The opening of Vonage's new European HQ in the heart of East London's Silicon Roundabout underlines the capital city's status as Europe's tech hub, according to Rajesh Agrawal, Deputy Mayor for Business.
"With world class talent, a global financial services hub and a high concentration of global decision makers, it is no surprise to see that overseas businesses such as Vonage are continuing to choose London as their place to establish a European headquarters," he stated.
"Vonage's expansion into the capital offers further proof that London is the tech capital of Europe."
The global cloud communications provider has also unwrapped plans to expand its UK team of 200 in a bid to accelerate its international expansion campaign.
Vonage CEO Alan Masarek said: "As an international business technology company experiencing fast growth, we see London as crucial to the continued success of our business.
"We've seen accelerated growth in this region and, as we look to build on this momentum in the next few years, we are confident that London, with its rich heritage in technology and community of tech-savvy businesses, is the best place for us to do that.
"By embracing technology and reshaping how companies communicate, we're helping to drive better business outcomes for those who have made this leap to the cloud.
"Our expanding team and presence in London positions us well to support the continued upward trend of the market here."
Vonage opened its first London office in 2005 in Hammersmith, West London.
In 2016 it acquired east London-founded CPaaS company Nexmo, which, at $230m, was the largest exit of a London start-up that year.