Portia

Portia AI is an open-source SDK and cloud platform for building stateful, production-ready AI agents that are predictable, authenticated, and human-in-the-loop capable. It provides developers with structured multi-agent planning, built-in auth and governance, and access to 1,000+ tools via Portia Cloud and MCP. Trusted by teams at Microsoft, Skyscanner, and The Telegraph, Portia targets enterprise and developer teams building compliant agents in regulated industries. General Catalyst-backed, it differentiates through a focus on reliability and auditability rather than raw capability.