Cloudflare Sandbox vs Phonebox
Cloudflare Sandbox costs $0.072 per vCPU-hour. Cloudflare Sandbox runs Firecracker microVMs. Phonebox limits a session to 3 hours.
Updated
Cloudflare Sandbox
- Isolation
- Firecracker microVM
- Free tier
- None
- Max session
- Not listed
Phonebox
- Isolation
- Not listed
- Free tier
- $2 starter credit, one time, no card
- Max session
- 3 hours
What is different
4 fields differ. The rest are the same or not listed.
Cloudflare Sandbox
Phonebox
- Free tier
- Cloudflare Sandbox: None
- Phonebox: $2 starter credit, one time, no card
- Paid plan from
- Cloudflare Sandbox: $5 / month
- Phonebox: Pay as you go
- Billing
- Cloudflare Sandbox: Active CPU time only
- Phonebox: Bundled machine time
- Integrations
- Cloudflare Sandbox: Claude Code, OpenAI Agents SDK
- Phonebox: MCP
Full comparison
18 fields, at each provider's list price
Cloudflare Sandboxdevelopers
Phoneboxphonebox
Pricing
- vCPU, per hour
- Cloudflare Sandbox: $0.072
- Phonebox: Not listed
- RAM, per GiB-hour
- Cloudflare Sandbox: $0.009
- Phonebox: Not listed
- Storage
- Cloudflare Sandbox: $0.000252 per GiB-hour
- Phonebox: Not listed
- Free tier
- Cloudflare Sandbox: None
- Phonebox: $2 starter credit, one time, no card
- Paid plan from
- Cloudflare Sandbox: $5 / month
- Phonebox: Pay as you go
- Billing
- Cloudflare Sandbox: Active CPU time only
- Phonebox: Bundled machine time
Limits
- Max session
- Cloudflare Sandbox: Not listed
- Phonebox: 3 hours
- Idle stop
- Cloudflare Sandbox: Not listed
- Phonebox: After 5 minutes
- Largest sandbox
- Cloudflare Sandbox: 4 vCPU · 12 GiB
- Phonebox: Not listed
- Concurrent sandboxes
- Cloudflare Sandbox: Not listed
- Phonebox: Up to 5
Platform
- Isolation
- Cloudflare Sandbox: Firecracker microVM
- Phonebox: Not listed
- GPU
- Cloudflare Sandbox: Not listed
- Phonebox: Not listed
- Snapshots
- Cloudflare Sandbox:
- Phonebox: Not listed
- Pause and resume
- Cloudflare Sandbox: Not listed
- Phonebox:
Developer
- SDKs
- Cloudflare Sandbox: TypeScript
- Phonebox: TypeScript
- Integrations
- Cloudflare Sandbox: Claude Code, OpenAI Agents SDK
- Phonebox: MCP
Trust
- License
- Cloudflare Sandbox: Not listed
- Phonebox: Not listed
- BYOC
- Cloudflare Sandbox: Not listed
- Phonebox: Not listed
Hourly cost
One sandbox running for one hour
Cloudflare Sandbox
Phonebox
- 1 vCPU · 2 GiB
- Cloudflare Sandbox: $0.090
- Phonebox: Not listed
- 2 vCPU · 4 GiB
- Cloudflare Sandbox: $0.180
- Phonebox: Not listed
- 4 vCPU · 8 GiB
- Cloudflare Sandbox: $0.360
- Phonebox: Not listed
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Cloudflare Sandbox fits when
- You use Claude Code or the OpenAI Agents SDK.
- You need snapshots.
- Your code waits a lot: CPU is billed only while it is in use.
Phonebox fits when
- You want to pay only for usage, with no plan fee.
- You use MCP.
- You want to start without paying.
- You need pause and resume.
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