Asterisk

OPEN SRC

Easy to use but advanced IP PBX system, VoIP gateway and conference server

► Small to medium businesses seeking customizable VoIP solutions

VG SCORE

8.5

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Product Details

PricingOpen Source

API✅ REST + GraphQL

Learning CurveSteep

Integrations13 available

■ INTELLIGENCE BRIEFING — Weekly tool drops. No spam.

PROS & CONS

STRENGTHS

Incredibly flexible and customizable for nearly any telephony need.
Proven, stable platform trusted by businesses and developers worldwide.
Completely free and open-source with a massive, active community.

WEAKNESSES

−Requires significant technical expertise to configure and maintain effectively.
−Can have a steep learning curve compared to turnkey, proprietary PBX solutions.

KEY FEATURES

Open-Source Core

Free, modifiable software foundation for building communication systems.

Extensive Protocol Support

Works with SIP, IAX, H.323, and more for maximum compatibility.

VoIP Gateway

Bridges calls between different network types and protocols.

Conference Server

Hosts multi-party audio conferences with various features.

WHO IS Asterisk BEST FOR?

Small to medium businesses (SMBs)

They need a cost-effective, customizable phone system to replace traditional PBX hardware and manage calls, voicemail, and basic call routing.

Small to medium businesses

They need a cost-effective, customizable phone system for call routing, voicemail, and conferencing without vendor lock-in.

INTEGRATIONS

ISDN/PSTN gatewaysDatabasesLDAP/Active DirectorySpeech recognition enginesMonitoring tools (e.g., Nagios)SIP phonesCustom scriptsDatabases (e.g., MySQL, PostgreSQL)RESTful applicationsCRM systemsCustom applications via AGI/AMICRM systems (e.g., Salesforce, SugarCRM)VoIP providers