Fly.io Sprites vs Tenki Sandbox

Fly.io Sprites costs $0.0385 per vCPU-hour and Tenki Sandbox costs $0.0504 per vCPU-hour. Fly.io Sprites runs microVMs. Tenki Sandbox runs full VMs.

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

Tenki Sandbox

Disposable Linux VMs for AI agents, driven by SDK or CLI.

Isolation: Full VM
Free tier: $100 credit, one time
Max session: Not listed

Visit site Tenki Sandbox profile

What is different

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

Field

Fly.io Sprites

Tenki Sandbox

vCPU, per hour: Fly.io Sprites: $0.0385; Tenki Sandbox: $0.0504
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Tenki Sandbox: $0.0162
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Tenki Sandbox: $0.000108 per GiB-hour after 5 free GiB
Free tier: Fly.io Sprites: $30 trial credit; Tenki Sandbox: $100 credit, one time
Paid plan from: Fly.io Sprites: Pay as you go; Tenki Sandbox: $200 / month
Billing: Fly.io Sprites: Active CPU time only; Tenki Sandbox: Per second
Isolation: Fly.io Sprites: MicroVM; Tenki Sandbox: Full VM
SDKs: Fly.io Sprites: Python, JavaScript / TypeScript, Go; Tenki Sandbox: Python, TypeScript, Go
Integrations: Fly.io Sprites: MCP, OpenAI Agents SDK; Tenki Sandbox: MCP

Full comparison

18 fields, at each provider's list price

Fly.io Spritesfly.io/pricing

Tenki Sandboxtenki.cloud/pricingtenki.cloud

Pricing

vCPU, per hour: Fly.io Sprites: $0.0385; Tenki Sandbox: $0.0504
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Tenki Sandbox: $0.0162
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Tenki Sandbox: $0.000108 per GiB-hour after 5 free GiB
Free tier: Fly.io Sprites: $30 trial credit; Tenki Sandbox: $100 credit, one time
Paid plan from: Fly.io Sprites: Pay as you go; Tenki Sandbox: $200 / month
Billing: Fly.io Sprites: Active CPU time only; Tenki Sandbox: Per second

Limits

Max session: Fly.io Sprites: Not listed; Tenki Sandbox: Not listed
Idle stop: Fly.io Sprites: Not listed; Tenki Sandbox: Not listed
Largest sandbox: Fly.io Sprites: Not listed; Tenki Sandbox: 16 vCPU · 64 GiB
Concurrent sandboxes: Fly.io Sprites: Not listed; Tenki Sandbox: Up to 100

Platform

Isolation: Fly.io Sprites: MicroVM; Tenki Sandbox: Full VM
GPU: Fly.io Sprites: Not listed; Tenki Sandbox: Not listed
Snapshots: Fly.io Sprites:; Tenki Sandbox:
Pause and resume: Fly.io Sprites:; Tenki Sandbox:

Developer

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

Trust

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

Hourly cost

One sandbox running for one hour

Size

Fly.io Sprites

Tenki Sandbox

1 vCPU · 2 GiB: Fly.io Sprites: $0.082; Tenki Sandbox: $0.083
2 vCPU · 4 GiB: Fly.io Sprites: $0.165; Tenki Sandbox: $0.166
4 vCPU · 8 GiB: Fly.io Sprites: $0.329; Tenki Sandbox: $0.331

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 want each sandbox in its own microVM.
You use the OpenAI Agents SDK.
You want the lower list price: $0.165 against $0.166 an hour for 2 vCPU and 4 GiB.

Tenki Sandbox fits when

You want each sandbox to be a full VM.
You want the larger free credit: $100 against $30.
You need a desktop in the sandbox.
You need SOC 2 Type II.

More comparisons

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Fly.io Sprites

Tenki Sandbox

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Fly.io Sprites fits when

Tenki Sandbox fits when

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