Asterisk

6.9easy start · #5 of 20
in Interactive Voice Response Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you worknot on record

Runs on api, Linux, self-hosted.

Asterisk is ranked #5 of 20 in interactive voice response software on The Geeks Club. It runs on API, Linux, Self-hosted. There is a free plan.

Asterisk plans and pricing

All plans

Asterisk Free Free and open source · GPLv2 · download free of charge asterisk.org · 4 Oct 2026

Compared on interactive voice response software

Free plan: Yes

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The record

Purpose: Asterisk is an open source framework for building communications applications and turns an ordinary computer into a communications server.
Use cases: Asterisk powers IP PBX systems, VoIP gateways, conference servers, call centers, voicemail servers and IVR systems.
Features: Its listed features include call routing, recording, queuing, conferencing, voicemail, IVR, automated attendants and call transfers.
Interfaces: Computer-telephony interfaces include AGI, AMI and the Asterisk REST Interface (ARI).
Protocols: Listed VoIP protocols include SIP, H.323, IAX, Jingle/XMPP, MGCP and SCCP.
Integrations: The site says Asterisk can connect communications to applications, including Salesforce automation or CRM systems using AMI.
Deployment: Asterisk can be downloaded as source code, and the site points users to install it on a modern cloud Linux instance.
Linux requirement: The site says building applications with Asterisk requires working knowledge of Linux, scripting, networking and telephony.
Licensing: Asterisk is distributed under GPLv2 and Sangoma offers commercial licensing for uses that are incompatible with GPLv2.
Support: Sangoma offers five support levels for core components of current open source Asterisk versions, with Level 5 reserved for customers requiring an SLA and engineering support.
Community help: The Asterisk forum offers community help and feedback on installation, upgrading and running Asterisk.
Notable limitation: MFC-R2 is listed as not supported, although the page says a patch is available.
Sponsor: Asterisk is sponsored by Sangoma.
Founded: 1999
Price from: Free

Where it ranks on The Geeks Club

Best Interactive Voice Response Software in 2026#5 of 20

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Sources

asterisk.org/get-started/· checked 4 Oct 2026
asterisk.org/get-started/applications/· checked 4 Oct 2026
asterisk.org/get-started/features/· checked 4 Oct 2026
asterisk.org/downloads/· checked 4 Oct 2026
asterisk.org/products/software/licensing/· checked 4 Oct 2026
asterisk.org/support/· checked 4 Oct 2026
asterisk.org· checked 4 Oct 2026
asterisk.org/products/software/· checked 4 Oct 2026