Cloudflare Sandbox vs Fly.io Sprites

Cloudflare Sandbox costs $0.072 per vCPU-hour and Fly.io Sprites costs $0.0385 per vCPU-hour. Cloudflare Sandbox runs Firecracker microVMs. Fly.io Sprites runs microVMs.

Updated Oct 14, 2026

Cloudflare Sandbox

Containers at the edge, driven from a Worker.

Isolation: Firecracker microVM
Free tier: None
Max session: Not listed

Visit site Cloudflare Sandbox profile

Fly.io Sprites

Persistent Linux computers that sleep when idle.

Isolation: MicroVM
Free tier: $30 trial credit
Max session: Not listed

Visit site Fly.io Sprites profile

What is different

7 fields differ. The rest are the same or not listed.

Field

Cloudflare Sandbox

Fly.io Sprites

vCPU, per hour: Cloudflare Sandbox: $0.072; Fly.io Sprites: $0.0385
RAM, per GiB-hour: Cloudflare Sandbox: $0.009; Fly.io Sprites: $0.021875
Storage: Cloudflare Sandbox: $0.000252 per GiB-hour; Fly.io Sprites: $0.000683 per GiB-hour
Free tier: Cloudflare Sandbox: None; Fly.io Sprites: $30 trial credit
Paid plan from: Cloudflare Sandbox: $5 / month; Fly.io Sprites: Pay as you go
Isolation: Cloudflare Sandbox: Firecracker microVM; Fly.io Sprites: MicroVM
SDKs: Cloudflare Sandbox: TypeScript; Fly.io Sprites: Python, JavaScript / TypeScript, Go

Full comparison

18 fields, at each provider's list price

Cloudflare Sandboxdevelopers.cloudflare.com/containers/platform/pricingdevelopers.cloudflare.com

Fly.io Spritesfly.io/pricing

Pricing

vCPU, per hour: Cloudflare Sandbox: $0.072; Fly.io Sprites: $0.0385
RAM, per GiB-hour: Cloudflare Sandbox: $0.009; Fly.io Sprites: $0.021875
Storage: Cloudflare Sandbox: $0.000252 per GiB-hour; Fly.io Sprites: $0.000683 per GiB-hour
Free tier: Cloudflare Sandbox: None; Fly.io Sprites: $30 trial credit
Paid plan from: Cloudflare Sandbox: $5 / month; Fly.io Sprites: Pay as you go
Billing: Cloudflare Sandbox: Active CPU time only; Fly.io Sprites: Active CPU time only

Limits

Max session: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed
Idle stop: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed
Largest sandbox: Cloudflare Sandbox: 4 vCPU · 12 GiB; Fly.io Sprites: Not listed
Concurrent sandboxes: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed

Platform

Isolation: Cloudflare Sandbox: Firecracker microVM; Fly.io Sprites: MicroVM
GPU: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed
Snapshots: Cloudflare Sandbox:; Fly.io Sprites:
Pause and resume: Cloudflare Sandbox: Not listed; Fly.io Sprites:

Developer

SDKs: Cloudflare Sandbox: TypeScript; Fly.io Sprites: Python, JavaScript / TypeScript, Go
Integrations: Cloudflare Sandbox: Not listed; Fly.io Sprites: MCP, OpenAI Agents SDK

Trust

License: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed
BYOC: Cloudflare Sandbox: Not listed; Fly.io Sprites: Not listed

Hourly cost

One sandbox running for one hour

Size

Cloudflare Sandbox

Fly.io Sprites

1 vCPU · 2 GiB: Cloudflare Sandbox: $0.090; Fly.io Sprites: $0.082
2 vCPU · 4 GiB: Cloudflare Sandbox: $0.180; Fly.io Sprites: $0.165
4 vCPU · 8 GiB: Cloudflare Sandbox: $0.360; Fly.io Sprites: $0.329

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Fly.io Sprites fits when

You want to pay only for usage, with no plan fee.
You use MCP or the OpenAI Agents SDK.
You want the lower list price: $0.165 against $0.180 an hour for 2 vCPU and 4 GiB.
You want to start without paying.

More comparisons

See all comparisons

Cloudflare Sandbox

Fly.io Sprites

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Fly.io Sprites fits when

More comparisons

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