Our mission is to develop software enabling access to justice and individual freedom. Kleros is an open source online dispute resolution protocol which uses blockchain and crowdsourcing to fairly adjudicate disputes. Development efforts are coordinated by Coopérative Kleros, a Société Coopérative d’Intérêt Collectif SCIC incorporated in France. All our research and code development are open source and free for anyone to use. Political institutions are the result of trying to solve the practical problems of social coordination. Human communities of all times developed the institutions that were better suited to their problems, their technologies and their beliefs. Athenians of the Classical period built their court system on ideas of citizen participation with the aforementioned kleroterion for random selection. In a time of globalization and digitalization, cryptoeconomics may become the pillar for building a decentralized justice system for the Internet Age.