Freestyle VMs vs Sailboxes

Freestyle VMs costs $0.04032 per vCPU-hour and Sailboxes costs $0.015 per vCPU-hour. Freestyle VMs runs full VMs. Sailboxes runs full VMs 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

Sailboxes

Persistent Linux VMs for long-horizon AI agents.

Isolation: Full VM
Free tier: $5 credit every month
Max session: No limit

Visit site Sailboxes profile

What is different

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

Field

Freestyle VMs

Sailboxes

vCPU, per hour: Freestyle VMs: $0.04032; Sailboxes: $0.015
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sailboxes: $0.008
Storage: Freestyle VMs: $0.000086 per GiB-hour; Sailboxes: $0.0007 per GiB-hour
Free tier: Freestyle VMs: Free plan, $0 forever; Sailboxes: $5 credit every month
Paid plan from: Freestyle VMs: $50 / month; Sailboxes: Pay as you go
Concurrent sandboxes: Freestyle VMs: Up to 400; Sailboxes: Up to 5,000
SDKs: Freestyle VMs: JavaScript; Sailboxes: Python, TypeScript, Rust

Full comparison

18 fields, at each provider's list price

Freestyle VMsfreestyle.sh/pricingfreestyle.sh

Sailboxesdocs.sailresearch.com/sailboxes-pricingdocs.sailresearch.com

Pricing

vCPU, per hour: Freestyle VMs: $0.04032; Sailboxes: $0.015
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sailboxes: $0.008
Storage: Freestyle VMs: $0.000086 per GiB-hour; Sailboxes: $0.0007 per GiB-hour
Free tier: Freestyle VMs: Free plan, $0 forever; Sailboxes: $5 credit every month
Paid plan from: Freestyle VMs: $50 / month; Sailboxes: Pay as you go
Billing: Freestyle VMs: Per second; Sailboxes: Per second

Limits

Max session: Freestyle VMs: Not listed; Sailboxes: No limit
Idle stop: Freestyle VMs: Not listed; Sailboxes: Not listed
Largest sandbox: Freestyle VMs: 32 vCPU · 64 GiB; Sailboxes: Not listed
Concurrent sandboxes: Freestyle VMs: Up to 400; Sailboxes: Up to 5,000

Platform

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

Developer

SDKs: Freestyle VMs: JavaScript; Sailboxes: Python, TypeScript, Rust
Integrations: Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK; Sailboxes: Not listed

Trust

License: Freestyle VMs: Not listed; Sailboxes: Not listed
BYOC: Freestyle VMs: Not listed; Sailboxes: Not listed

Hourly cost

One sandbox running for one hour

Size

Freestyle VMs

Sailboxes

1 vCPU · 2 GiB: Freestyle VMs: $0.066; Sailboxes: $0.031
2 vCPU · 4 GiB: Freestyle VMs: $0.132; Sailboxes: $0.062
4 vCPU · 8 GiB: Freestyle VMs: $0.264; Sailboxes: $0.124

Compute only, at list rates.

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Which one fits

Based on the fields above

Freestyle VMs fits when

You use the OpenAI Agents SDK or the Claude Agent SDK.
You need a desktop in the sandbox.

Sailboxes fits when

You want to pay only for usage, with no plan fee.
You want the lower list price: $0.062 against $0.132 an hour for 2 vCPU and 4 GiB.
You need SOC 2 and HIPAA.

More comparisons

See all comparisons

Freestyle VMs

Sailboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Freestyle VMs fits when

Sailboxes fits when

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