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Asterisk
Based on GetApp‘s extensive, proprietary database of in-depth, verified user reviews
Open-source modular communication system
Table of Contents
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Asterisk - 2026 Pricing, Features, Reviews & Alternatives
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Last updated: December 2025
Asterisk overview
What is Asterisk?
Asterisk by Digium is an open source communications tool that provides voice and video communication solutions for small, mid-size and large organizations across the globe. The software is freely available and can connect seamlessly with legacy communication systems and VoIP. Asterisk includes many pre-built components that have the capability to handle simple as well as complex voice, video and text communications.
Asterisk telephony solutions provide both classical PBX functionality as well as advanced features including call recording, call routing, call snooping, call waiting, caller ID blocking, blacklists, authentication and conference bridging. Other features offered by Asterisk include SMS messaging, trunking, transcoding, text-to-speech conversion, interactive voice response, flexible extension logic and overhead paging. The software is scalable, allows for the integration of physically separate installations and supports a unified dialplan across offices located in multiple locations. The tool follows both VoIP protocols such as UNIStim, Google Talk, IAX, Jingle/XMPP, SIP, MGCP, and SCCP as well as traditional telephony protocols such as FXS, FXO, Loopstart, Kewlstart, E&M, and others.
Asterisk has a modular design and includes several different components that can be combined to build unified communication solutions including VoIP gateways, phone systems, voicemail servers, conference bridges and IVR servers. Over 1,000 companies in 170 countries use Digium’s phone systems including Yahoo, University of Pennsylvania, Google, U.S. Army, eBay and many of the Fortune 1000 companies.
Key benefits of using Asterisk
? The tool offers features such as call recording, call forwarding, call routing, blacklists, call queuing, call waiting, caller ID, calling cards and blind transfer.
? The product can be used to build a complete phone system, to bridge gaps between systems or to extend or enhance an existing system.
? Asterisk is flexible and lets users define the solution that truly fits their requirements and is stable as well as reliable.
? The system supports both classical PBX functionality as well as advanced features that are associated with large, high-end proprietary PBXs and inter-operates both with traditional telephony systems and VoIP systems.
Starting price
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Pros & Cons
Pricing
Customer Support
Integrations
Security and Access Control
User Interface
Asterisk’s user interface
Asterisk pros, cons and reviews insights
To determine these pros and cons insights, we analyzed responses from
Overall rating
Value for money
4.8
Features
4.6
Ease of use
3.5
Customer support
3.4
Reviews sentiment
What do users say about Asterisk?
We have around 300 phones deployed with Asterisk / FreePBX and when comparing the costs against industry leading phone solutions we are saving tens of thousands of pounds per year.
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Who uses Asterisk?
Based on 44 verified user reviews.
Company size
Small Businesses
Enterprises
Midsize Businesses
Top industries
Use cases
Asterisk's key features
Most critical features, based on insights from Asterisk users:
All Asterisk features
Features rating:
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Asterisk pricing
Value for money rating:
Starting from
595
User opinions about Asterisk price and value
Value for money rating:
To see what individual users think of Asterisk's price and value, check out the review snippets below.
Verified reviewer
Anonymity request
Wobe M.
Network and Systems Administrator
Asterisk integrations (45)
Asterisk support options
Typical customers
Platforms supported
Support options
Training options
Asterisk FAQs
Asterisk has the following typical customers:
Large Enterprises, Mid Size Business, Public Administrations, Small Business
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Q. What languages does Asterisk support?
Asterisk supports the following languages:
English
Q. Does Asterisk support mobile devices?
Asterisk supports the following devices:
Android, iPad, iPhone
Q. Does Asterisk offer an API?
Yes, Asterisk has an API available for use.
Q. What level of support does Asterisk offer?
Asterisk offers the following support options:
Knowledge Base, Email/Help Desk, Chat, 24/7 (Live rep), FAQs/Forum, Phone Support
