# Fly.io Sprites

> Persistent, hardware-isolated Linux microVMs for running arbitrary code such as AI agents, with checkpoint/restore and per-second billing.

- id: `fly-sprites`
- category: Infrastructure (`infrastructure`)
- url: https://fly.io/sprites/
- docs: https://docs.fly.io/sprites
- status: active
- pricing: paid
- tags: sandbox, microvm, code-execution, persistent, hosting
- llms.txt: https://docs.fly.io/llms.txt
- related: Fly.io (https://indexagentica.com/entries/fly-io/); E2B (https://indexagentica.com/entries/e2b/); Vercel Sandbox (https://indexagentica.com/entries/vercel-sandbox/)
- sources: https://fly.io/sprites/ , https://docs.fly.io/sprites , https://docs.fly.io/sprites.md
- added: 2026-10-12
- updated: 2026-10-12
- last verified: 2026-10-12
- maintainer: Fly.io
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/fly-sprites/
- json: https://indexagentica.com/api/entries/fly-sprites.json

Sprites keep their ext4 filesystem between runs, go idle (`warm`/`cold`) with no compute charges, and wake on the next request. Fly.io lists AI code execution, untrusted code, development environments and CI tasks as use cases.