Buddy Sandboxes vs Fly.io Sprites
Buddy Sandboxes costs $0.0144 per vCPU-hour and Fly.io Sprites costs $0.0385 per vCPU-hour. Buddy Sandboxes runs full VMs and has no session limit. Fly.io Sprites runs Firecracker microVMs.
Updated
Buddy Sandboxes
- Isolation
- Full VM
- Free tier
- $1 of usage credit every month
- Max session
- No limit
Fly.io Sprites
- Isolation
- Firecracker microVM
- Free tier
- $30 trial credit
- Max session
- Not listed
What is different
9 fields differ. The rest are the same or not listed.
Buddy Sandboxes
Fly.io Sprites
- vCPU, per hour
- Buddy Sandboxes: $0.0144
- Fly.io Sprites: $0.0385
- RAM, per GiB-hour
- Buddy Sandboxes: $0.0144
- Fly.io Sprites: $0.021875
- Storage
- Buddy Sandboxes: $0.00011 per GiB-hour
- Fly.io Sprites: $0.000683 per GiB-hour
- Free tier
- Buddy Sandboxes: $1 of usage credit every month
- Fly.io Sprites: $30 trial credit
- Paid plan from
- Buddy Sandboxes: $29 / month
- Fly.io Sprites: Pay as you go
- Billing
- Buddy Sandboxes: Per second
- Fly.io Sprites: Active CPU time only
- Isolation
- Buddy Sandboxes: Full VM
- Fly.io Sprites: Firecracker microVM
- SDKs
- Buddy Sandboxes: TypeScript
- Fly.io Sprites: Python, JavaScript / TypeScript, Go
- Integrations
- Buddy Sandboxes: MCP, Claude Code
- Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code
Full comparison
18 fields, at each provider's list price
Buddy Sandboxesbuddy
Fly.io Spritesfly
Pricing
- vCPU, per hour
- Buddy Sandboxes: $0.0144
- Fly.io Sprites: $0.0385
- RAM, per GiB-hour
- Buddy Sandboxes: $0.0144
- Fly.io Sprites: $0.021875
- Storage
- Buddy Sandboxes: $0.00011 per GiB-hour
- Fly.io Sprites: $0.000683 per GiB-hour
- Free tier
- Buddy Sandboxes: $1 of usage credit every month
- Fly.io Sprites: $30 trial credit
- Paid plan from
- Buddy Sandboxes: $29 / month
- Fly.io Sprites: Pay as you go
- Billing
- Buddy Sandboxes: Per second
- Fly.io Sprites: Active CPU time only
Limits
- Max session
- Buddy Sandboxes: No limit
- Fly.io Sprites: Not listed
- Idle stop
- Buddy Sandboxes: Not listed
- Fly.io Sprites: Not listed
- Largest sandbox
- Buddy Sandboxes: 12 vCPU · 24 GiB
- Fly.io Sprites: Not listed
- Concurrent sandboxes
- Buddy Sandboxes: Not listed
- Fly.io Sprites: Not listed
Platform
- Isolation
- Buddy Sandboxes: Full VM
- Fly.io Sprites: Firecracker microVM
- GPU
- Buddy Sandboxes: Not listed
- Fly.io Sprites: Not listed
- Snapshots
- Buddy Sandboxes:
- Fly.io Sprites:
- Pause and resume
- Buddy Sandboxes:
- Fly.io Sprites:
Developer
- SDKs
- Buddy Sandboxes: TypeScript
- Fly.io Sprites: Python, JavaScript / TypeScript, Go
- Integrations
- Buddy Sandboxes: MCP, Claude Code
- Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code
Trust
- License
- Buddy Sandboxes: Not listed
- Fly.io Sprites: Not listed
- BYOC
- Buddy Sandboxes: Not listed
- Fly.io Sprites: Not listed
Hourly cost
One sandbox running for one hour
Buddy Sandboxes
Fly.io Sprites
- 1 vCPU · 2 GiB
- Buddy Sandboxes: $0.043
- Fly.io Sprites: $0.082
- 2 vCPU · 4 GiB
- Buddy Sandboxes: $0.086
- Fly.io Sprites: $0.165
- 4 vCPU · 8 GiB
- Buddy Sandboxes: $0.173
- Fly.io Sprites: $0.329
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Buddy Sandboxes fits when
- You want each sandbox to be a full VM.
- You want the lower list price: $0.086 against $0.165 an hour for 2 vCPU and 4 GiB.
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 larger free credit: $30 against $1.
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