Rather than a direct "idea marketplace," you should target these entities based on your development stage:
Selling a "raw" app idea is extremely rare in the current tech landscape. Most companies do not buy ideas alone because they are legally risky to touch and difficult to value without proof of concept. Instead, they "buy" ideas by investing in the developing them, or by acquiring the intellectual property (IP) of a working prototype . 1. Types of Organizations That "Buy" App Concepts companies that buy app ideas
: Major tech giants like Apple have strict policies against accepting unsolicited ideas to avoid future lawsuits over "stolen" concepts. Rather than a direct "idea marketplace," you should