VG
VENTUREGAPS
■ FEATURE YOUR TOOL HEREADVERTISE →
A

Asterisk

OPEN SRC

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

VG SCORE
9.0
VIEW ALTERNATIVES

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

TECHNICAL DETAILS

LEARNING CURVE
STEEP — SIGNIFICANT ONBOARDING
API

✓ REST + GRAPHQL

FIELD REPORTS (0)

No field reports yet. Be the first to review Asterisk.

DOSSIER

LAST VERIFIED MAR 23, 2026
VISIT WEBSITE

FILED UNDER

Developer ToolsOpen Source

ALTERNATIVES

Courier MTA8.5/10
ALL ALTERNATIVES

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

PRICING MODEL

open source

BEST FOR

Small to medium businesses (SMBs) Small to medium businesses

FEATURES

Has API

FINAL ASSESSMENT

APPROVED — WORTH YOUR MONEY

RELATED FILES

Similar tools in the same category

P

PdfDing

OPEN SRC

PDF manager, viewer and editor offering a seamless user experience on multiple devices. It's designed to be minimal, fast, and easy to set up using Docker.

APPROVED
S

SeedDMS

OPEN SRC

Document Management System with workflows, access rights, fulltext search, and more

APPROVED
A

Atsumeru

OPEN SRC

Manga/comic/light novel media server with clients for Windows, Linux, macOS and Android

APPROVED
C

Calibre

OPEN SRC

E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients

APPROVED