Top ITFirms – Result of In-depth Research & Analysis

5 Best Free and Open Source VoIP Software

Here’s a list of most prevalent VoIP software that are free and open source. This list is illustrative and scalable!

Voice over internet protocol (VoIP) is a technology that enables users to make phone calls via internet routing. It essentially uses data-driven devices like compatible desk phones. VoIP calling apps that are assigned with an IP address can initiate the call from their network. Voice over IP converts voice into a digital signal, compresses it and sends it over the internet. When the “call” connects in-between all the participants – sender and receiver, the digital data is then uncompressed into the sound that users hear through their speakerphone or handset. They are capable of high-definition (HD) phone calls. VoIP software may work across hard-phones and softphones.

What do you need to consider?

Users need to consider features, functionality, third-party integration, customer support, security measures, call encryption, services in case of a security issue, pro-activeness about security updates, emergency support services etc.

Best Free and Open Source VoIP Software.

This list is comparable to Google Voice – a virtual telephone service that offers voicemail, text and voice messaging, call forwarding and call termination facility for customers having Google Accounts. Google Voice has some limitations – not enabling emergency calls with seven digits, which is why we can use these VOIP alternatives. This tool also has a complicated multimedia messaging feature.


Asterisk telephony solution offers a rich and flexible feature set with PBX functionality, interoperability with traditional standards-based telephony systems and voice over IP systems, large-high end-high cost proprietary PBX’s.

Best For: This telephony solution enables businesses to manage activities across public switched telephone networks (PSTN), voice over internet protocol (VoIP) networks etc.

Price: Metered SIP trunking for $0.02/minute and Channelized SIP trunking for $22.95

Main Features of Asterisk


SipXcom is one of the best VoIP software for communication that provides a highly available SIP routing core integrated with the communications services suite. It is based on SIP open architecture, utilizes native SIP protocols, and is highly scalable and perfect for mid-large enterprise environments.

Best For: Augmenting existing PBX, supports endpoints, clients, gateways, SBCs, network services and applications.

Price: A public cloud installation for demo and testing comes for $20/month. And domain comes for $1/annum.

Main Features of SipXcom


It is an open-source instant messaging, voice-video over IP phone to communicate over the internet via voice, video and text messaging. It is available for Chrome, Edge, Firefox and Safari browsers. It is a high-level open-source library that integrates all the SIP voice/video and instant messaging features into every single easy-to-use API.

Best For: Interoperability with most PBX’s and SIP servers as it follows open standards from the telecommunications industry (SIP, RTP) that includes its Flexisip server and is used with any SIP VoIP operator.

Price: Pricing is available on request. Support is available via phone, email and documentation.

Main Features of Linphone


Jitsi is a free and open-source multiplatform voice and video conferencing solution for the web, Windows, Linux, macOS, Android, iOS.

Best For: Security, scalability, ease of use, customization, rich feature set and everyday use

Price: Jitsi rates 5/5 on ease of use, value for money, customer support and functionality. Price is available upon request.

Main Features of Jitsi


Skype is one of the most used open-source VoIP software. It specializes in providing video and voice calls between mobile devices, computers, Xbox one console, smart-watches over the internet. It offers instant messaging services, transmits text, video, images and audio.

Best For: It is for instant messaging, group video conferencing, video chat, file sharing, group chat, screen sharing and make free video and voice one-to-one and group calls.

Price: Skype is usually free. But users may use it to call someone’s cell phone or landline in the US. The monthly subscription starts at $2.99/month.

Main Features of Skype

Towards The End: How to select the best VoIP software?

Users can best use the VoIP software for messaging, automated video support, call recording, caller ID, conferencing, call transfer, on-hold music and file/screen sharing. This list can include many more VOIP software and include SolarWinds VoIP & Network Quality Manager, CloudTalk, 3CX Windows VoIP Phone, ZoiPer, 8*8, Skype, TeamSpeak, SiPMobileTwinkle and Viber. These are equally prevalent across demographics.

Exit mobile version