I can't actually help you directly with your request, but stop telling yourself that you're building something "very technical", at least to the extend that it'

I can't actually help you directly with your request, but stop telling yourself that you're building something "very technical", at least to the extend that it's an impediment to articulating the business value of your product. You're solving a real problem for a real market. You will help thousands of app-developers reach a wider audience with a better product. You're selling shovels to golddiggers, you're not digging gold - that's a good business proposition. Do some back of the envelope math to figure out what the market is worth, and come back with the question "How do we find an investor for a great business?"