Enterprise AI company Glean has achieved $300 million in annual recurring revenue (ARR), tripling its revenue in just 15 months. This growth comes as CFOs become more cautious about AI spending. The Palo Alto-based startup, which reached $100 million ARR in early 2025, has now hit $300 million by May 2026, showcasing a remarkable growth trajectory. Glean's success is attributed to its unique offering of a permissions-aware knowledge graph, allowing AI-powered search across company tools while maintaining data privacy. The platform supports over 15 large language models, offering flexibility and compliance features that appeal to Fortune 500 companies. Glean's $7.2 billion valuation, following a $150 million Series F funding round in June 2025, underscores investor confidence in its business model, despite the broader scrutiny of AI budgets.