Gigaclear has secured £6.5 million in funding and will use the money to roll out 1Gb broadband to another 6,000 rural premises.
The company has raised finance from both existing and new investors, and will now focus on the expansion of its ultra-fast broadband network in new parts of the countryside.
Gigaclear owns and operates 17 rural fibre networks across Oxfordshire, Kent and Rutland. It also has 20 more under construction across Oxfordshire, Kent, Rutland, Northamptonshire and Cambridgeshire.
Matthew Hare, Chief Executive of Gigaclear, said the company is "determined" to accelerate the delivery of ultra-fast broadband.
"With strong support from existing and new shareholders, we will meet the record demand we are seeing for our transformational broadband," he claimed.
"Rural communities across the UK realise that they can leapfrog a whole generation of technology with a new, ultra-fast, pure fibre network that can scale to thousands of megabits per second."
Mr Hare said Gigaclear's 1Gb network can future-proof communities for many years.
It can allow rural homes and businesses to reap benefits not yet available to many towns and cities in the UK, he claimed.
"We are already putting this new investment to work, building new networks and serving thousands of homes and businesses," Mr Hare stated.