Table of contents - Key Takeaways - The Best AI Agent Runtimes & Platforms at a Glance - What Is an AI Agent Runtime? - Why the Runtime Layer Matters in 2026 - What to Look For in an AI Agent Runtime or Platform - The Best AI Agent Runtime Tools & Platforms in 2026 - AI Agent Runtimes Compared: Side-by-Side - How to Choose by Use Case - Security Risks of AI Agent Runtimes - Secure AI Agent...