<p>There is no doubt that the proliferation of entrepreneurial activity is a current trend. Start-ups enable an effective transformation of knowledge, generating high added value to society. The objective of this book is to address the financing of the entrepreneurial process as a necessary element to articulate a solid business fabric, based on taking advantage of new opportunities. The book is structured in two parts. The first part takes as a reference the lack of financing in the entrepreneurship process and analyses different sources of financing available to entrepreneurs depending on the phase in which the project is located. The second part of the book analyses innovation and its links to the financing of start-ups, addressing the impact of emerging technologies and fintech services and the support of artificial intelligence. Finally, the book concludes with an examination of decentralized finance (DeFi), as an idea that is changing the financial world, giving rise to new financial paradigms.</p>