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You can get a pre-seed capital. However, your chances of getting investors are higher if you have already worked on the project and developed it up to an acceptable organic stage.
Report Sheriff's answer
A marketing plan is an absolute necessity to validate your idea, establish a niche in the market, assess the competition and estimate the amount of funding you will need with credible detail to present to those who may be able to support you.
Please see my answer to the question at: https://www.micromentor.org/question/4047