You can test B2C ideas using a landing page with a basic funnel, performance Marketing and manual reach out (e.g. FB groups). It's much harder for B2B. Here, y

You can test B2C ideas using a landing page with a basic funnel, performance Marketing and manual reach out (e.g. FB groups). It's much harder for B2B. Here, you usually need a good professional social network to get in touch with your target group. Also, even if you had the perfect product, it's really hard to sell to a big company as long as you're a tiny one. So, get partners who sell for you to their existing contacts. So, if you're for example building a search engine to be integrated in company websites, pitch to larger digital agencies. Regarding the legal stuff: your parents/ girlfriend/ best friend can be the business "owner" until you get relevant traction.