Fly.io Sprites has no ongoing free tier; what it offers is a credit grant that runs out. $30 in free trial credit, one per user and at most one per org… Catalogue date November 2026. Compare with 5 alternatives in Cloud Hosting.
Subtypes in Cloud Hosting: agent_sandbox — isolated execution environments provisioned programmatically, sold for AI agent workloads. We read that on 2026-11-03 from https://docs.fly.io/sprites, where it says: “Sprites are persistent, hardware-isolated Linux environments for running arbitrary code.” How we use this.
Fly.io Sprites has no ongoing free tier; what it offers is a credit grant that runs out: $30 in free trial credit, one per user and at most one per org… It's stable — zero pricing changes recorded. Best for cloud hosting workloads — 5 alternatives available.
$30 in free trial credit, one per user and at most one per org. Sprites are persistent, hardware-isolated Linux VMs on Fly.io for AI agents, dev environments and untrusted code, with sign-in through a Fly.io account. Compute is billed only while a Sprite runs; it pauses after about 30 seconds idle, and a paused Sprite costs nothing beyond its storage. Rates are $0.0385 per CPU-hour, $0.021875 per GB-hour of memory, $0.000683 per GB-hour of hot storage while awake and $0.000027 per GB-hour of cold storage. There is no per-Sprite charge, and bandwidth is not metered. Each Sprite has up to 8 vCPUs and 100 GB of storage. Fly.io does not say whether the credit needs a card.
No recorded pricing changes for Fly.io Sprites. This is a good sign — stable pricing.
How Fly.io Sprites compares against every one of the 5 we list, not against a selection of them. A surface with room for every member of a tied set may rotate their order. A surface with room for only some of them names none of them, because which ones it named would be the claim, and a claim seeded on the date is not the one we serve tomorrow. How we decide this.
| Service | Free Tier | Stability |
|---|---|---|
| Fly.io Sprites | Free Credits | stable |
| Vercel Sandbox | Hobby Isolated Linux microVMs for running untrusted or agent-generated code, metered by active CPU, memory, sandbox creations and data transfer. The Hobby plan includes each month at no cost: 5 hours of Active CPU, 420 GB-hours of provisioned memory, 5,000 sandbox creations and 20 GB of data transfer,… |
stable |
| PandaStack | Free Free tier with $5.40/mo usage credit. No card. |
unrated — change unconfirmed |
| Railway Sandboxes | Free $1 of free credit a month on Railway's Free plan, after a one-time $5 grant on the 30-day trial; the credit is shared with other Railway usage and does not roll over. Sandboxes are isolated Linux VMs for coding agents, test runs or code execution, managed by SDK, CLI, dashboard or API, with Claude… |
unrated |
| Cloudflare Sandboxes | Pay-per-use Persistent isolated Linux environments for AI agents — shell, filesystem, background processes. GA April 2026. |
source unconfirmed |
| Cloudflare Dynamic Workers | Paid Runtime sandbox for executing AI-generated code in V8 isolates: a Worker can create new Workers at runtime from code supplied on the fly. Only available on the Workers Paid plan (minimum $5 a month per account). |
unrated |
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We do not push notifications. Every change we record is readable the moment it lands, and the JSON answer carries an ETag — send it back as If-None-Match and an unchanged answer costs one 304.
curl https://agentdeals.dev/api/changes?vendor=Fly.io%20Sprites
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Fly.io%20Sprites