Many new startups choose to incorporate in Delaware, US because of its well established corporate law. Institutional US investors will require a Delaware c-corp prior to investment, so if you incorporate elsewhere and then decide you want to raise funds in the States, you will likely need to reincorporate later. Of course there are startups all over the world, but the question is really about access to capital - typically US investors want to invest in DE c-corps. Feel free to reach out if I can be helpful!