Top 10 Free PBX Solutions – detailed comparison

Which are the top free PBX business solutions

Adopting an existing VOIP service from the top PBX providers will get the job done for most businesses. But no one said it is easy to find the right one. Providers do their best to fit the needs of every business on a case-by-case basis. Nevertheless, with gaps in usage cases, business team sizes, required features or safety, it may be about impossible satisfy everyone. For all those cases where a service won’t fill in the gaps, businesses can turn to open source solutions or platforms. And yes there are open source PBX software solutions out there. With them any business can develop and tailor their own in house PBX applications. Since these platforms are open source, all the source is available for free online, and can be tailored for every specific scenario.


Asterisk is the godfather of all open source PBX and VOIP solutions. And it continues to function as gold standard. It is the leading open source telephony platform, with an enormous feature lists which only continues to grow each year. The Asterisk tool kit is used by a mass quantity of developers around the world. Many of the suppliers on our list have either begun with, or are based completely on the Asterisk project. It is packed with the standard PBX VOIP features. Consisting of automatic telephone, an interactive voice response menu, conference calling, and voicemail. Asterisk makes it easy workable to turn any computer. The program is free and open source. To help get you started, Asterisk provides live web classes, as well as an Asterisk Definitive guide. Asterisk can be considered The Platform when it comes to creating your own VoIP or PBX.


SIP Foundry provides much of the solutions that the Asterisk engine can power. With SIPFoundry you can construct your own voice and video communications. In addition it support conference calls, messaging and chat. Like with Asterisk, the platform includes everything you might need to build your own PBX solution. Nevertheless, whilst Asterisk is 100% free and open source depending on guides. SIPFoundry has a somewhat different spin. It offers professional paid assistance to developers based upon customer needs. While an excess cost to think about, adopting a support team might be a essential step for some businesses looking to build their own system. With a focus on the marketplace, the tool is free for commercial or private use. The project has also brought in features from other open source projects. HylaFAX, FreePBX, Openfire and Postfix.


Elastix intends to bring in Asterisk’s features and other such projects, all under 1 easy-to-use interface. Elastix boasts support for a wide range of hardware consisting of Yeastar, Dinstar, Digium, Yealink and Snom. It was actually 1 of the first distributions that included a call center module. And it proceeds to supply the solutionfree under the GNU General Public License. It’s come to our attention that Elastix appears to provide up to 8 SIM calls for approximately 25 users, since writing this post. FreeSWITCH was also based off the Asterisk platform, and was created and developed by 3 of the original programmers of the Asterisk platform. Anthony Minessale II, Brian West and Michael Jerris.


FreeSWITCH is with a focus on modulator, cross-platform service, availability and stability. It provides 1 of the most flexible platforms to construct your own UC package. FreeSWITCH supports SIP, H.323 as well as WebRTC to leverage the latest advancements in the technology. It can integrate and interface with other some of the other open source PBX platforms. For less complexity FreeSWITCH utilizes open software libraries that preform the essential functions. FreeSWITCH delivers the calling features and some extras such as speech recognition. It even offers PSTN ports for digital and analogue circuits.


Voicetronix is equipment supplier and a solutions that offers an open source platform, but also an assortment of hardware. The do-it-yourself OpenPBX of Voicetronix is a web enabled PBX program. It comes with a web based user management portal, in addition to a management GUI for easy and rapid configuration. It is feature rich with car attendant, automatic call distribution call routing search groups and even voicemail. Unique features like call hunt groups, music on hold and call records are good solution for businesses in need of a basic call center software. With CRM baked and enabled into the platform, users may not require to adopt a separate CRM solution, saving time and money.


PBXInAFlash main feature is the ability set up your own PBX server in no time. The project has everything needed to set up a PBX system in under one hour. It uses CentOS, with integrated Apache web server, SendMail server, and MySQL database. In addition to firewalls and all essential protocols. Users have the option to pick from dozens of add-ons to tailor the system. Backups, Caller ID look up services, SSL keys, Google Voice integration, and fax support to name a few. With the number 1 goal of no bloat and no bugs, PBXInAFlash seems to be easiest and the quickest solution to adopt.


FreePBX combines the best of both worlds, and leverages the work. While the project uses the Asterisk system, users may download either just the GUI to add on to their current system, or the whole package. It consists of a per-configured program OS, Asterisk, and the FreePBX GUI. So while by adopting Asterisk, some knowledge may be required to take advantage of, or to create your own GUI, FreePBX brings it all together. FreePBX makes it feasible to establish your SIP Trunks that are part of the platform thanks to the integration. FreePBX also contains a long list of commercial modules and add-ons to enhance your system with even more features.


With a focus on open source implementation of a SIP server, with OpenSIPs its easy to set up your own PBX. The platform supports video, voice, IM and presence services. It is using modular design, it is scalable, and very much customizable. OpenSIPs enterprise class SIP server solution and a very fast one at that . OpenSIP has made a list of benchmarks and performance tests to back their claim up. Similar to Asterisk, OpenSIPs often records webinars, and makes in depth manuals for configuration. A web interface makes it easy to collect data and shows on the fly configurations.


Kamailio is an open source project with 15 years of constructive development. And while the original company left the project, it continues to expand, both the SIP server and Kamailio project continue to build on. With features like UDP asynchronous TCP and SCTP, TLS to ensure secure communications. VoIP data consisting of voice video and text, and even WebRTC support the hard work can clearly be seen. Kamailio also supports instant messaging, least cost routing, load balancing, routing fail-over. Realizing that security features are important they are offering the strongest level of security on this list. Authentication and authorization for enhanced security as well as the level of encryption that the platform gives makes it a good recommendation for any staff or business that needs to keep everything as locked down and protected as possible. As a result of all that, Kamailio may be a bit more challenging to adopt.


The 3CX Phone System is the last open source PBX based upon the SIP standard on the list. This solution allows extensions to make calls on the PSTN or standard services. The platform also offers an easy to understand web based GUI, and the process to is actually simple – an executable file. 3CX supports iOS and Android for mobile customers, of coarse Windows and Mac softphones are supported too. It appears to take out the hassle of development required to establish your own PBX server. WebRTC adoption makes web conferencing possible. Click2Call and CRM are also part of the features. As most others, internet training academy is readily available for users to understand how to manage the platform.

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