Fly.io Sprites vs Shellbox
Fly.io Sprites costs $0.0385 per vCPU-hour and Shellbox costs $0.01 per vCPU-hour. Fly.io Sprites runs Firecracker microVMs. Shellbox runs Firecracker microVMs and has no session limit.
Updated
Fly.io Sprites
- Isolation
- Firecracker microVM
- Free tier
- $30 trial credit
- Max session
- Not listed
Shellbox
- Isolation
- Firecracker microVM
- Free tier
- Not listed
- Max session
- No limit
What is different
5 fields differ. The rest are the same or not listed.
Fly.io Sprites
Shellbox
- vCPU, per hour
- Fly.io Sprites: $0.0385
- Shellbox: $0.01
- RAM, per GiB-hour
- Fly.io Sprites: $0.021875
- Shellbox: Included
- Storage
- Fly.io Sprites: $0.000683 per GiB-hour
- Shellbox: A stopped box costs $0.50 per x1 slot per month
- Billing
- Fly.io Sprites: Active CPU time only
- Shellbox: Bundled machine time
- Integrations
- Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code
- Shellbox: Claude Code
Full comparison
18 fields, at each provider's list price
Fly.io Spritesfly
Shellboxshellbox
Pricing
- vCPU, per hour
- Fly.io Sprites: $0.0385
- Shellbox: $0.01
- RAM, per GiB-hour
- Fly.io Sprites: $0.021875
- Shellbox: Included
- Storage
- Fly.io Sprites: $0.000683 per GiB-hour
- Shellbox: A stopped box costs $0.50 per x1 slot per month
- Free tier
- Fly.io Sprites: $30 trial credit
- Shellbox: Not listed
- Paid plan from
- Fly.io Sprites: Pay as you go
- Shellbox: Pay as you go
- Billing
- Fly.io Sprites: Active CPU time only
- Shellbox: Bundled machine time
Limits
- Max session
- Fly.io Sprites: Not listed
- Shellbox: No limit
- Idle stop
- Fly.io Sprites: Not listed
- Shellbox: After 2 minutes
- Largest sandbox
- Fly.io Sprites: Not listed
- Shellbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Fly.io Sprites: Not listed
- Shellbox: Up to 16
Platform
- Isolation
- Fly.io Sprites: Firecracker microVM
- Shellbox: Firecracker microVM
- GPU
- Fly.io Sprites: Not listed
- Shellbox: Not listed
- Snapshots
- Fly.io Sprites:
- Shellbox:
- Pause and resume
- Fly.io Sprites:
- Shellbox:
Developer
- SDKs
- Fly.io Sprites: Python, JavaScript / TypeScript, Go
- Shellbox: Not listed
- Integrations
- Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code
- Shellbox: Claude Code
Trust
- License
- Fly.io Sprites: Not listed
- Shellbox: Not listed
- BYOC
- Fly.io Sprites: Not listed
- Shellbox: Not listed
Hourly cost
One sandbox running for one hour
Fly.io Sprites
Shellbox
- 1 vCPU · 2 GiB
- Fly.io Sprites: $0.082
- Shellbox: $0.010
- 2 vCPU · 4 GiB
- Fly.io Sprites: $0.165
- Shellbox: $0.020
- 4 vCPU · 8 GiB
- Fly.io Sprites: $0.329
- Shellbox: $0.040
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Fly.io Sprites fits when
- You use MCP or the OpenAI Agents SDK.
- Your code waits a lot: CPU is billed only while it is in use.
- You need SOC 2 Type II, HIPAA and GDPR.
Shellbox fits when
- You want the lower list price: $0.020 against $0.165 an hour for 2 vCPU and 4 GiB.
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