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Brex Bets on ‘Less Orchestration’ as It Builds an Agent Mesh for Autonomous Finance

Brex is shifting from traditional AI agent orchestration to an “Agent Mesh,” a network of narrow, role‑specific agents that converse in plain language and operate independently while maintaining full visibility. The mesh replaces a central coordinator with event‑driven message streams, enabling tasks such as expense approval, compliance checks, and payment initiation to be handled by specialized agents. Brex reports that customers using the new architecture achieve up to 99% automation of expense processes, a jump from the previous 60‑70% rate. The system also embeds audit agents and deterministic ordering to ensure policy adherence and reliability.