Runtime vs Sailboxes
Runtime costs $0.025 per vCPU-hour and Sailboxes costs $0.015 per vCPU-hour. Runtime runs Firecracker microVMs and has no session limit. Sailboxes runs full VMs and has no session limit.
Updated
Runtime
- Isolation
- Firecracker microVM
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Max session
- No limit
Sailboxes
- Isolation
- Full VM
- Free tier
- $5 credit every month
- Max session
- No limit
What is different
10 fields differ. The rest are the same or not listed.
Runtime
Sailboxes
- vCPU, per hour
- Runtime: $0.025
- Sailboxes: $0.015
- RAM, per GiB-hour
- Runtime: $0.0075
- Sailboxes: $0.008
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Sailboxes: $0.0007 per GiB-hour
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sailboxes: $5 credit every month
- Billing
- Runtime: Active CPU time only
- Sailboxes: Per second
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sailboxes: 8 vCPU · 256 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sailboxes: Up to 5,000
- Isolation
- Runtime: Firecracker microVM
- Sailboxes: Full VM
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Sailboxes: Python, TypeScript, Rust
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Sailboxes: Claude Code
Full comparison
18 fields, at each provider's list price
Runtimewithruntime
Sailboxesdocs
Pricing
- vCPU, per hour
- Runtime: $0.025
- Sailboxes: $0.015
- RAM, per GiB-hour
- Runtime: $0.0075
- Sailboxes: $0.008
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Sailboxes: $0.0007 per GiB-hour
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sailboxes: $5 credit every month
- Paid plan from
- Runtime: Pay as you go
- Sailboxes: Pay as you go
- Billing
- Runtime: Active CPU time only
- Sailboxes: Per second
Limits
- Max session
- Runtime: No limit
- Sailboxes: No limit
- Idle stop
- Runtime: After 5 minutes
- Sailboxes: Not listed
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sailboxes: 8 vCPU · 256 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sailboxes: Up to 5,000
Platform
- Isolation
- Runtime: Firecracker microVM
- Sailboxes: Full VM
- GPU
- Runtime: No
- Sailboxes: Not listed
- Snapshots
- Runtime:
- Sailboxes:
- Pause and resume
- Runtime:
- Sailboxes:
Developer
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Sailboxes: Python, TypeScript, Rust
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Sailboxes: Claude Code
Trust
- License
- Runtime: Not listed
- Sailboxes: Not listed
- BYOC
- Runtime: Not listed
- Sailboxes: Not listed
Hourly cost
One sandbox running for one hour
Runtime
Sailboxes
- 1 vCPU · 2 GiB
- Runtime: $0.040
- Sailboxes: $0.031
- 2 vCPU · 4 GiB
- Runtime: $0.080
- Sailboxes: $0.062
- 4 vCPU · 8 GiB
- Runtime: $0.160
- Sailboxes: $0.124
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Runtime fits when
- You want each sandbox in its own microVM.
- You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK, LangChain or MCP.
- You need a desktop in the sandbox.
- Your code waits a lot: CPU is billed only while it is in use.
Sailboxes fits when
- You want each sandbox to be a full VM.
- You want the lower list price: $0.062 against $0.080 an hour for 2 vCPU and 4 GiB.
- You need SOC 2 Type II and HIPAA.
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