Phonebox vs Vercel Sandbox
Vercel Sandbox costs $0.128 per vCPU-hour. Phonebox limits a session to 3 hours. Vercel Sandbox runs Firecracker microVMs and limits a session to 24 hours.
Updated
Phonebox
- Isolation
- Not listed
- Free tier
- $2 starter credit, one time, no card
- Max session
- 3 hours
Vercel Sandbox
- Isolation
- Firecracker microVM
- Free tier
- 5 CPU-hours every month
- Max session
- 24 hours
What is different
7 fields differ. The rest are the same or not listed.
Phonebox
Vercel Sandbox
- Free tier
- Phonebox: $2 starter credit, one time, no card
- Vercel Sandbox: 5 CPU-hours every month
- Paid plan from
- Phonebox: Pay as you go
- Vercel Sandbox: $20 / month
- Billing
- Phonebox: Bundled machine time
- Vercel Sandbox: Active CPU time only
- Max session
- Phonebox: 3 hours
- Vercel Sandbox: 24 hours
- Concurrent sandboxes
- Phonebox: Up to 5
- Vercel Sandbox: Up to 10,000
- SDKs
- Phonebox: TypeScript
- Vercel Sandbox: Python, JavaScript / TypeScript
- Integrations
- Phonebox: MCP
- Vercel Sandbox: Claude Agent SDK, LangChain, OpenAI Agents SDK, Vercel AI SDK, Claude Code
Full comparison
18 fields, at each provider's list price
Phoneboxphonebox
Vercel Sandboxvercel
Pricing
- vCPU, per hour
- Phonebox: Not listed
- Vercel Sandbox: $0.128
- RAM, per GiB-hour
- Phonebox: Not listed
- Vercel Sandbox: $0.0212
- Storage
- Phonebox: Not listed
- Vercel Sandbox: On Pro, snapshots $0.08 per GB-month and drives $0.05 per GB-month (beta).
- Free tier
- Phonebox: $2 starter credit, one time, no card
- Vercel Sandbox: 5 CPU-hours every month
- Paid plan from
- Phonebox: Pay as you go
- Vercel Sandbox: $20 / month
- Billing
- Phonebox: Bundled machine time
- Vercel Sandbox: Active CPU time only
Limits
- Max session
- Phonebox: 3 hours
- Vercel Sandbox: 24 hours
- Idle stop
- Phonebox: After 5 minutes
- Vercel Sandbox: Not listed
- Largest sandbox
- Phonebox: Not listed
- Vercel Sandbox: 8 vCPU · 16 GiB
- Concurrent sandboxes
- Phonebox: Up to 5
- Vercel Sandbox: Up to 10,000
Platform
- Isolation
- Phonebox: Not listed
- Vercel Sandbox: Firecracker microVM
- GPU
- Phonebox: Not listed
- Vercel Sandbox: Not listed
- Snapshots
- Phonebox: Not listed
- Vercel Sandbox:
- Pause and resume
- Phonebox:
- Vercel Sandbox:
Developer
- SDKs
- Phonebox: TypeScript
- Vercel Sandbox: Python, JavaScript / TypeScript
- Integrations
- Phonebox: MCP
- Vercel Sandbox: Claude Agent SDK, LangChain, OpenAI Agents SDK, Vercel AI SDK, Claude Code
Trust
- License
- Phonebox: Not listed
- Vercel Sandbox: Not listed
- BYOC
- Phonebox: Not listed
- Vercel Sandbox: Not listed
Hourly cost
One sandbox running for one hour
Phonebox
Vercel Sandbox
- 1 vCPU · 2 GiB
- Phonebox: Not listed
- Vercel Sandbox: $0.170
- 2 vCPU · 4 GiB
- Phonebox: Not listed
- Vercel Sandbox: $0.341
- 4 vCPU · 8 GiB
- Phonebox: Not listed
- Vercel Sandbox: $0.682
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Phonebox fits when
- You want to pay only for usage, with no plan fee.
- You use MCP.
Vercel Sandbox fits when
- A session must run longer than 3 hours.
- You use the Claude Agent SDK, LangChain, the OpenAI Agents SDK, the Vercel AI SDK or Claude Code.
- You need snapshots.
- Your code waits a lot: CPU is billed only while it is in use.
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