As the contingent workforce (think freelancer and solopreneur not gig) continues to rise, so do more sites offering tools and services to help freelancers do everything from finding work, to networking, to billing, managing flow, and more. Underpinned is a UK-based startup that looks to fit this model. They recently crowdsourced a USD $588K Seed round.
Source: https://tech.eu/brief/underpinned-crowdfund/