Guides

Technical guides on sandbox isolation for AI agents: hypervisors, microVMs, kernel-sharing boundaries, and how to choose infrastructure for agent workloads.

CodeSandbox Alternatives for AI Agents (2026)

CodeSandbox CI and Repos shut down in 2026. Seven alternatives for AI-agent workloads, compared on session durability, failure contract, credential architecture, and control plane.

Utpal Nadiger · July 20, 2026

QEMU vs KVM for AI Agent Sandboxes

KVM is a Linux kernel module; QEMU is the userspace VMM that uses it. They are two parts of one stack, not competing options. The real decision is QEMU vs Firecracker vs Cloud Hypervisor, evaluated from a production QEMU-on-KVM fleet.

Utpal Nadiger · July 20, 2026

Firecracker vs Cloud Hypervisor vs Kata Containers

Firecracker and Cloud Hypervisor are hypervisors; Kata Containers is a container runtime that drives one of them. The actual layers, the kernel-sharing boundary, and the feature differences that decide the pick for AI-agent isolation.

Utpal Nadiger · July 20, 2026

E2B Alternatives for AI Agent Sandboxes (2026)

E2B alternatives for AI agent sandboxes compared: Daytona, Modal, Vercel, Morph, Runloop, Cloudflare, and OpenComputer, on live CPU/RAM resize, persistence, isolation, and price.

Utpal Nadiger · July 20, 2026

GitHub Codespaces vs Gitpod for Autonomous AI Agents

Cloud development environments were built for a human who closes the laptop. How Codespaces, Gitpod (now Ona), Coder, and agent VMs handle an unattended agent, on idle behavior, session limits, and live resize.

Utpal Nadiger · July 20, 2026

Claude Agent SDK: Where Does the Agent Actually Run?

The Claude Agent SDK gives you the agent loop and tools, not the computer. Compare local, Docker, VPS, ephemeral sandboxes, and persistent VMs for running it in production.

Utpal Nadiger · July 20, 2026

Podman vs Docker for Running Untrusted Code

Rootless and daemonless both shrink the blast radius, but Podman and Docker share the host kernel. Here is where that stops mattering, walked up the isolation ladder to a VM with its own kernel.

Utpal Nadiger · July 20, 2026

Python Sandbox: Every Approach, Honestly Ranked

Which Python sandbox actually contains untrusted code? A ranked walkthrough from in-process tricks that fail to microVMs that work, with a working escape you can run.

Utpal Nadiger · July 20, 2026