Asterisk vs Kamailio

Asterisk — Asterisk is an open source communications software that allows you to build telephony applications and services. It supports voice over IP, video conferencing, voicemail, auto attendant, interactive v

Kamailio — Kamailio is an open source SIP server used for VoIP and real-time communications. It handles call routing, policy enforcement, media handling, accounting, and authorization with support for presence a

Asterisk offers PBX functionality, VoIP, Interactive voice response, Voicemail, Conference calling, while Kamailio provides SIP proxy and registrar server, Presence and instant messaging, Load balancing and failover, NAT traversal, Media relaying.

Asterisk stands out for Open source and free, Highly customizable, Supports many protocols and codecs; Kamailio is known for Open source and free, Highly scalable and performant, Rich feature set for VoIP.

Feature	Asterisk	Kamailio
Overall Score	N/A	N/A
Primary Category	Network & Admin	Social & Communications
Pricing	Open Source	Open Source

Product Overview

Asterisk

Description: Asterisk is an open source communications software that allows you to build telephony applications and services. It supports voice over IP, video conferencing, voicemail, auto attendant, interactive voice response, and more. It can be used to build PBX systems, call center solutions, and other communications platforms.

Kamailio

Description: Kamailio is an open source SIP server used for VoIP and real-time communications. It handles call routing, policy enforcement, media handling, accounting, and authorization with support for presence and instant messaging.

Key Features Comparison

Asterisk Features

• PBX functionality
• VoIP
• Interactive voice response
• Voicemail
• Conference calling
• Call routing
• Call queuing

Kamailio Features

• SIP proxy and registrar server
• Presence and instant messaging
• Load balancing and failover
• NAT traversal
• Media relaying
• Accounting and billing
• Flexible routing and policy enforcement
• Modular architecture with extensive API

Pros & Cons Analysis

Asterisk

Pros

• Open source and free
• Highly customizable
• Supports many protocols and codecs
• Active development community
• Integrates with many CRM and business software

Cons

• Steep learning curve
• Requires technical expertise to setup and manage
• Limited official support
• Fragmented documentation
• Not as feature rich as proprietary PBX systems

Kamailio

Pros

• Open source and free
• Highly scalable and performant
• Rich feature set for VoIP
• Active community support
• Modular and customizable
• Supports wide range of SIP devices and clients

Cons

• Steep learning curve
• Requires expertise to setup and manage
• Not as user friendly as commercial options
• Limited official support and documentation

Pricing Comparison

Asterisk

• Open Source

Kamailio

• Open Source