Skip to content
SPECIFICTION
Get listed

Kannel

kannel.org

Free plan LinuxAPISelf-hosted
Visit kannel.org
Spec score 8.1 #19 of 36 in SMS Gateway Software

Spec sheet

Product
Kannel is an open-source WAP and SMS gateway for mobile internet connectivity, WAP Push, and SMS messaging.Read 7 Oct 2026 · kannel.org
Free plan
YesRead 24 Sep 2026 · kannel.org
Security
The user guide documents SSL support for HTTP client and server communication, and SSL-enabled SMPP connections.Read 7 Oct 2026 · kannel.org
Support
The project directs users to its mailing lists for contact information and the developer mailing list for development discussion and patches.Read 7 Oct 2026 · kannel.com
License
The Kannel Software License permits redistribution and modification of source and binary forms subject to its stated conditions.Read 7 Oct 2026 · kannel.org
Founded
1999Read 28 Sep 2026 · kannel.org
Download
The download page identifies version 1.4.5 as the stable release intended for production systems and version 1.5.0 as the development release.Read 7 Oct 2026 · kannel.org
Inbound webhooks
YesRead 24 Sep 2026 · kannel.org
Integration
Kannel provides an HTTP interface for administration and sending SMS, and its guide documents HTTP and SMPP SMSC connections.Read 7 Oct 2026 · kannel.org
Messaging
The user guide describes support for mobile-originated and mobile-terminated SMS messages.Read 7 Oct 2026 · kannel.org
Platform
Kannel is mainly developed on Linux and the overview says it should be fairly easy to port to other Unix-like systems.Read 7 Oct 2026 · kannel.org
Project history
The project site says Wapit Ltd. founded Kannel in June 1999 and that the project is coordinated by members of the Kannel Group.Read 7 Oct 2026 · kannel.com
SMS protocols
The FAQ lists support for CIMD 1.3 and 2.0, SMPP 3.4, UCP/EMI 4.0, SEMA SMS2000 OIS, and AT-protocol modems and phones.Read 7 Oct 2026 · kannel.org
SMS use
It links HTTP-based services to SMS centers and provides a unified interface for sending SMS messages.Read 7 Oct 2026 · kannel.org
SMSC limits
The user guide cautions that SMSC drivers do not all support the same features and that many checklist entries are marked not tested.Read 7 Oct 2026 · kannel.org
Two-way SMS
YesRead 24 Sep 2026 · kannel.org
WAP features
The gateway translates WAP requests to HTTP and compresses WML pages for delivery to phones.Read 7 Oct 2026 · kannel.org
WAP Push
The user guide lists support for WAP Push SI and SL.Read 7 Oct 2026 · kannel.org

Plans and prices

Kannel Free Open-source WAP and SMS gateway · self-hosted Read 7 Oct 2026 · kannel.org

Every Kannel plan and price →

Where Specifiction places it

Alternatives to KannelAll alternatives →