Access to finance is crucial for start-up firms as it represents the main barrier for expansion and growth. Therefore, many entrepreneurs discover at an early stage of the firm the need to attract money in order to commercialize their concepts. This explains why many new financing opportunities for startups have evolved in the last century while entrepreneurship gained more and more significance. This trend started in the United States, representing the leading nation worldwide for entrepreneurship and finance, and spread globally during the last decades. As a result, entrepreneurs are facing a variety of financing possibilities these days and are challenged to find the perfect option for their startup.