Top BYOC AI sandboxes for running untrusted code in 2026

AI agents and code-executing developer tools require secure environments to run untrusted code, and Bring Your Own Cloud (BYOC) AI sandboxes offer a solution by executing workloads within a user's own cloud account or Virtual Private Cloud (VPC). Key considerations when selecting a BYOC AI sandbox include the deployment model, isolation methods, lifecycle design, networking controls, and operational overhead. Northflank, Daytona, and E2B are leading BYOC AI sandbox platforms, each offering unique features such as microVM-based isolation, Docker-based environments, and varying levels of lifecycle and networking integration. These sandboxes allow execution within user-controlled infrastructure, ensuring compliance with security policies and data residency requirements, while still benefiting from platform-managed orchestration and lifecycle management. Northflank offers a broad infrastructure support range and has been in production since 2021, while Daytona focuses on customer-managed compute and E2B provides solutions primarily for AWS enterprise customers. Choosing the right platform depends on specific requirements such as the need for strong isolation, support for ephemeral and persistent environments, access to private services, and minimizing infrastructure management responsibilities.