GOnnect

Free plan LinuxWindows

What GOnnect is

GOnnect is an open-source desktop communications client for phone calls, chat, and video conferencing. It works as a SIP client and supports call transfers and ad-hoc conferences. The project names Asterisk, Fritzbox, and Cisco as compatible systems. During a phone call, a user can switch to a Jitsi Meet video conference with one click.

The client includes busy lights, configurable audio, automatic media control for incoming calls, system tray access, auto-start, global shortcuts, and design customization. The maker describes it as designed for companies and organisations, including professional enterprise use. It says self-managed operation keeps sensitive data under the user's control. GOnnect's source code is open, verifiable, and customizable, and the software is licensed under GPLv2.

GOnnect is currently available for Linux as a Flatpak. A Windows version is in active development. The changelog identifies version 2.4.1, dated July 31, 2026, as the latest release, and lists plugins for Microsoft calendars and contacts as well as CardDAV contact support. Matrix integration is planned. GOnnect is made by GONICUS and is free. It has a desktop app and SIP support; browser calling, a mobile app, and call recording are not among its listed capabilities.

Who it suits

GOnnect suits companies and organisations looking for an open-source desktop SIP client with call handling and a route from phone calls to Jitsi Meet video. It may particularly suit teams that want to self-manage communications and customize source code.

What it does well

Free to use under the GPLv2 open-source license.
Supports SIP, call transfers, and ad-hoc conferences.
Switches an ongoing call to Jitsi Meet video with one click.
Names Asterisk, Fritzbox, and Cisco as compatible systems.
Includes Microsoft calendar and contact plugins plus CardDAV contact support.

What to know first

Currently available for Linux as a Flatpak; Windows is in development.
No mobile app or browser calling.
Call recording is not supported.

Getting started

Visit the GOnnect website.
Download the Linux Flatpak.
Install the client on a Linux system.
Connect it with a compatible SIP system such as Asterisk, Fritzbox, or Cisco.
Configure audio and desktop convenience settings as needed.

Verdict

Choose GOnnect if you want a free, customizable desktop SIP client for Linux with call transfers, conferences, and Jitsi Meet handoff. Look elsewhere if you need a mobile app, browser calling, or call recording, or if you need a Windows version immediately.

Questions

Is GOnnect free?

Yes. The project describes the software as free and licensed under GPLv2.

Is GOnnect open source?

Yes. GOnnect is described as 100% open source under GPLv2, with source code that is open, verifiable, and customizable.

Which platforms can I use?

GOnnect is currently available for Linux as a Flatpak. A Windows version is in active development; there is no mobile app.

Does GOnnect support SIP?

Yes. It acts as a SIP client and supports call transfers and ad-hoc conferences. The project names Asterisk, Fritzbox, and Cisco as compatible systems.

Can I move a call to a video meeting?

Yes. Users can switch an ongoing phone call to a Jitsi Meet video conference with one click.

Who makes GOnnect, and what integrations are available?

GOnnect is made by GONICUS. The changelog lists plugins for Microsoft calendars and contacts and support for CardDAV contacts; Matrix integration is planned.

Facts from GOnnect's own pages

Availability: GOnnect is currently available for Linux as a Flatpak; a Windows version is in active development. · gonnect-project.org, 8 Oct 2026
Call handling: The site says GOnnect supports call transfers and ad-hoc conferences. · gonnect-project.org, 8 Oct 2026
Convenience features: The client includes busy lights, configurable audio, automatic media control for incoming calls, auto-start, global shortcuts, and design customization. · gonnect-project.org, 8 Oct 2026
Current platform: The maker says GOnnect is currently available for Linux as a Flatpak; Windows is in active development. · gonnect-project.org, 7 Oct 2026
Customization: The source code is described as open, verifiable, and customizable. · gonnect-project.org, 8 Oct 2026
Desktop features: The client offers busy lights, audio settings, automatic media control for incoming calls, system tray access, auto-start and global shortcuts. · gonnect-project.org, 7 Oct 2026
Headquarters: Arnsberg, Germany · gonnect-project.org, 28 Sept 2026
Integrations: The changelog lists plugins for Microsoft calendars and contacts and support for LDAP and CardDAV. · gonnect-project.org, 8 Oct 2026
Intended users: The site says GOnnect was developed for professional enterprise use and is designed for companies and organisations seeking to manage communications independently. · gonnect-project.org, 8 Oct 2026
License: The site says GOnnect is 100% open source under GPLv2. · gonnect-project.org, 7 Oct 2026
Licensing: The site describes GOnnect as 100% open source under GPLv2 and says it eliminates licensing fees. · gonnect-project.org, 8 Oct 2026
Maker: The site footer says GOnnect is made by GONICUS. · gonnect-project.org, 8 Oct 2026
PBX compatibility: The site names Asterisk, Fritzbox and Cisco as compatible systems. · gonnect-project.org, 7 Oct 2026
Planned integration: The site describes Matrix integration as planned and coming soon. · gonnect-project.org, 8 Oct 2026
Privacy and control: The site says self-managed operation keeps sensitive data under the customer's control. · gonnect-project.org, 8 Oct 2026
Product: GOnnect is an open-source unified communications client for SIP telephony, chat, and video conferencing. · gonnect-project.org, 8 Oct 2026
Release status: The changelog identifies version 2.4.1 as the latest release, dated July 31, 2026. · gonnect-project.org, 8 Oct 2026
Telephony: GOnnect supports SIP telephony and names Asterisk, Fritzbox, and Cisco as compatible systems. · gonnect-project.org, 8 Oct 2026
Version: The changelog lists version 2.4.1 as the latest release, dated July 31, 2026. · gonnect-project.org, 7 Oct 2026
Video conferencing: Users can switch an ongoing phone call directly to a Jitsi Meet video conference with one click. · gonnect-project.org, 8 Oct 2026
Video meetings: Users can switch an ongoing phone call to a Jitsi Meet video conference with one click. · gonnect-project.org, 7 Oct 2026

Where GOnnect stands on Freedom251

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