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What is Kamailio?

Kamailio® is a powerful open-source SIP server that emerged from the earlier versions of OpenSER and SER, and is released under GPLv2+, designed to efficiently handle thousands of call setups per second. This versatile platform is ideal for building large-scale VoIP systems, facilitating real-time communication, managing presence, supporting WebRTC, enabling instant messaging, and accommodating numerous other applications. Moreover, Kamailio excels in scaling SIP-to-PSTN gateways, PBX systems, and media servers, such as Asterisk™, FreeSWITCH™, or SEMS, with remarkable ease. Its rich feature set encompasses support for asynchronous protocols like TCP, UDP, and SCTP, ensuring secure communication through TLS for voice, video, and text, in addition to compatibility with WebSockets for WebRTC. The server also fully supports both IPv4 and IPv6, offers straightforward instant messaging and presence functionalities via an integrated XCAP server and MSRP relay, and facilitates asynchronous operations effortlessly. Additionally, it includes IMS extensions for VoLTE, ENUM capabilities, along with features for DID and least cost routing, load balancing, and routing failover to enhance reliability. Kamailio's comprehensive suite of accounting, authentication, and authorization features ensures robust security, while it seamlessly integrates with a variety of backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra, MongoDB, and Memcached. With all these advanced capabilities, Kamailio stands out as a highly adaptable solution for contemporary communication infrastructures, making it a preferred choice among developers and organizations alike.

What is FreePBX?

The word "Free" in FreePBX embodies the concept of Freedom, underscoring that FreePBX is the foremost open-source IP PBX solution worldwide, which enables users to design a tailored phone system that aligns with their unique needs. Delve into the possibilities of open-source communication and investigate the wide array of features offered by FreePBX that assist in building your perfect phone system. By incorporating commercial modules from Sangoma and a variety of other enhancements, you can transform your FreePBX setup into a robust Unified Communications platform. Remember to consult the Knowledge Base on the FreePBX Wiki for further information! Alternatively, seeking support from FreePBX experts can aid you with installation, updates, troubleshooting, and additional services. FreePBX is accessible for free download and usage, and its strength is bolstered by a global community of developers committed to ensuring its high compatibility and flexibility, which guarantees it encompasses all necessary functionalities required to establish a scalable business phone system for any budget. This community-driven approach not only promotes innovation but also ensures ongoing advancements, solidifying FreePBX as a dependable option for diverse communication requirements. With its extensive resources and community support, users can continually enhance their experience and capabilities.

Media

Media

Integrations Supported

AWS Marketplace
Asterisk
Azure Marketplace
CRMTiger
Coeo
DIDforSale
FlyNumber
Fonimo
FreeSWITCH
GTranscribe
MongoDB
MySQL
Oracle Cloud Infrastructure
PBXDom
PostgreSQL
SIP Caller
SIP.US
Syncro
Telnyx
Wiretap Telecom

Integrations Supported

AWS Marketplace
Asterisk
Azure Marketplace
CRMTiger
Coeo
DIDforSale
FlyNumber
Fonimo
FreeSWITCH
GTranscribe
MongoDB
MySQL
Oracle Cloud Infrastructure
PBXDom
PostgreSQL
SIP Caller
SIP.US
Syncro
Telnyx
Wiretap Telecom

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Kamailio

Date Founded

2001

Company Location

United States

Company Website

www.kamailio.org/w/

Company Facts

Organization Name

Sangoma Technologies

Date Founded

1984

Company Location

Canada

Company Website

www.freepbx.org

Categories and Features

PBX

Telephony

Auto-Dialer
Call Center Management
Call Monitoring
Contact Management
IVR / Voice Recognition
Inbound Reporting
Outbound Reporting
Predictive Dialer
Telemarketing Management
VoIP
Voice & Data Integration

Categories and Features

PBX

Telephony

Auto-Dialer
Call Center Management
Call Monitoring
Contact Management
IVR / Voice Recognition
Inbound Reporting
Outbound Reporting
Predictive Dialer
Telemarketing Management
VoIP
Voice & Data Integration

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