When I think of Frugal Innovations and how can startups get funding for their solutions to scale-up, I will say Impact Investors can be one of the groups for them to secure funding.
Here is an informative interview of veteran impact investor Julia Balandina Jaquier. Julia has written the book, Catalyzing Wealth for Change: Guide to Impact Investing, to offer perspectives on how to tackle social responsibility endeavors. She sits down with Sherryl Kuhlman, Managing Director of the Wharton Social Impact Initiative, about her recommendations in the field of Impact Investing. http://knowledge.wharton.upenn.edu/article/practical-guide-impact-investing/