Fly.io Sprites vs Prime Sandboxes
Fly.io Sprites costs $0.0385 per vCPU-hour and Prime Sandboxes costs $0.02 per vCPU-hour. Fly.io Sprites runs microVMs. Prime Sandboxes runs microVMs and has no session limit.
Updated
Fly.io Sprites
- Isolation
- MicroVM
- Free tier
- $30 trial credit
- Max session
- Not listed
Prime Sandboxes
- Isolation
- 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
Prime Sandboxes
- vCPU, per hour
- Fly.io Sprites: $0.0385
- Prime Sandboxes: $0.02
- RAM, per GiB-hour
- Fly.io Sprites: $0.021875
- Prime Sandboxes: $0.0125
- Storage
- Fly.io Sprites: $0.000683 per GiB-hour
- Prime Sandboxes: $0.0002 per GiB-hour
- Billing
- Fly.io Sprites: Active CPU time only
- Prime Sandboxes: Per second
- SDKs
- Fly.io Sprites: Python, JavaScript / TypeScript, Go
- Prime Sandboxes: Python
Full comparison
18 fields, at each provider's list price
Fly.io Spritesfly
Prime Sandboxesdocs
Pricing
- vCPU, per hour
- Fly.io Sprites: $0.0385
- Prime Sandboxes: $0.02
- RAM, per GiB-hour
- Fly.io Sprites: $0.021875
- Prime Sandboxes: $0.0125
- Storage
- Fly.io Sprites: $0.000683 per GiB-hour
- Prime Sandboxes: $0.0002 per GiB-hour
- Free tier
- Fly.io Sprites: $30 trial credit
- Prime Sandboxes: Not listed
- Paid plan from
- Fly.io Sprites: Pay as you go
- Prime Sandboxes: Pay as you go
- Billing
- Fly.io Sprites: Active CPU time only
- Prime Sandboxes: Per second
Limits
- Max session
- Fly.io Sprites: Not listed
- Prime Sandboxes: No limit
- Idle stop
- Fly.io Sprites: Not listed
- Prime Sandboxes: Not listed
- Largest sandbox
- Fly.io Sprites: Not listed
- Prime Sandboxes: 16 vCPU · 64 GiB
- Concurrent sandboxes
- Fly.io Sprites: Not listed
- Prime Sandboxes: Up to 1,024
Platform
- Isolation
- Fly.io Sprites: MicroVM
- Prime Sandboxes: MicroVM
- GPU
- Fly.io Sprites: Not listed
- Prime Sandboxes: Not listed
- Snapshots
- Fly.io Sprites:
- Prime Sandboxes:
- Pause and resume
- Fly.io Sprites:
- Prime Sandboxes: Not listed
Developer
- SDKs
- Fly.io Sprites: Python, JavaScript / TypeScript, Go
- Prime Sandboxes: Python
- Integrations
- Fly.io Sprites: MCP, OpenAI Agents SDK
- Prime Sandboxes: Not listed
Trust
- License
- Fly.io Sprites: Not listed
- Prime Sandboxes: Not listed
- BYOC
- Fly.io Sprites: Not listed
- Prime Sandboxes: Not listed
Hourly cost
One sandbox running for one hour
Fly.io Sprites
Prime Sandboxes
- 1 vCPU · 2 GiB
- Fly.io Sprites: $0.082
- Prime Sandboxes: $0.045
- 2 vCPU · 4 GiB
- Fly.io Sprites: $0.165
- Prime Sandboxes: $0.090
- 4 vCPU · 8 GiB
- Fly.io Sprites: $0.329
- Prime Sandboxes: $0.180
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.
- You need pause and resume.
- Your code waits a lot: CPU is billed only while it is in use.
Prime Sandboxes fits when
- You want the lower list price: $0.090 against $0.165 an hour for 2 vCPU and 4 GiB.
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