Most AI builders fumble these terms. Sandbox, virtual machine, container, MicroVM, and sandboxed VM sound interchangeable. They are not. This glossary translates each one into plain English and a single house-and-workshop analogy so you stop guessing which isolation layer your AI agent actually needs.
| Term | Plain-English meaning | House analogy |
|---|---|---|
| Sandbox | Any fenced-in space where code runs with rules. | A fenced-off workshop area. |
| Virtual machine (VM) | A complete fake computer with its own operating system. | A temporary model house built inside the workshop. |
| Container | A lighter, faster version that shares some plumbing with the host. | A workbench bay inside the workshop that shares the house’s electricity and plumbing. |
| MicroVM | A stripped-down VM that starts very quickly. | A tiny prefab model house that pops up inside the workshop. |
| Sandboxed VM | A VM with extra access rules layered on top. | A temporary model house inside the workshop, with locked doors, no spare keys, and strict house rules. |
Source: Product with Attitude. Tested April 2026.