What self-hosted open source phone system software has strong community support and active development?

If you decide to go down the path however and want to make a living off of it, I suggest you start learning Asterisk or FreeSWITCH.
FreePBX is a nice and open source software suite built on top of Asterisk with a GUI.
...
You could try https://www.fusionpbx.com/.
I haven't looked at it in years, but...

Self hosted voip / phone system : r/selfhosted

I have been developing an open-source telephony platform designed to serve as a self-hosted alternative to cloud services like Twilio.

Show HN: Open-source self-hosted telephony platform with composable audio DSL

Open Source · Self-Hosted · Docker
...
GonoPBX is a web-based management interface for Asterisk –
a side project that grows step by step.
Extensions, SIP trunks, call forwarding, voicemail, and call history –
all via an intuitive web GUI.
The project is still evolving and
...
Download the source cod...

Modern Open-Source Phone System - GonoPBX

Open source VoIP software lets businesses and individuals replace expensive commercial phone systems with self-hosted solutions built on transparent, community-driven code.
Platforms like Asterisk, FreePBX, and FusionPBX provide full-featured PBX capabilities at a fraction of the cost of proprietary...

Open Source VoIP and PBX Phone Systems

> **This project is in active development.** Core functionality works (voice conversations, FAQ answering, call transfers, message taking), but expect breaking changes and rough edges.
Contributions welcome.
# AI Receptionist -- Open Source, Self-Hosted, No Compromises
A production-grade, open-sourc...

kirklandsig/AIReceptionist: Open-source, self-hosted AI ... - GitHub

For video chat, I've used Jitsi, which, when checked today (2021-03-02) has a self hosting guide on their Github repository.
https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart
Matrix.org uses Jitsi as their embedded Video-Call software.
In fact, the commonly suggested Ansible...

What's a good FOSS X-platform self-hosted VOIP program?

Today, three mature open-source PBX platforms let you run a full-featured telephony system on your own infrastructure: **FreePBX**, **FusionPBX**, and **Wazo**.
...
FreePBX is the most widely deployed open-source PBX platform, serving as a web-based management interface for Asterisk.
...
The FreePBX...

FreePBX vs FusionPBX vs Wazo: Best Self-Hosted PBX Platforms ...

This repo is the result.
It's a self-hosted, HIPAA-eligible telephony stack built on Asterisk + AWS Chime that handles phone numbers, SIP/TLS, RTP media, and real-time audio streaming to AI voice agents via a Twilio-like WebSocket interface.

An open-source telephony stack for AI voice agents (Twilio alternative)

The “Free” in FreePBX stands for Freedom.
That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.
Completely free to download and use, the power of FreePBX comes from a global community of developers who ensure it re...

FreePBX | Open source, web-based, IP PBX management tool.

**Asterisk** – Easy to use but advanced IP PBX system, VoIP gateway and conference server.
GPL-2.0 C
...
**FreeSWITCH** – Scalable open source cross-platform telephony platform.
MPL-2.0 C
**FusionPBX** – Open source project that provides a customizable and flexible web interface to the very powerful...

List of Top Free Open Source & Self Hosted Application for ...

What is your favorite self hosted VOIP / PBX? (pls don't upvote)

Self Hosted VOIP for Home

You can try this: GitHub - 0perationPrivacy/VoIP: Web Base Telnyx/Twilio VoIP Interface enabling SMS, MMS and Voice calls using the providers API Keys and self-hosting the application..
But I suggest you try Skype and WhatsAPP firstly.
...
Yeah really cool to get hands-on with open-source VoIP!
A fe...

What is the best open source VoIP tech?

Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.
...
#### Community Members
#### Community Members
150
#### Countries with Installations

Home ⋆ Asterisk

Open Source or very lost cost VOIP or PBX System at home for Small Business

A 3CX PBX gives you the flexibility to choose with its Basic, PRO and AI Editions.
Host 3CX in your own private cloud or on-premise in your office.

PBX System for Enterprises | Self-host or On-premise

The top open source PBX providers are:
|**Provider**|**Pricing**|**Key Features**|**Best For**|
|--|--|--|--|
|Asterisk|Free and Open|- Remote call forwarding - Number porting - SMS|Small companies setting up a cloud based phone system for the first time|
|SIP Foundry|Free and Open|- Video conferenc...

The Best Free and Open-Source PBX Software

Open Source and Unified Communications partners created a new platform based on an Elastix® fork (currently purchased by 3CX) to provide the community with continuity, peace of mind and support needed to continue with their PBX and operation developments.

Best Open Source Telephony Software 2026 - SourceForge

Open Source VOIP Software & Servers - VoIP-Info.org

Asterisk is an open-source implementation of a private branch exchange, or PBX.

Building a Personal VoIP System


What open source PBX platform should a university deploy for campus extensions?

**Quick answer:** The 10 strongest open source unified communications platforms in 2026 are FreeSWITCH, Asterisk, ICTCore, ICTDialer, Kamailio, OpenSIPS, FusionPBX, Jitsi, Matrix (Element), and BigBlueButton.
...
**Best fit:** in-house PBX, school or campus phone systems, basic call recording.
...
|...

10 Best Open Source Unified Communications Software in ...

74 Open Source VoIP Apps & Resources

|Name|My Take|Key Details|
...
|FreePBX|The default choice.
Not always the best one.|Sangoma-owned.
Version 17 + Asterisk 22.
Moved from CentOS to Debian — finally.
Massive module ecosystem, but some paid modules feel like they should be free.|
|VitalPBX|The one I'd pick for a new deployment today.|...

Complete List of Asterisk-Based PBX Systems in 2026

10 Best Open Source Softswitch for Free - VoIP Forum

Best open source pbx : r/VOIP - Reddit

Best Open Source PBX Software (2026): Self-Hosted & Asterisk

## 1.
Solutions serveurs Open Source
IP PABX :
- Asterisk et dérivatifs
- Freeswitch
Proxys SIP (Fed VoIP)
- Kamailio
- OpenSips
- Repro
- Flexisip
## 2.
...
|Logiciel|Support OS|Licence|remarque|

Aperçu des logiciels de téléphonie Open Source - Protocole SIP

Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.

Home ⋆ Asterisk

Best Open Source PBX Software 2026 - SourceForge

The top open source PBX providers are:
|**Provider**|**Pricing**|**Key Features**|**Best For**|
...
|SIP Foundry|Free and Open|- Video conferencing - IM/Chat - Unified Messaging|Universities and those in the education industry|
...
With its wide variety of features and high level of security, SIP Fo...

The Best Free and Open-Source PBX Software - GetVoIP

## PBX platforms
Some of these include SIP proxy functionality
- Asterisk: Open Source PBX.
Supports IAX, SIP, MGCP, H.323 and other protocols
- CallWeaver: a fork of Asterisk with T.38 termination
- FreeSwitch Open Source PBX and Soft Switch
- OpenPBX: Open Source PBX developed using Perl
- PBX4Lin...

Open Source Asterisk PBX Decisions and recommendations

That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.

If you are a small to medium business that needs a phone system with a web interface and strong community support, start with FreePBX.
If you are a service provider, MSP, or enterprise that needs to host multiple organizations on shared infrastructure, choose FusionPBX.
If you are a developer buildi...

Best Open Source VoIP and PBX Software

SIP SERVERS

MikoPBX

Elastix Open source VoIP PBX Upgrade - Spiceworks Community


Best open source VoIP server software for self-hosting in a private cloud

Best open source pbx : r/VOIP

Open Source VOIP Software & Servers

Top 23 Voip Open-Source Projects | LibHunt

Best Open Source VoIP Software 2026

Open source SIP server / client recommendations?

22 Open-source Free and Open-source VoIP and Sip Servers

Top 50 Open Source VoIP Apps

Best Open Source SIP Servers 2026

Best Free Open-Source PBX Software for 2023

News

What is the best open source VoIP tech?

Best Open Source PBX Software Guide (2026): Top Free Tools vs ...

The Best Free and Open-Source PBX Software

|Server|Type|Best at|Scale|Pick it when|

Comparative Analysis of Various Open Source SIP Servers

FreePBX | Open source, web-based, IP PBX management tool.

Home ⋆ Asterisk

Linphone Softphone

SIP SERVERS


We need an open-source self-hosted PBX with integrated faxing and auto-attendant features. What should we choose?

ICTPBX is a carrier-grade, multi-tenant PBX management application for ISPs, ITSPs, and service
providers — built on FreeSWITCH and unified through the ICTCore REST API, run from one modern dashboard.
...
ICTPBX is an open-source PBX platform built for service providers.
It pairs the **FreeSWITCH** ...

Home | ICTPBX

Initially based off the Asterisk platform, Elastix provides open source single communications server program which includes an IP PBX, IM, email, faxing as well as collaboration functionality.
...
Owners likewise have the choice to select from dozens of add ons to really custom tailor the device wit...

7 Free Open Source PBX Software Solutions - VOIP Solutions

Open source project that provides a customizable and flexible web interface to the very powerful and highly scalable multi-platform voice switch called FreeSWITCH.
...
FusionPBX can be used as a single or domain based multi-tenant PBX, carrier grade switch, call center server, fax server, VoIP serve...

FusionPBX project - Libre Self-hosted

Issabel integrates fax servers, email, instant messaging, and CRM features into a single open source PBX software suite.
It creates a true Unified Communications environment out of the box.
...
The software PBX code is free to download, but the system is not free to operate.
You still need to pay fo...

Best Open Source PBX Software Guide (2026)

This is an open source Unified Communications Server software that is offered with IP PBX, email, faxing and collaboration functionality.
...
The Elastix functionality is based on **open source** projects and offers PBX, fax, instant messaging and email functions.
...
OpenPBX.org is an open source P...

Top 10 Open source PBX Software. - SyncBricks

An open source eFax server solution written in Python that allows sending and receiving faxes via integration with Asterisk PBX, with support for multiple accounts each with their own users and details.

GitHub - NexusPolytech/NexeFax: A modern open source eFax server solution written in Python that allows sending and receiving faxes with Asterisk.

**Quick answer:** The five strongest open-source fax server platforms in 2026 are ICTFax, HylaFAX+, Asterisk with Fax-for-Asterisk, FreeSWITCH, and ICTBroadcast.
ICTFax leads for multi-tenant deployments and white-label resellers.
HylaFAX+ wins on simplicity for Linux shops.
Asterisk and FreeSWITCH ...

Top 5 Open Source Fax Server Software in 2026

Your Open Source Asterisk PBX GUI Solution
...
This is a module for FreePBX© . FreePBX is an open source GUI (graphical user interface) that controls and manages Asterisk© (PBX).
FreePBX is licensed under GPL.
FreePBX is a completely modular GUI for Asterisk written in PHP and Javascript.
...
Module...

Module of FreePBX (Fax Configuration) :: Adds ... - GitHub

ICTFAX is an open source multi-user Fax server software solution.
ICTFAX features both inbound as well as outbound faxing solutions using T.38 protocol as well as G.711 passt hrough.

ictinnovations/ictfax: Open Source Fax Server Software ...

The top open source PBX providers are:
|**Provider**|**Pricing**|**Key Features**|**Best For**|
|--|--|--|--|
|Asterisk|Free and Open|- Remote call forwarding - Number porting - SMS|Small companies setting up a cloud based phone system for the first time|
|SIP Foundry|Free and Open|- Video conferenc...

FusionPBX can be used as a highly available single or domain based multi-tenant PBX, carrier grade switch, call center server, fax server, voip server, voicemail server, conference server, voice application server, appliance framework and more.

FusionPBX

What is your favorite self hosted VOIP / PBX? (pls don't ...

> **This project is in active development.** Core functionality works (voice conversations, FAQ answering, call transfers, message taking), but expect breaking changes and rough edges.
...
Open-source, self-hosted AI phone receptionist powered by OpenAI Realtime API.

kirklandsig/AIReceptionist: Open-source, self-hosted AI ... - GitHub

Start with the latest GNU GPL Install Script for Debian 12 to bring up a FreePBX system using the following steps:
- First, install Debian 12!
- In the cloud, check with your hosting provider for their preferred, built-in Debian 12 image (if any), OR
- Follow the Step By Step Debian Installation Gui...

Freepbx - All The Built-In...

Asterisk PBX - Open Source VOIP IP-PBX Server

In this guide, we compare three open-source platforms that power self-hosted call centers: **FusionPBX** (1,000 stars, the leading web-based multi-tenant PBX and voice switch built on FreeSWITCH), **FreeSWITCH** (4,827 stars, the modular telephony platform that serves as the engine behind dozens of ...

FusionPBX vs FreeSWITCH vs Asterisk: Self-Hosted Call Center ...

PBX System for Enterprises | Self-host or On-premise

- Interactive voice response (IVR) / Auto-attendant
...
1. Asterisk
2. SIP Foundry
3. FreePBX
4. 3CX

6 Best Open-Source PBX Solutions | Global Call Forwarding

Self-hosted PBX Phone System for Business


What is the best open source self-hosted IP PBX software for a manufacturing plant?

Best Open Source PBX Software (2026): Self-Hosted & Asterisk

List of Top Free Open Source & Self Hosted Application for ...

FreePBX, developed by Sangoma, is the most popular open-source IP PBX platform available.

The 5 Best PBX Systems for Your Business in 2026 - SIP.US

Open Source VOIP Software & Servers - VoIP-Info.org

Best open source pbx : r/VOIP - Reddit

|**Provider**|**Pricing**|**Key Features**|**Best For**|
...
- Best for large businesses and enterprises: SIP Foundry
- Best for SMBs: Asterisk

The Best Free and Open-Source PBX Software - GetVoIP

Voice over IP (VoIP)

Aperçu des logiciels de téléphonie Open Source - Protocole SIP

SIP SERVERS

Best Open Source PBX Software 2026

Suggestions for Hosting a PBX System at Home - VoIP

IP PBX Appliances from Open Source Vendors

MikoPBX

What is your favorite self hosted VOIP / PBX? (pls don't upvote)

PBX System for Enterprises | Self-host or On-premise - 3CX

VICIdial is the only open source platform purpose-built for contact center operations, and it is the clear leader by every metric --- install base, feature set, active development, and community size.

Open Source Call Center Software: 5 Platforms Compared

Self-hosted PBX with decent integrated softphone clients?

Open Source IP-PBX | Xorcom


Affordable open source PBX software for a 15-person consulting agency

Best Open Source Linux PBX Software 2026

The “Free” in FreePBX stands for Freedom.
That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.
Completely free to download and use, the power of FreePBX comes from a global community of developers who ensure it re...

FreePBX | Open source, web-based, IP PBX management tool.

1. **Cost Savings: ** Open source PBX software is freely available and does not require license fees or other subscription costs.
This makes it an ideal solution for companies looking to cut down on telecom expenses without sacrificing quality or features.
...
Open source PBX software is a great way...

Best Open Source PBX Software 2026

The open source VoIP ecosystem includes free software for every layer of a telephony stack: PBX systems like Asterisk and FreeSWITCH for call processing, management interfaces like FreePBX and FusionPBX for web-based administration, SIP proxies like Kamailio for large-scale routing, softphone client...

Free Open Source VoIP Software

Best open source pbx : r/VOIP

The Best Free and Open-Source PBX Software

The core Asterisk software is entirely free to download, install, and configure without any licensing costs.
...
As open-source software, FreeSWITCH is entirely free to download and use without any license fees.
...
As an open-source project, Elastix can be downloaded and deployed for free without a...

Best Free Open-Source PBX Software for 2023

Home ⋆ Asterisk

Jitsi Meet is open-source and is available for free.

Best Open Source VoIP 2025

Are there free PBX solutions?
Yes, there are.
These are open-source PBX software solutions.
...
VitalPBX is free to use, and a professional support package and add-ons are paid options.
...
The platform is free.
It is open-source, and there are not many pricing options or catches.
...
Bitrix24 offer...

12 Free PBX business solutions

The software PBX code is free to download, but the system is not free to operate.
You still need to pay for the server hardware (or cloud VPS hosting), SIP trunking services for outside calls, and the electricity to run it.

Best Open Source PBX Software Guide (2026)

Here are the top ten free options which will help you select the best solution to meet your business requirements.
|Provider|Best For|Key Features|Pricing|Unique Differentiator|
|--|--|--|--|--|
|CallHippo|Businesses wanting ready-to-use cloud telephony|Hosted PBX, virtual numbers, smart call routin...

Top 10 Free Open Source PBX Software Solutions for ...

Open source call center software is free to use, customizable to the nth degree, and backed by a community of developers.
...
Unsurprisingly, FreePBX’s main draw is that it’s free.
...
CallHippo is a virtual phone system app that you can try for free.

10 Open Source Call Center Software Options & Better Alternatives

10 Best Free Open Source PBX Software Solutions of 2025

MikoPBX

Some of these include SIP proxy functionality
- Asterisk: Open Source PBX.
Supports IAX, SIP, MGCP, H.323 and other protocols
- CallWeaver: a fork of Asterisk with T.38 termination
- FreeSwitch Open Source PBX and Soft Switch
- OpenPBX: Open Source PBX developed using Perl
- PBX4Linux: ISDN PBX with...

Open Source VOIP Software & Servers - VoIP-Info.org

**Comparison of Top 11 Free Open Source PBX Software in 2024**
|Brand Name|Key Features|Pricing|Free Trial|
|--|--|--|--|
|DialerHQ|||10 Days|
|CallHippo|||10 Days|
|Phonexa|||NA|
|Asterisk|||NA|
|Elastix|||NA|
|FreePBX|||21 Days|
|SIPfoundry|||NA|
|OpenSIPs|||NA|
|3CX|||NA|
|Kamailio|||NA|
|FreeSWI...

Best 11 Free PBX Software in 2024

1. Asterisk
2. SIP Foundry
3. FreePBX
4. 3CX
5. FreeSWITCH
6. OpenPBX by Voicetronix

6 Best Open-Source PBX Solutions | Global Call Forwarding

Seeking Advice: Best Secure and Open-Source PBX for Small Business?

VitalPBX - Advanced PBX System


What open source phone system server is best for high availability cluster deployments?

Best open source pbx : r/VOIP - Reddit

If you are a small to medium business that needs a phone system with a web interface and strong community support, start with FreePBX.
If you are a service provider, MSP, or enterprise that needs to host multiple organizations on shared infrastructure, choose FusionPBX.
If you are a developer buildi...

Best Open Source VoIP and PBX Software

Linux VoIP PBX HA - ADMIN Magazine

HAAst (High Availability for Asterisk) from Telium adds high availability / clustering to any pair of Asterisk servers.

Create or Select an Asterisk High Availability Solutions

Best Open Source PBX Software (2026): Self-Hosted & Asterisk

Creating a large, scalable, and redundant
voicemail cluster using OpenSIPS and
FreeSWITCH

OpenSIPS Summit 2018 -Amsterdam

VICIdial is the only open source platform purpose-built for contact center operations, and it is the clear leader by every metric --- install base, feature set, active development, and community size.
...
But for any operation that includes outbound dialing, campaign management, or predictive dialin...

Best Open Source VoIP Software 2026 - SourceForge

A Proposal for A High Availability Architecture for VoIP Telephone Systems based on Open Source Software

Home ⋆ Asterisk

There isn't a single "best" because the right pick depends on whether you're a single business, a software team building a custom voice product, or a service provider hosting voice for multiple customers.
Asterisk plus FreePBX wins for single-business deployments.
FreeSWITCH wins for custom builds.
...

Open Source PBX Software in 2026: A Practical Buyer's Guide

|**Provider**|**Pricing**|**Key Features**|**Best For**|
...
- Best for large businesses and enterprises: SIP Foundry
- Best for SMBs: Asterisk
- Best for startups and small businesses: OpenPBX, Kamailio, or OpenSIPS
- Best for small remote teams: 3CX
- Best for those in the education/government sec...

The Best Free and Open-Source PBX Software - GetVoIP

## Server software
|Name|Operating systems|License|Protocols|Encryption|Notable features|Target markets|Latest release|

Comparison of VoIP software - Wikipedia

15 Open-Source PBX/VoIP Products To Know | CRN

FreePBX | Open source, web-based, IP PBX management tool.

LINBIT HA is a comprehensive framework for building resilient, enterprise-grade high availability server clusters.

Open Source High Availability Storage - LINBIT

asterisk-alternative · GitHub Topics

Which on-premise VOIP solution would you recommend?

SIP SERVERS

|Software|Pricing|Top Features|Best For|
...
|FreeSWITCH|Free and open-source|Dialplan, Clustering, Bypass/ Proxy Media, Video conferencing, and Event Socket Library|Enprises level businesses that require a flexible UC platform|
...
The 10 best free open-source PBX software include
**Asterisk, FreeP...

10 Best Free Open Source PBX Software in 2024


Best self-hosted open source IP-PBX software for a logistics company

Kamailio vs Asterisk vs FreeSWITCH: Best Self-Hosted VoIP/PBX ...

What is your favorite self hosted VOIP / PBX? (pls don't upvote)

List of Top Free Open Source & Self Hosted Application for ...

The 5 Best PBX Systems for Your Business in 2026 - SIP.US

Open Source VOIP Software & Servers - VoIP-Info.org

MikoPBX

Best open source pbx

Self hosted voip / phone system

SIP SERVERS

PBX System for Enterprises | Self-host or On-premise - 3CX

Best Open Source PBX Software 2026

Freepbx - All The Built-In...

Self-hosted PBX with decent integrated softphone clients?

Top 10 Best Ip Phone Software of 2026

Best Free Open-Source PBX Software for 2023

Self-hosted PBX Phone System for Business - Yeastar

Open Source IP-PBX | Xorcom


Which open source self-hosted PBX has the best integration with standard SIP phones?

Best open source pbx : r/VOIP

|Capability|Details|
...
- **Choose Kamailio** if you only need SIP signaling — routing, load balancing, or a SIP front-end.
Pair it with a media server for full PBX functionality.
Many large deployments use Kamailio as the front-end with Asterisk or FreeSWITCH handling media in the backend.
- **Cho...

- New deployments: pick a SIP trunk provider (Twilio Elastic SIP,
Telnyx, Signalwire), buy or port a DID to them, and point their
Origination URI at LiveKit's SIP endpoint
(`sip:<project-id>.sip.livekit.cloud;transport=tcp`).
Enable SIP
REFER on the trunk so call transfers work.
- Then create a Live...

kirklandsig/AIReceptionist: Open-source, self-hosted AI ... - GitHub

**CloudSIP.app** is a WebRTC SIP Phone available both as a standalone web application and as a browser extension.
It is designed to work with FreePBX, Asterisk, and other SIP-compatible platforms supporting WebRTC/WSS.

Open Source Browser Extension & WebRTC SIP Phone for FreePBX

## PBX platforms
Some of these include SIP proxy functionality
- Asterisk: Open Source PBX.
Supports IAX, SIP, MGCP, H.323 and other protocols
- CallWeaver: a fork of Asterisk with T.38 termination
- FreeSwitch Open Source PBX and Soft Switch
- OpenPBX: Open Source PBX developed using Perl
- PBX4Lin...

Self hosted voip / phone system

**Eqivo** – Eqivo implements an API layer on top of FreeSWITCH facilitating integration between web applications and voice/video-enabled endpoints such as traditional phone lines (PSTN), VoIP phones, webRTC clients etc.

A few solid ones people use are Asterisk or FreeSWITCH for full PBX/telephony setups, and Kamailio/OpenSIPS if you just want powerful SIP routing without all the extra stuff.

What is the best open source VoIP tech?

Best Open Source PBX Software Guide (2026)

The Best Free and Open-Source PBX Software

Best Open Source VoIP Software 2026 - SourceForge

6 Best Open-Source PBX Solutions | Global Call Forwarding

FreePBX | Open source, web-based, IP PBX management tool.

Home ⋆ Asterisk

MikoPBX

|#|Tool|Category|Overall|Features|Ease of Use|Value|
...
It supports flexible deployment options including self-hosted on Windows/Linux or cloud-hosted instances, integrating seamlessly with SIP trunks and popular hardware phones.

Top 10 Best Voip Telephone Software of 2026 - Gitnux

10 Open Source Call Center Software Options & Better Alternatives

Open Source PBX Software in 2026: A Practical Buyer's Guide


What open source PBX platform is best for building custom telephony applications?

Best open source pbx : r/VOIP - Reddit

**Quick answer:** The 10 strongest open source unified communications platforms in 2026 are FreeSWITCH, Asterisk, ICTCore, ICTDialer, Kamailio, OpenSIPS, FusionPBX, Jitsi, Matrix (Element), and BigBlueButton.
...
FreeSWITCH is the most flexible open source telephony engine available.
...
|If you nee...

10 Best Open Source Unified Communications Software in ...

That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.

Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.

Home ⋆ Asterisk

The best open source VoIP and PBX software available today includes FreePBX for accessible single-site deployments, FusionPBX for multi-tenant and carrier-grade requirements, and the raw Asterisk and FreeSWITCH engines for organizations that need maximum customization.
...
If you are a small to medi...

Best Open Source VoIP and PBX Software

Open source best PBX sokution

Best Open Source PBX Software (2026): Self-Hosted & Asterisk

|Name|License|Self-Hosted|Federation|E2E Encryption|Best For|
...
**If you need a complete, self-hosted PBX and can invest in setup**, start with FusionPBX—it's FreeSWITCH with a UI, cutting deployment time by weeks.
**If you're scaling beyond 1,000 concurrent calls and have a dedicated ops team**, ...

5 Best Open Source FreeSWITCH Alternatives (2026)

|**Provider**|**Pricing**|**Key Features**|**Best For**|
...
Asterisk is best for small businesses and SMBs that need a custom VoIP phone system with a focus on voice and texting functionality.
...
Here are some suggestions for organizations of various sizes and industries:
- Best for large business...

The Best Free and Open-Source PBX Software - GetVoIP

- **Asterisk: ** An open source telephony engine that supports voice, video, data and text communication.
It provides PBX features such as call routing, auto attendants, VoIP integration and call conferencing.

Best Open Source PBX Software 2026 - SourceForge

**Pick Asterisk plus FreePBX.** The community is huge, the deployment is well-trodden, and the feature set is more than enough for an internal phone system.
You're a software team building a custom voice product or a contact-center workload where you control the call flow from your own code.
**Pick ...

FreePBX, developed by Sangoma, is the most popular open-source IP PBX platform available.

The 5 Best PBX Systems for Your Business in 2026 - SIP.US

Best Free Open-Source PBX Software for 2023

**VICIdial** --- The dominant open source contact center platform.
Full predictive dialing, inbound ACD, blended campaigns, call recording, real-time monitoring, agent scripting, and a non-agent API.
...
### What is the best open source call center software in 2026?
VICIdial is the only open source ...

Open Source Call Center Software: 5 Platforms Compared - ViciStack

The open source project Asterisk (see below in PBX platforms) implements a software based PBX (Private Branch Exchange), or a private telephone switch that provides switching (including a full set of switching features) for an office or campus.
...
3. **Open Source Software PBX**– Open Source PBX de...

74 Open Source VoIP Apps & Resources

Asterisk is an open-source communications framework for creating custom VoIP PBX systems.
...
After evaluating 10 technology digital media, Dialpad stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in t...

Best Voip Pbx Software: 2026 Comparison - Gitnux

Using SIP Trunks with an Open-Source PBX | Global Call Forwarding

VitalPBX - Advanced PBX System


Recommend an open source PBX software with robust REST APIs for CRM integration.

ICTPBX is an open source, carrier-grade PBX platform built for ISPs, ITSPs, and service providers.
It combines FreeSWITCH 1.10 as the media engine with FusionPBX 6.6 for PBX configuration, unified through the ICTCore REST API and managed from a modern Angular 13 web dashboard.

ICTPBX

☎ Elastix and Asterisk API to make PBX easy to manage
...
Issabel Is A Free Open Source Software Platform For Unified Communications.

Build software better, together

Full-featured IPBX solution built atop Asterisk with integrated Web administration interface and REST-ful API.

Wazo - Self-hosted software

Advanced omni-channel contact center with IVR studio, CRM automation, collaboration and WebRTC agent dialing.
Scales to thousands of agents.
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Fax-over-IP server with Email-to-Fax, Fax-to-Email and Web-to-Fax.
T.38 & G.711 origination, ATA support and full REST APIs.
...
### ICTDialer & ICTCRM OPE...

Open Source VoIP & ICT Software | ICT Innovations

Home ⋆ Asterisk

Best open source pbx : r/VOIP - Reddit

An open source software programmable telecommunication platform
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Wazo Platform is an open-source Unified Communication solution designed to provide comprehensive communication tools for businesses.
It includes features such as IP telephony, instant messaging, video conferencing, and more.

Wazo Platform

MikoPBX is an open-source GUI (graphical user interface) that controls and manages Asterisk (PBX).
...
MikoPBX - is free, easy to setup PBX for small business based on Asterisk 16 core

MikoPBX — free open-source PBX for small business, built ... - GitHub

Best Open Source Linux PBX Software 2026

Issabel integrates fax servers, email, instant messaging, and CRM features into a single open source PBX software suite.

Open source project for VOIP calls to a bot

Some of these include SIP proxy functionality
- Asterisk: Open Source PBX.
Supports IAX, SIP, MGCP, H.323 and other protocols
- CallWeaver: a fork of Asterisk with T.38 termination
- FreeSwitch Open Source PBX and Soft Switch
- OpenPBX: Open Source PBX developed using Perl
- PBX4Linux: ISDN PBX with...

Open Source VOIP Software & Servers - VoIP-Info.org

Linphone Softphone

FreePBX

The top open source PBX providers are:
|**Provider**|**Pricing**|**Key Features**|**Best For**|
...
|Asterisk|Free and Open|- Remote call forwarding - Number porting - SMS|Small companies setting up a cloud based phone system for the first time|
...
REST APIs allow integration of features, including...

SipX is an open-source PBX software application that executes the Session Initiation Protocol (SIP) to establish an IP-based communication system.
This standard-based SIP open architecture makes the software relatively popular to both middle or large enterprises.
The writing in it is done using C++ ...

Best Top 10 FREE PBX Software Open Source Phone Systems

- **CRM integrations:** Mature open source software may have pre built integrations.
Other software may require extensive API and SDK programming to achieve a two-way information exchange between back-end and front-end systems.
...
Asterisk is a widely used open source PBX framework with call center...

10 Open Source Call Center Software Options & Better Alternatives

Open source telephony software is a category of software that enables the user to make and receive telephone calls using shared or open-source code.

Best Open Source Telephony Software 2026 - SourceForge

Best method for Basic FusionPBX API? | Page 2


What open source PBX software should a real estate office self-host?

FreePBX | Open source, web-based, IP PBX management tool.

The best open source VoIP and PBX software available today includes FreePBX for accessible single-site deployments, FusionPBX for multi-tenant and carrier-grade requirements, and the raw Asterisk and FreeSWITCH engines for organizations that need maximum customization.
...
If you are a small to medi...

Best Open Source VoIP and PBX Software

FS PBX is not just a product, it’s a community-driven open-source project.
Licensed under the Apache 2.0 License, it is free to use, modify, and distribute.

FS PBX – Open Source PBX Dashboard for VoIP Providers

Browse free open source PBX software and projects for Linux below.
...
Issabel PBX - Unified Communications
Unified Communications Server
VICIdial Contact Center Suite
A domain based multi-tenant PBX & voice switch for FreeSWITCH

Here we list the 6 best open-source PBX solutions with information about their PBX software and features, so you can make an informed decision when finding a PBX provider:
1. Asterisk
2. SIP Foundry
3. FreePBX
4. 3CX
5. FreeSWITCH
6. OpenPBX by Voicetronix
### 1.

6 Best Open-Source PBX Solutions | Global Call Forwarding

trixbox CE is an easy to install, VOIP phone system based on the Asterisk PBX.
trixbox is designed for home or office use.
...
Elastix is a software-based PBX powered by 3CX and based on Debian.
...
VoiceOne gives you the ability to install and compleatly configure a pbx platform based on Asterisk 1...

Best Open Source VoIP Software 2026 - SourceForge

FusionPBX for GUI.
FreeSwitch.
Opensips for proxy.
...
If you want a turnkey solution and a 5-minute install, nothing comes close to Incredible PBX.
...
Check out FS PBX for FusionPBX.

Best open source pbx : r/VOIP

The top open source PBX providers are:
|**Provider**|**Pricing**|**Key Features**|**Best For**|
|--|--|--|--|
|Asterisk|Free and Open|- Remote call forwarding - Number porting - SMS|Small companies setting up a cloud based phone system for the first time|
|SIP Foundry|Free and Open|- Video conferenc...

The Best Free and Open-Source PBX Software

Best Open Source PBX Software Guide (2026)

**VICIdial** --- The dominant open source contact center platform.
Full predictive dialing, inbound ACD, blended campaigns, call recording, real-time monitoring, agent scripting, and a non-agent API.
Licensed under AGPLv2.
...
VICIdial is the only open source platform purpose-built for contact cente...

Open Source Call Center Software: 5 Platforms Compared

The first meaning is a media engine and signaling stack you can self-host: Asterisk and FreeSWITCH are the two foundational projects everyone else builds on.
...
You’re a single business with under 100 extensions, on-premise or self-hosted, and you don’t plan to resell voice service.
**Pick Asterisk...

Open Source PBX Software in 2026: A Practical Buyer’s Guide

Start with the latest GNU GPL Install Script for Debian 12 to bring up a FreePBX system using the following steps:
...
- Then, execute our GitHub hosted “install” script, and follow the FreePBX system prompts.

Freepbx - All The Built-In...

FreePBX is an open-source web-based graphical user interface (GUI) that manages Asterisk
-
...
That’s because FreePBX, the world’s most popular open source IP PBX, gives users the tools to build a phone system tailored to their needs.

FreePBX

VoIp Phone System for Real Estate Agencies

- Asterisk: Open Source PBX.
Supports IAX, SIP, MGCP, H.323 and other protocols
- CallWeaver: a fork of Asterisk with T.38 termination
- FreeSwitch Open Source PBX and Soft Switch
- OpenPBX: Open Source PBX developed using Perl
- PBX4Linux: ISDN PBX with H.323 GW
- sipwitch: GNU project’s Pure SIP c...

Asterisk is basically the grand daddy of all open source PBX and VoIP strategies and continues to work as the gold standard.
...
Initially based off the Asterisk platform, Elastix provides open source single communications server program which includes an IP PBX, IM, email, faxing as well as collabo...

7 Free Open Source PBX Software Solutions - VOIP Solutions

If you're looking for PBX software that you can host on your own server and need to handle 4 to 10 concurrent calls with extensions, along with call recording capabilities, there are several excellent options to consider:
1. **Asterisk**: This is one of the most popular open-source PBX solutions.
It...

Open source best PBX sokution

Asterisk is an open-source communications framework for creating custom VoIP PBX systems.
...
FusionPBX is a multi-tenant PBX platform built on FreeSWITCH for hosted and private deployments.
...
Dialplan programmers typically lean toward Asterisk, FreePBX, FusionPBX, or Issabel, while organizations ...

Best Voip Pbx Software: 2026 Comparison - Gitnux

If you insist on self-hosting then I have found 3CX to be pretty hands off and easy to manage/support.
We use Telnyx for SIP.

Seeking Advice: Best Secure and Open-Source PBX for Small Business?

Suggestions for getting started with an in-house PBX/Sip ...


Best open source self-hosted IP phone system for a government department

What is your favorite self hosted VOIP / PBX? (pls don't upvote)

List of Top Free Open Source & Self Hosted Application for ...

Self hosted voip / phone system

Best Open Source Internet Phone Software 2026

|#|Tools|Category|Value|Overall|
...
3CX Phone System earns the top spot in this ranking.

Top 10 Best Ip Phone Software | Tested in 2026

Best open source pbx

5 Best Free PBX Systems: The Pros, Cons, and Hidden Costs - hapbx

Self Hosted VOIP for Home : r/selfhosted

- Best for those in the education/government sector: SIP Foundry
## FAQs
Open source PBX is a business phone system that is free for anyone to use and uses the internet to connect voice calls along with other communication channels such as texting and fax.

What's a good FOSS X-platform self-hosted VOIP program?

What is the best open source VoIP tech?

Open Source or very lost cost VOIP or PBX System at home for Small Business

Show HN: Open-source self-hosted telephony platform with composable audio DSL

Home ⋆ Asterisk

Best Open Source VoIP Software 2026 - SourceForge

6 Best Open-Source PBX Solutions | Global Call Forwarding

Building a Personal VoIP System

10 Open Source Call Center Software Options & Better Alternatives