Vetted Score
4.6
/ 5.0
Awarded 4.6/5 for its robust feature set, strong community, and enterprise‑grade scalability while remaining free.
Key Features
Highly Flexible PBX Engine
Provides call routing, voicemail, conferencing, and IVR with extensive dialplan scripting.
Broad Protocol Support
Native support for SIP, IAX, H.323, and many other telephony protocols.
Scalable Architecture
Runs on a single server or scales across clusters to handle thousands of concurrent calls.
Frequently Asked Questions
Yes, Asterisk is released under the GPL and can be used free of charge in commercial environments.
Asterisk runs natively on Linux and can be installed on macOS and Windows (via Cygwin or WSL).
Commercial support and add‑on modules are offered by third‑party vendors and the Digium/Sangoma ecosystem.
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Specifications
Pricing Model
Free and open-source; optional commercial support and premium modules are available.
Supported Platforms
LinuxmacOSWindows