Fly.io Sprites vs Sandbox0

Fly.io Sprites costs $0.0385 per vCPU-hour. Sandbox0 bills memory only, at $0.015 per GiB-hour. Fly.io Sprites runs microVMs. Sandbox0 runs gVisor and has no session limit.

Updated Oct 14, 2026

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

Sandbox0

Long-running agent sandboxes with durable storage.

Isolation: gVisor
Free tier: Not listed
Max session: No limit

Visit site Sandbox0 profile

What is different

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

Field

Fly.io Sprites

Sandbox0

vCPU, per hour: Fly.io Sprites: $0.0385; Sandbox0: Included
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Sandbox0: $0.015
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Sandbox0: Free
Billing: Fly.io Sprites: Active CPU time only; Sandbox0: Memory only
Isolation: Fly.io Sprites: MicroVM; Sandbox0: gVisor
SDKs: Fly.io Sprites: Python, JavaScript / TypeScript, Go; Sandbox0: Go, Python, TypeScript
Integrations: Fly.io Sprites: MCP, OpenAI Agents SDK; Sandbox0: LangChain, OpenAI Agents SDK

Full comparison

18 fields, at each provider's list price

Fly.io Spritesfly.io/pricing

Sandbox0sandbox0.ai/pricingsandbox0.ai

Pricing

vCPU, per hour: Fly.io Sprites: $0.0385; Sandbox0: Included
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Sandbox0: $0.015
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Sandbox0: Free
Free tier: Fly.io Sprites: $30 trial credit; Sandbox0: Not listed
Paid plan from: Fly.io Sprites: Pay as you go; Sandbox0: Pay as you go
Billing: Fly.io Sprites: Active CPU time only; Sandbox0: Memory only

Limits

Max session: Fly.io Sprites: Not listed; Sandbox0: No limit
Idle stop: Fly.io Sprites: Not listed; Sandbox0: Not listed
Largest sandbox: Fly.io Sprites: Not listed; Sandbox0: Not listed
Concurrent sandboxes: Fly.io Sprites: Not listed; Sandbox0: Up to 20

Platform

Isolation: Fly.io Sprites: MicroVM; Sandbox0: gVisor
GPU: Fly.io Sprites: Not listed; Sandbox0: Not listed
Snapshots: Fly.io Sprites:; Sandbox0:
Pause and resume: Fly.io Sprites:; Sandbox0:

Developer

SDKs: Fly.io Sprites: Python, JavaScript / TypeScript, Go; Sandbox0: Go, Python, TypeScript
Integrations: Fly.io Sprites: MCP, OpenAI Agents SDK; Sandbox0: LangChain, OpenAI Agents SDK

Trust

License: Fly.io Sprites: Not listed; Sandbox0: Apache-2.0
BYOC: Fly.io Sprites: Not listed; Sandbox0: Not listed

Hourly cost

One sandbox running for one hour

Size

Fly.io Sprites

Sandbox0

1 vCPU · 2 GiB: Fly.io Sprites: $0.082; Sandbox0: $0.030
2 vCPU · 4 GiB: Fly.io Sprites: $0.165; Sandbox0: $0.060
4 vCPU · 8 GiB: Fly.io Sprites: $0.329; Sandbox0: $0.120

Compute only, at list rates.

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Which one fits

Based on the fields above

Fly.io Sprites fits when

You want each sandbox in its own microVM.
You use MCP.
Your code waits a lot: CPU is billed only while it is in use.

Sandbox0 fits when

You want an open-source platform (Apache-2.0) that you can self-host.
You use LangChain.
You want the lower list price: $0.060 against $0.165 an hour for 2 vCPU and 4 GiB.
You want one rate for memory, with CPU included.

More comparisons

See all comparisons

Fly.io Sprites

Sandbox0

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Fly.io Sprites fits when

Sandbox0 fits when

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