Freestyle VMs vs Sendblue Sandboxes

Freestyle VMs costs $0.04032 per vCPU-hour and Sendblue Sandboxes costs $0.165 per vCPU-hour. Freestyle VMs runs full VMs and offers GPUs. Sendblue Sandboxes runs containers.

Updated Oct 15, 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

Sendblue Sandboxes

Isolated cloud Linux machines that AI agents control over an HTTP API.

Isolation: Container
Free tier: $100 free compute, once per phone number
Max session: Not listed

Visit site Sendblue Sandboxes profile

What is different

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

Field

Freestyle VMs

Sendblue Sandboxes

vCPU, per hour: Freestyle VMs: $0.04032; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sendblue Sandboxes: Included
Free tier: Freestyle VMs: Free plan, $0 forever; Sendblue Sandboxes: $100 free compute, once per phone number
Billing: Freestyle VMs: Per second; Sendblue Sandboxes: Bundled machine time
Largest sandbox: Freestyle VMs: 32 vCPU · 64 GiB; Sendblue Sandboxes: 2 vCPU · 8 GiB
Concurrent sandboxes: Freestyle VMs: Up to 400; Sendblue Sandboxes: Up to 5
Isolation: Freestyle VMs: Full VM; Sendblue Sandboxes: Container
Pause and resume: Freestyle VMs:; Sendblue Sandboxes: No

Full comparison

18 fields, at each provider's list price

Freestyle VMsfreestyle.sh/pricingfreestyle.sh

Sendblue Sandboxessendblue.com/sandboxessendblue.com

Pricing

vCPU, per hour: Freestyle VMs: $0.04032; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Freestyle VMs: $0.0129; Sendblue Sandboxes: Included
Storage: Freestyle VMs: $0.000086 per GiB-hour; Sendblue Sandboxes: Not listed
Free tier: Freestyle VMs: Free plan, $0 forever; Sendblue Sandboxes: $100 free compute, once per phone number
Paid plan from: Freestyle VMs: $50 / month; Sendblue Sandboxes: Not listed
Billing: Freestyle VMs: Per second; Sendblue Sandboxes: Bundled machine time

Limits

Max session: Freestyle VMs: Not listed; Sendblue Sandboxes: Not listed
Idle stop: Freestyle VMs: Not listed; Sendblue Sandboxes: After 10 minutes
Largest sandbox: Freestyle VMs: 32 vCPU · 64 GiB; Sendblue Sandboxes: 2 vCPU · 8 GiB
Concurrent sandboxes: Freestyle VMs: Up to 400; Sendblue Sandboxes: Up to 5

Platform

Isolation: Freestyle VMs: Full VM; Sendblue Sandboxes: Container
GPU: Freestyle VMs:; Sendblue Sandboxes: Not listed
Snapshots: Freestyle VMs:; Sendblue Sandboxes: Not listed
Pause and resume: Freestyle VMs:; Sendblue Sandboxes: No

Developer

SDKs: Freestyle VMs: JavaScript; Sendblue Sandboxes: Not listed
Integrations: Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK, Claude Code; Sendblue Sandboxes: Not listed

Trust

License: Freestyle VMs: Not listed; Sendblue Sandboxes: Not listed
BYOC: Freestyle VMs: Not listed; Sendblue Sandboxes: Not listed

Hourly cost

One sandbox running for one hour

Size

Freestyle VMs

Sendblue Sandboxes

1 vCPU · 2 GiB: Freestyle VMs: $0.066; Sendblue Sandboxes: $0.165
2 vCPU · 4 GiB: Freestyle VMs: $0.132; Sendblue Sandboxes: $0.330
4 vCPU · 8 GiB: Freestyle VMs: $0.264; Sendblue Sandboxes: $0.660

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Freestyle VMs fits when

You need GPUs.
You want each sandbox to be a full VM.
You use the OpenAI Agents SDK, the Claude Agent SDK or Claude Code.
You want the lower list price: $0.132 against $0.330 an hour for 2 vCPU and 4 GiB.

More comparisons

See all comparisons

Freestyle VMs

Sendblue Sandboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Freestyle VMs fits when

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