Fin by Intercom is a focused, proven AI support agent that resolves customer queries using your knowledge base, with a massive real-world track record and deep integrations across the customer service stack. Glean is an enterprise-wide AI search platform that connects to 100+ business apps and helps employees find information fast — a fundamentally different use case with exceptional funding and growth momentum behind it. Both have mature developer infrastructure and strong enterprise security credentials. The meaningful difference is audience and intent. Fin faces outward — it talks to your customers. Glean faces inward — it helps your employees. Fin's weakness is pricing unpredictability at scale; Glean's weakness is its steep enterprise-only entry point and occasional accuracy gaps on complex queries. Neither has cracked output reliability perfectly, but both are production-ready. Choose Fin if your immediate pain is customer support volume and you need measurable deflection rates fast. Choose Glean if your organization is hemorrhaging productivity because knowledge is scattered across dozens of tools and no one can find anything. They're not really competitors — but if you can only budget for one AI platform this quarter, Fin offers a faster, more measurable return for most business owners.