Seedrs has secured more than £2m of investment via its own platform, setting a new world record for the most equity raised via a crowdfunding site.
The London-based startup had originally called for £750,000 of investment in return for 12.66% equity.
The overwhelming response saw Seedrs hit £750,000 by 10:30 am on the day the campaign opened, reach £1 million by that afternoon and secure £1.5m in just two-and-a-half days.
It has now secured over £2.1m - nearly three times the target amount - from over 850 investors, in return for just under a 30% stake in the business.
Jeff Lynn, chief executive and co-founder of Seedrs, says: "We see this as a tremendous validation of equity crowdfunding, our model and our business."
He adds: "The significant additional capital we have secured will help us grow more quickly, and just as importantly, we want to get as many investors as we can - there are no better marketers than people with a vested interest in our success."
Seedrs currently has more than 27,000 registered members on its books, and has now funded £4.5 million across 51 deals in the 17 months since it launched.