Funding can and may need to come from multiple sources. Crowd sourcing, grants from non-profit organizations, governments, or festival awards, and of course, your rich friends and relatives.
Which platform is right for you and your project?
IndieGoGo started out as crowdfunding for indie film projects. It has since grown into other industries and much of their success lies in technology products. They provide the ability to fund your project either as "all or nothing" or partially funded.
Kickstarter does better in funding film projects, but they have been an "all or nothing" funding style. If you don't reach your pledge goal, you don't get any funds.
Seed&Spark has a unique approach. Projects not only ask for money, but costs are listed out by line item. You may need funding for post and you can list out lines for an editor, a colorist, audio, foley, titles. For film projects, they have the highest success rate for funding.
GoFundMe is more for charity, but still there are some very small short film projects that get funded. The one good thing about GoFundMe is there are less rules in place and they have the largest audience. But if you have a larger scale project, this will be your last option for funding.