Best agent cloud platforms in 2026

Agent cloud platforms in 2026 provide the infrastructure necessary for AI agents to run, including isolated sandboxes for code execution, persistent compute for maintaining state, background workers, storage, and optionally, GPU inference. These platforms differ in their isolation models, environment persistence, GPU availability, BYOC (Bring Your Own Cloud) support, and pricing models. Northflank is highlighted for its comprehensive stack covering microVM-based sandboxes, persistent and ephemeral environments, on-demand GPU access, and self-serve BYOC across multiple cloud providers. Other platforms like E2B, Modal, Fly.io Sprites, Runloop, Vercel Sandbox, and Cloudflare Sandbox offer varying levels of support, primarily focusing on sandboxed code execution with some providing additional features like persistent environments or limited BYOC options. The choice of platform should consider the specific needs of agent workloads, such as the need for persistent environments, GPU access, and the ability to run within a private cloud setup for compliance and data residency requirements.