An alternative form of financing for projects of all kinds. Via a digital platform, many people can participate in realizing product and business ideas or social projects with very small amounts. If the respective project can be successfully implemented, they usually receive something in return, such as a free copy, discounts or preferential prices, or intangible recognition, such as special appreciation as a donor. If, on the other hand, the required sum for the start of the project is not collected, the investors receive their money back. Special forms of Crowdfunding are crowd-investing and crowdlending.