Gitcoin is best known for inventing and scaling quadratic funding, a method for funding public goods, and for treating funding as an ongoing design problem, expanding into new approaches like retroactive funding and building tools such as Grants Stack so other communities can use the same grant system. Rather than funding startups for financial returns, Gitcoin supports open-source projects that make up the Ethereum ecosystem, builds identity tools like Human Passport to stop fake accounts from gaming its funding systems, and governs itself as a DAO so that decision-making is spread across its community rather than controlled by a CEO.