Fundraising on online platforms remains popular with companies in AI and fintech despite the risks, according to Crowdcube.
The Exeter-based crowdfunding site said it saw revenues rise 50pc to £6m last year, up from £4m in 2017.
Investments pledged by its users to growing companies increased by 72 per cent to £224m, from £130m the previous year.
The record results follow the sucess of fintech businesses Monzo and Revolut, that used Crowdcube to raise funds, valuing them at more than £1bn last year.
Crowdcube told The Daily Telegraph that the fourth quarter of 2018 was its most successful ever with pledged investments rising 94 per cent to £84.6m compared to last year.
Luke Lang, co-founder of Crowdcube, said: “It is great to see these positive results against a generally negative economic landscape and the uncertainty Brexit is causing.
“I want to see more ‘Monzos’ happen, and I think it will because more and more entrepreneurs are turning to equity crowdfunding now as the way to start their ideas.”
In Monzo’s most recent crowdfunding raise on the website in December, 36,006 people invested £20,000,000 in the fintech company in just 2 days.
Revolut reached "unicorn" status in April last year, joining craft beer company BrewDog, which hit a £1bn valuation in April 2017.