As of 2026, the strongest business AI stack is not a single “best” product but a layered mix of general-purpose assistants, workflow automation, meeting intelligence, analytics platforms, and customer-support agents chosen around specific business processes. That is the uncomfortable truth behind the increasingly crowded rankings of Claude, ChatGPT, Copilot, Zapier, Power BI, Notion AI, Zendesk AI, and their rivals. AI has crossed from experiment to operating expense, but the market is still...