Initially, ISRG was funded almost entirely through large donations from technology companies. In late 2014, it secured financial commitments from Akamai, Cisco,

Initially, ISRG was funded almost entirely through large donations from technology companies. In late 2014, it secured financial commitments from Akamai, Cisco, EFF, and Mozilla, allowing the organization to purchase equipment, secure hosting contracts, and pay initial staff. Today, ISRG has more diverse funding sources; in 2018 it received 83% of its funding from corporate sponsors, 14% from grants and major gifts, and 3% from individual giving.