Freestyle VMs vs Sandbox0

Freestyle VMs costs $0.04032 per vCPU-hour. Sandbox0 bills memory only, at $0.015 per GiB-hour. Freestyle VMs runs full VMs. Sandbox0 runs gVisor and has no session limit.

Updated Oct 14, 2026

Freestyle VMs

Full Linux virtual machines for AI agents.

Isolation: Full VM
Free tier: Free plan, $0 forever
Max session: Not listed

Visit site Freestyle VMs profile

Sandbox0

Long-running agent sandboxes with durable storage.

Isolation: gVisor
Free tier: Not listed
Max session: No limit

Visit site Sandbox0 profile

What is different

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

Field

Freestyle VMs

Sandbox0

vCPU, per hour: Freestyle VMs: $0.04032; Sandbox0: Included
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sandbox0: $0.015
Storage: Freestyle VMs: $0.000086 per GiB-hour; Sandbox0: Free
Paid plan from: Freestyle VMs: $50 / month; Sandbox0: Pay as you go
Billing: Freestyle VMs: Per second; Sandbox0: Memory only
Concurrent sandboxes: Freestyle VMs: Up to 400; Sandbox0: Up to 20
Isolation: Freestyle VMs: Full VM; Sandbox0: gVisor
SDKs: Freestyle VMs: JavaScript; Sandbox0: Go, Python, TypeScript
Integrations: Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK; Sandbox0: LangChain, OpenAI Agents SDK

Full comparison

18 fields, at each provider's list price

Freestyle VMsfreestyle.sh/pricingfreestyle.sh

Sandbox0sandbox0.ai/pricingsandbox0.ai

Pricing

vCPU, per hour: Freestyle VMs: $0.04032; Sandbox0: Included
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sandbox0: $0.015
Storage: Freestyle VMs: $0.000086 per GiB-hour; Sandbox0: Free
Free tier: Freestyle VMs: Free plan, $0 forever; Sandbox0: Not listed
Paid plan from: Freestyle VMs: $50 / month; Sandbox0: Pay as you go
Billing: Freestyle VMs: Per second; Sandbox0: Memory only

Limits

Max session: Freestyle VMs: Not listed; Sandbox0: No limit
Idle stop: Freestyle VMs: Not listed; Sandbox0: Not listed
Largest sandbox: Freestyle VMs: 32 vCPU · 64 GiB; Sandbox0: Not listed
Concurrent sandboxes: Freestyle VMs: Up to 400; Sandbox0: Up to 20

Platform

Isolation: Freestyle VMs: Full VM; Sandbox0: gVisor
GPU: Freestyle VMs: Not listed; Sandbox0: Not listed
Snapshots: Freestyle VMs:; Sandbox0:
Pause and resume: Freestyle VMs:; Sandbox0:

Developer

SDKs: Freestyle VMs: JavaScript; Sandbox0: Go, Python, TypeScript
Integrations: Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK; Sandbox0: LangChain, OpenAI Agents SDK

Trust

License: Freestyle VMs: Not listed; Sandbox0: Apache-2.0
BYOC: Freestyle VMs: Not listed; Sandbox0: Not listed

Hourly cost

One sandbox running for one hour

Size

Freestyle VMs

Sandbox0

1 vCPU · 2 GiB: Freestyle VMs: $0.066; Sandbox0: $0.030
2 vCPU · 4 GiB: Freestyle VMs: $0.132; Sandbox0: $0.060
4 vCPU · 8 GiB: Freestyle VMs: $0.264; Sandbox0: $0.120

Compute only, at list rates.

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Which one fits

Based on the fields above

Freestyle VMs fits when

You want each sandbox to be a full VM.
You use the Claude Agent SDK.
You need a desktop in the sandbox.

Sandbox0 fits when

You want to pay only for usage, with no plan fee.
You want an open-source platform (Apache-2.0) that you can self-host.
You use LangChain.
You want the lower list price: $0.060 against $0.132 an hour for 2 vCPU and 4 GiB.

More comparisons

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Freestyle VMs

Sandbox0

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Freestyle VMs fits when

Sandbox0 fits when

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