This method is one of the easiest to start, and gives much flexibility as almost any kind of idea can be funded through crowdfunding platforms, as numerous community members(who can be early users at the same time) are responsible for funding success.
Oculus is the example of success crowdfunding company, which in few hours gathered $2 400 000.
tools
Crowdfund Innovations & Support Entrepreneurs
SeedInvest: Startup Investing. Simplified.
StartEngine: Invest in Startups Online
GoFundMe: #1 Fundraising Platform for Crowdfunding
CircleUp | Data Insights & Capital Financing For The World's Best Consumer Brands
additional information