Highlight AI Raises $40M Series A — Building 'Shared Intelligence Layer' Across Workplace Tools and Agent Workflows

SaaS Rise·medium signal

Highlight AI raised $40M Series A on March 24 to build an intelligent operating system for teams and AI agents — a shared intelligence layer that sits across workplace tools rather than replacing them. The architectural pattern: instead of another point solution, Highlight creates a cross-tool context layer that both humans and agents can read from and write to. This is the 'middleware for AI agents' thesis — the value isn't in any single tool but in the connective tissue between them.