Kontalk

Spec sheet

Product

Kontalk is a community-driven instant messaging network designed for smartphones and tablets.Read 11 Oct 2026 · kontalk.net

Platforms

The network site says Kontalk is available for Android and desktop.Read 11 Oct 2026 · kontalk.net

Support

The project links users to a help wiki and a community forum for discussion.Read 11 Oct 2026 · github.com

Cost

The site says Kontalk will always remain free because it relies on volunteer-run servers.Read 11 Oct 2026 · kontalk.org

Encryption

The site says client-to-server and server-to-server channels are fully encrypted, and servers cannot decrypt end-to-end encrypted messages.Read 11 Oct 2026 · kontalk.org

Identity

Kontalk uses a phone number to identify users among their contacts, without requiring user IDs or usernames.Read 11 Oct 2026 · kontalk.org

Open source

The site says all software used in the network, including both server and client software, is open source.Read 11 Oct 2026 · kontalk.org

Project status

The network site says donations are suspended and the project is in its end-of-life period; it said the service would probably shut down before the end of 2024.Read 11 Oct 2026 · kontalk.net

Protocol

Kontalk is based on XMPP and the site says this supports interoperability with other services.Read 11 Oct 2026 · kontalk.org

Registration

The network site says JMP hosts a registration provider for Kontalk.Read 11 Oct 2026 · kontalk.net

Plans and prices

Every Kontalk plan and price →

Where Specifiction places it

• Encrypted Messaging Apps#34 of 437.2
• Secure Messaging Apps#31 of 367.3