Runtime vs Sendblue Sandboxes
Runtime costs $0.025 per vCPU-hour and Sendblue Sandboxes costs $0.165 per vCPU-hour. Runtime runs Firecracker microVMs and has no session limit. Sendblue Sandboxes runs containers.
Updated
Runtime
- Isolation
- Firecracker microVM
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Max session
- No limit
Sendblue Sandboxes
- Isolation
- Container
- Free tier
- $100 free compute, once per phone number
- Max session
- Not listed
What is different
9 fields differ. The rest are the same or not listed.
Runtime
Sendblue Sandboxes
- vCPU, per hour
- Runtime: $0.025
- Sendblue Sandboxes: $0.165
- RAM, per GiB-hour
- Runtime: $0.0075
- Sendblue Sandboxes: Included
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sendblue Sandboxes: $100 free compute, once per phone number
- Billing
- Runtime: Active CPU time only
- Sendblue Sandboxes: Bundled machine time
- Idle stop
- Runtime: After 5 minutes
- Sendblue Sandboxes: After 10 minutes
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sendblue Sandboxes: 2 vCPU · 8 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sendblue Sandboxes: Up to 5
- Isolation
- Runtime: Firecracker microVM
- Sendblue Sandboxes: Container
- Pause and resume
- Runtime:
- Sendblue Sandboxes: No
Full comparison
18 fields, at each provider's list price
Runtimewithruntime
Sendblue Sandboxessendblue
Pricing
- vCPU, per hour
- Runtime: $0.025
- Sendblue Sandboxes: $0.165
- RAM, per GiB-hour
- Runtime: $0.0075
- Sendblue Sandboxes: Included
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Sendblue Sandboxes: Not listed
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Sendblue Sandboxes: $100 free compute, once per phone number
- Paid plan from
- Runtime: Pay as you go
- Sendblue Sandboxes: Not listed
- Billing
- Runtime: Active CPU time only
- Sendblue Sandboxes: Bundled machine time
Limits
- Max session
- Runtime: No limit
- Sendblue Sandboxes: Not listed
- Idle stop
- Runtime: After 5 minutes
- Sendblue Sandboxes: After 10 minutes
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Sendblue Sandboxes: 2 vCPU · 8 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Sendblue Sandboxes: Up to 5
Platform
- Isolation
- Runtime: Firecracker microVM
- Sendblue Sandboxes: Container
- GPU
- Runtime: No
- Sendblue Sandboxes: Not listed
- Snapshots
- Runtime:
- Sendblue Sandboxes: Not listed
- Pause and resume
- Runtime:
- Sendblue Sandboxes: No
Developer
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Sendblue Sandboxes: Not listed
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Sendblue Sandboxes: Not listed
Trust
- License
- Runtime: Not listed
- Sendblue Sandboxes: Not listed
- BYOC
- Runtime: Not listed
- Sendblue Sandboxes: Not listed
Hourly cost
One sandbox running for one hour
Runtime
Sendblue Sandboxes
- 1 vCPU · 2 GiB
- Runtime: $0.040
- Sendblue Sandboxes: $0.165
- 2 vCPU · 4 GiB
- Runtime: $0.080
- Sendblue Sandboxes: $0.330
- 4 vCPU · 8 GiB
- Runtime: $0.160
- Sendblue Sandboxes: $0.660
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, MCP or Claude Code.
- You want the lower list price: $0.080 against $0.330 an hour for 2 vCPU and 4 GiB.
- You need snapshots.
Sendblue Sandboxes fits when
- You need SOC 2 Type II and HIPAA.
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