‘Solidarity-based finance' is characterized by a system of funding partnerships between economical operators : a trust-based relation emerging from social interactions, a stewardship enabling convergent anticipations, and a financial partnership. It operates in socio-economic institutional mutations which affect the supply and demand of funding. It offers new opportunities to productive operators excluded by financial regulation transformations. Therefore, peripheral financial activities required to sustain the dominant financial system are taken into consideration. The ‘solidarity-based finance' is implemented by various organizations sharing specific characteristics. This unique concept is based upon territorialized solidarity-based funding agreements that are defined by information acquiring mechanisms (which are individualized but nonetheless normalized); collective commitments and association of various stakeholders (civil society, cooperative banks, local authorities, corporations). The diversity of resources and their interactions compel ‘solidarity-based finance' to anchor its role in a mediation between several policies, with more or less solid ground rules. Because of this collaborative nature, ‘solidarity-based finance' organizations operate in a non-competitive environment. However, they also offer means of funding for the reinstatement of part of local economy. It so contributes to the mutations of the wider financial system while promoting innovative means of funding.