ISG is a technology research and advisory firm that helps large enterprises and public sector organizations make and execute major technology decisions. Core services include IT sourcing advisory (helping clients select vendors, structure contracts, and negotiate pricing), digital transformation planning, organizational change management, and training delivery. ISG serves primarily Forbes Global 2000 companies across banking, healthcare, energy, insurance, and manufacturing, as well as state and local governments and select public sector clients in the UK, Italy, and Australia. ISG has no U.S. federal government exposure. The firm sells through a direct relationship model, with roughly 85% of revenue coming from repeat clients. ISG's business model blends project-based advisory fees with recurring subscription and platform revenues, which represent roughly 46% of total revenue. Key recurring revenue products include GovernX, a SaaS platform for vendor and contract governance; ISG Research, a subscription benchmarking and provider evaluation service; and ISG Inform, a data-as-a-service benchmarking tool. The ISG Tango platform digitizes the sourcing process and handles over $25B of total contract value, while also enabling ISG to serve mid-market clients it previously couldn't address economically. ISG positions itself as vendor-agnostic, differentiating from large IT consultancies that have conflicts of interest when recommending vendors. ISG's growth strategy centers on expanding AI advisory work, growing recurring revenues, and pursuing tuck-in acquisitions to add capabilities and geographic reach.