. The project publishes source code under the GNU General Public License, and distributes the app through F-Droid, Google Play, and direct APK download. A separate browser-based calling service is described on its website, but Lumicall itself is primarily an Android client.

Encryption options are central to the app's appeal. Lumicall supports ZRTP, which provides end-to-end encryption when both callers support it and displays a short authentication string for comparison. It also supports SRTP and TLS, alongside ICE NAT traversal. These capabilities suit SIP users who want encrypted calling options and can coordinate compatible settings with their calling counterpart or SIP provider. The published feature set centers on voice calls; buyers seeking video calling or group calls should consider another product.

Its ecosystem fit is practical for users of Asterisk, FreeSWITCH, Kamailio, and repro, but Lumicall depends on an existing compatible SIP service rather than replacing that infrastructure. The website describes a separate browser calling service, so web use should not be treated as the same Android app experience. Community is the listed support channel, and the project’s current development activity is unclear from the available published information. Choose Lumicall for a free, open-source Android SIP client when its supported calling and encryption modes fit; look elsewhere if you need broader collaboration features or a clearly maintained commercial support path.

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Lumicall pricing

Lumicall fact sheet

Lumicall integrations

Lumicall lists 4 integrations on its own site.

• Asterisk
• FreeSWITCH
• Kamailio
• repro

Alternatives to Lumicall

• SignalFree encrypted calls and messaging, with optional paid encrypted media backups.9.4
• ThreemaA paid, multi-device app for private calls, messaging, and encrypted backups.9.2
• WireA secure team workspace with encrypted calls, guest access, and managed enterprise options.9.1

See all Lumicall alternatives →

Featured on iTechGuides

Lumicall is listed in our Encrypted Calling Apps directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 21 Oct 2026 · How we research and update