Glean is an enterprise Work AI platform built on top of a permissions-aware knowledge graph that connects and indexes a company's entire SaaS stack — over 100 connectors spanning Slack, Google Drive, Salesforce, Confluence, and more. On top of that graph, Glean delivers three products: an enterprise search engine that respects access controls, an AI assistant that generates answers grounded in company-specific context, and an agent platform that lets organizations build and deploy AI agents at scale. The platform supports flexible LLM choice (no vendor lock-in), exposes APIs for customization, and ships a dedicated security and governance layer ("Glean Protect"). Buyers are mid-market and enterprise companies with 500+ employees across financial services, healthcare, tech, and telco. Initial contracts typically run $100K–$500K/year; Fortune 500 deals can exceed $5M annually. Founded in 2019 by Arvind Jain, a former Google Search distinguished engineer, with a team drawn from Google, Meta, and Dropbox.