Anthropic is rolling out Claude features on Salesforce's Slack, a major enterprise communications platform, while Microsoft is developing a way to use Claude in Teams. Both companies have their own AI agent lineups but are pursuing app store-style platform strategies that let customers choose external agents. Anthropic's Claude Tag for Slack lets users summon Claude in group chats to review communications and handle tasks. Some inside and outside Salesforce question opening Slack to Claude, while others see potential benefits.