SoftBank helped the internet communication software developer secure $300m in a round which brought the company's overall funding to $697m.

Plume, a US-based online communication software developer backed by multiple corporates, has raised $300m in a funding round led by internet and telecommunications conglomerate SoftBank’s Vision Fund 2, at a $2.6bn valuation.

Founded in 2015, Plume has developed an artificial intelligence-driven platform that helps internet service providers improve their customers’ home wifi connection speed while optimising cybersecurity, access and parental controls and internet-of-things security.

The company plans to use the funding to drive research and development, strengthen its sales and…