Shellbox vs Watasu

Shellbox costs $0.01 per vCPU-hour. Shellbox runs Firecracker microVMs and has no session limit. Watasu limits a session to 24 hours.

Updated Oct 23, 2026

Shellbox

Linux microVMs for developers and AI agents, made and controlled over SSH.

Isolation: Firecracker microVM
Free tier: Not listed
Max session: No limit

Visit site Shellbox 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

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

Field

Shellbox

Watasu

Storage: Shellbox: A stopped box costs $0.50 per x1 slot per month; Watasu: Retained disks €0.10 per GiB per month while the sandbox is stopped. Checkpoints and templates €0.03 per GiB per month.
Billing: Shellbox: Bundled machine time; Watasu: Per second
Max session: Shellbox: No limit; Watasu: 24 hours
Largest sandbox: Shellbox: 16 vCPU · 32 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Shellbox: Up to 16; Watasu: Up to 100
Integrations: Shellbox: Claude Code; Watasu: MCP, Claude Code

Full comparison

18 fields, at each provider's list price

Shellboxshellbox.dev/#pricingshellbox.dev

Watasuwatasu.io/pricing

Pricing

vCPU, per hour: Shellbox: $0.01; Watasu: Not listed
RAM, per GiB-hour: Shellbox: Included; Watasu: Not listed
Storage: Shellbox: A stopped box costs $0.50 per x1 slot per month; 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: Shellbox: Not listed; Watasu: Free Basic plan
Paid plan from: Shellbox: Pay as you go; Watasu: Not listed
Billing: Shellbox: Bundled machine time; Watasu: Per second

Limits

Max session: Shellbox: No limit; Watasu: 24 hours
Idle stop: Shellbox: After 2 minutes; Watasu: Not listed
Largest sandbox: Shellbox: 16 vCPU · 32 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Shellbox: Up to 16; Watasu: Up to 100

Platform

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

Developer

SDKs: Shellbox: Not listed; Watasu: Python, TypeScript, Rust
Integrations: Shellbox: Claude Code; Watasu: MCP, Claude Code

Trust

License: Shellbox: Not listed; Watasu: Not listed
BYOC: Shellbox: Not listed; Watasu: Not listed

Hourly cost

One sandbox running for one hour

Size

Shellbox

Watasu

1 vCPU · 2 GiB: Shellbox: $0.010; Watasu: Not listed
2 vCPU · 4 GiB: Shellbox: $0.020; Watasu: Not listed
4 vCPU · 8 GiB: Shellbox: $0.040; Watasu: Not listed

Compute only, at list rates.

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Which one fits

Based on the fields above

Shellbox fits when

A session must run longer than 24 hours.
You need a sandbox larger than 8 vCPU · 8 GiB.

Watasu fits when

You use MCP.

More comparisons

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Shellbox

Watasu

What is different

Full comparison

Pricing

Limits

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Developer

Trust

Hourly cost

Which one fits

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