Ingate Systems was founded in 2001 as a joint venture between the Swedish companies Intertex Data AB, which had developed the first SIP proxy-based SIP aware firewall for the SOHO and SMB market,[3] and Cendio Systems AB, which had developed the Fuego enterprise firewall.

Intertex became sister company to Ingate, with joint development, and continued its development of its embedded products, Ethernet and DSL access routers for telecom service provider's volume deployment of SIP services to the home and SMB LAN:s – products that include firewall, SBC and IP PBX functionality.

In the fall of 2012, the group companies Ingate and Intertex merged into current Ingate Systems, to join their efforts for global unified communication beyond traditional telephony using both the SIP standard and the emerging WebRTC[4] standard and to cover the product range from home and SOHO to enterprise and carrier usage.

The Ingate products are all based on an SBC architecture where an IETF RFC 3261-compliant SIP proxy controls the NAT and firewall engine to route all types of media between parties on both public and private IP networks.

[15][16] Products are being developed to also support and enable the upcoming WebRTC standard,[17][18] an initiative by Google to bring high quality multimedia real-time communication directly into the web browser.