Sendblue Sandboxes vs Shellbox
Sendblue Sandboxes costs $0.165 per vCPU-hour and Shellbox costs $0.01 per vCPU-hour. Sendblue Sandboxes runs containers. Shellbox runs Firecracker microVMs and has no session limit.
Updated
Sendblue Sandboxes
- Isolation
- Container
- Free tier
- $100 free compute, once per phone number
- Max session
- Not listed
Shellbox
- Isolation
- Firecracker microVM
- Free tier
- Not listed
- Max session
- No limit
What is different
6 fields differ. The rest are the same or not listed.
Sendblue Sandboxes
Shellbox
- vCPU, per hour
- Sendblue Sandboxes: $0.165
- Shellbox: $0.01
- Idle stop
- Sendblue Sandboxes: After 10 minutes
- Shellbox: After 2 minutes
- Largest sandbox
- Sendblue Sandboxes: 2 vCPU · 8 GiB
- Shellbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Sendblue Sandboxes: Up to 5
- Shellbox: Up to 16
- Isolation
- Sendblue Sandboxes: Container
- Shellbox: Firecracker microVM
- Pause and resume
- Sendblue Sandboxes: No
- Shellbox:
Full comparison
18 fields, at each provider's list price
Sendblue Sandboxessendblue
Shellboxshellbox
Pricing
- vCPU, per hour
- Sendblue Sandboxes: $0.165
- Shellbox: $0.01
- RAM, per GiB-hour
- Sendblue Sandboxes: Included
- Shellbox: Included
- Storage
- Sendblue Sandboxes: Not listed
- Shellbox: A stopped box costs $0.50 per x1 slot per month
- Free tier
- Sendblue Sandboxes: $100 free compute, once per phone number
- Shellbox: Not listed
- Paid plan from
- Sendblue Sandboxes: Not listed
- Shellbox: Pay as you go
- Billing
- Sendblue Sandboxes: Bundled machine time
- Shellbox: Bundled machine time
Limits
- Max session
- Sendblue Sandboxes: Not listed
- Shellbox: No limit
- Idle stop
- Sendblue Sandboxes: After 10 minutes
- Shellbox: After 2 minutes
- Largest sandbox
- Sendblue Sandboxes: 2 vCPU · 8 GiB
- Shellbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Sendblue Sandboxes: Up to 5
- Shellbox: Up to 16
Platform
- Isolation
- Sendblue Sandboxes: Container
- Shellbox: Firecracker microVM
- GPU
- Sendblue Sandboxes: Not listed
- Shellbox: Not listed
- Snapshots
- Sendblue Sandboxes: Not listed
- Shellbox:
- Pause and resume
- Sendblue Sandboxes: No
- Shellbox:
Developer
- SDKs
- Sendblue Sandboxes: Not listed
- Shellbox: Not listed
- Integrations
- Sendblue Sandboxes: Not listed
- Shellbox: Claude Code
Trust
- License
- Sendblue Sandboxes: Not listed
- Shellbox: Not listed
- BYOC
- Sendblue Sandboxes: Not listed
- Shellbox: Not listed
Hourly cost
One sandbox running for one hour
Sendblue Sandboxes
Shellbox
- 1 vCPU · 2 GiB
- Sendblue Sandboxes: $0.165
- Shellbox: $0.010
- 2 vCPU · 4 GiB
- Sendblue Sandboxes: $0.330
- Shellbox: $0.020
- 4 vCPU · 8 GiB
- Sendblue Sandboxes: $0.660
- Shellbox: $0.040
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Sendblue Sandboxes fits when
- You need SOC 2 Type II and HIPAA.
Shellbox fits when
- You want each sandbox in its own microVM.
- You use Claude Code.
- You want the lower list price: $0.020 against $0.330 an hour for 2 vCPU and 4 GiB.
- You need snapshots.
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