Vercel Sandbox vs Watasu

Vercel Sandbox costs $0.128 per vCPU-hour. Vercel Sandbox runs Firecracker microVMs and limits a session to 24 hours. Watasu limits a session to 24 hours.

Updated Oct 15, 2026

Vercel Sandbox

Isolated Linux microVMs for running untrusted code.

Isolation: Firecracker microVM
Free tier: 5 CPU-hours every month
Max session: 24 hours

Visit site Vercel Sandbox profile

Watasu

Isolated Linux sandboxes for AI agents, hosted in the EU.

Isolation: Not listed
Free tier: Free Basic plan
Max session: 24 hours

Visit site Watasu profile

What is different

5 fields differ. The rest are the same or not listed.

Field

Vercel Sandbox

Watasu

Storage: Vercel Sandbox: On Pro, snapshots $0.08 per GB-month and drives $0.05 per GB-month (beta).; Watasu: Retained disks €0.10 per GiB per month while the sandbox is stopped. Checkpoints and templates €0.03 per GiB per month.
Free tier: Vercel Sandbox: 5 CPU-hours every month; Watasu: Free Basic plan
Billing: Vercel Sandbox: Active CPU time only; Watasu: Per second
Largest sandbox: Vercel Sandbox: 8 vCPU · 16 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Vercel Sandbox: Up to 10,000; Watasu: Up to 100

Full comparison

18 fields, at each provider's list price

Vercel Sandboxvercel.com/docs/sandbox/pricingvercel.com

Watasuwatasu.io/pricing

Pricing

vCPU, per hour: Vercel Sandbox: $0.128; Watasu: Not listed
RAM, per GiB-hour: Vercel Sandbox: $0.0212; Watasu: Not listed
Storage: Vercel Sandbox: On Pro, snapshots $0.08 per GB-month and drives $0.05 per GB-month (beta).; Watasu: Retained disks €0.10 per GiB per month while the sandbox is stopped. Checkpoints and templates €0.03 per GiB per month.
Free tier: Vercel Sandbox: 5 CPU-hours every month; Watasu: Free Basic plan
Paid plan from: Vercel Sandbox: $20 / month; Watasu: Not listed
Billing: Vercel Sandbox: Active CPU time only; Watasu: Per second

Limits

Max session: Vercel Sandbox: 24 hours; Watasu: 24 hours
Idle stop: Vercel Sandbox: Not listed; Watasu: Not listed
Largest sandbox: Vercel Sandbox: 8 vCPU · 16 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Vercel Sandbox: Up to 10,000; Watasu: Up to 100

Platform

Isolation: Vercel Sandbox: Firecracker microVM; Watasu: Not listed
GPU: Vercel Sandbox: Not listed; Watasu: Not listed
Snapshots: Vercel Sandbox:; Watasu:
Pause and resume: Vercel Sandbox:; Watasu:

Developer

SDKs: Vercel Sandbox: Python, JavaScript / TypeScript; Watasu: Not listed
Integrations: Vercel Sandbox: Claude Agent SDK, LangChain, OpenAI Agents SDK, Vercel AI SDK, Claude Code; Watasu: Not listed

Trust

License: Vercel Sandbox: Not listed; Watasu: Not listed
BYOC: Vercel Sandbox: Not listed; Watasu: Not listed

Hourly cost

One sandbox running for one hour

Size

Vercel Sandbox

Watasu

1 vCPU · 2 GiB: Vercel Sandbox: $0.170; Watasu: Not listed
2 vCPU · 4 GiB: Vercel Sandbox: $0.341; Watasu: Not listed
4 vCPU · 8 GiB: Vercel Sandbox: $0.682; Watasu: Not listed

Compute only, at list rates.

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Which one fits

Based on the fields above

Vercel Sandbox fits when

You use the Claude Agent SDK, LangChain, the OpenAI Agents SDK, the Vercel AI SDK or Claude Code.
Your code waits a lot: CPU is billed only while it is in use.
You need a sandbox larger than 8 vCPU · 8 GiB.
You need SOC 2 Type II.

More comparisons

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Vercel Sandbox

Watasu

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Vercel Sandbox fits when

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