Runtime vs Sandbox as a Service
Runtime costs $0.025 per vCPU-hour and Sandbox as a Service costs $0.045 per vCPU-hour. Runtime runs Firecracker microVMs and has no session limit. Sandbox as a Service runs full VMs and limits a session to 24 hours.
Updated
Runtime
- Isolation
- Firecracker microVM
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Max session
- No limit
Sandbox as a Service
- Isolation
- Full VM
- Free tier
- $5 credit
- Max session
- 24 hours
What is different
10 fields differ. The rest are the same or not listed.
Runtime
Sandbox as a Service
- vCPU, per hour
- Runtime: $0.025
- Sandbox as a Service: $0.045
- RAM, per GiB-hour
- Runtime: $0.0075
- Sandbox as a Service: Included
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sandbox as a Service: $5 credit
- Billing
- Runtime: Active CPU time only
- Sandbox as a Service: Bundled machine time
- Max session
- Runtime: No limit
- Sandbox as a Service: 24 hours
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sandbox as a Service: 8 vCPU · 16 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sandbox as a Service: Up to 20
- Isolation
- Runtime: Firecracker microVM
- Sandbox as a Service: Full VM
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Sandbox as a Service: Python, JavaScript / TypeScript
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Sandbox as a Service: MCP
Full comparison
18 fields, at each provider's list price
Runtimewithruntime
Sandbox as a Servicesandbox-as-a-service
Pricing
- vCPU, per hour
- Runtime: $0.025
- Sandbox as a Service: $0.045
- RAM, per GiB-hour
- Runtime: $0.0075
- Sandbox as a Service: Included
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Sandbox as a Service: Not listed
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sandbox as a Service: $5 credit
- Paid plan from
- Runtime: Pay as you go
- Sandbox as a Service: Pay as you go
- Billing
- Runtime: Active CPU time only
- Sandbox as a Service: Bundled machine time
Limits
- Max session
- Runtime: No limit
- Sandbox as a Service: 24 hours
- Idle stop
- Runtime: After 5 minutes
- Sandbox as a Service: Not listed
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sandbox as a Service: 8 vCPU · 16 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sandbox as a Service: Up to 20
Platform
- Isolation
- Runtime: Firecracker microVM
- Sandbox as a Service: Full VM
- GPU
- Runtime: No
- Sandbox as a Service: Not listed
- Snapshots
- Runtime:
- Sandbox as a Service:
- Pause and resume
- Runtime:
- Sandbox as a Service: Not listed
Developer
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Sandbox as a Service: Python, JavaScript / TypeScript
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Sandbox as a Service: MCP
Trust
- License
- Runtime: Not listed
- Sandbox as a Service: Not listed
- BYOC
- Runtime: Not listed
- Sandbox as a Service: Not listed
Hourly cost
One sandbox running for one hour
Runtime
Sandbox as a Service
- 1 vCPU · 2 GiB
- Runtime: $0.040
- Sandbox as a Service: $0.045
- 2 vCPU · 4 GiB
- Runtime: $0.080
- Sandbox as a Service: $0.090
- 4 vCPU · 8 GiB
- Runtime: $0.160
- Sandbox as a Service: $0.180
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Runtime fits when
- A session must run longer than 24 hours.
- You want each sandbox in its own microVM.
- You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK, LangChain or Claude Code.
- You want the lower list price: $0.080 against $0.090 an hour for 2 vCPU and 4 GiB.
Sandbox as a Service fits when
- You want each sandbox to be a full VM.
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