Sailboxes vs Sendblue Sandboxes

Sailboxes costs $0.015 per vCPU-hour and Sendblue Sandboxes costs $0.165 per vCPU-hour. Sailboxes runs full VMs and has no session limit. Sendblue Sandboxes runs containers.

Updated Oct 15, 2026

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

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

Sailboxes

Sendblue Sandboxes

vCPU, per hour: Sailboxes: $0.015; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Sailboxes: $0.008; Sendblue Sandboxes: Included
Free tier: Sailboxes: $5 credit every month; Sendblue Sandboxes: $100 free compute, once per phone number
Billing: Sailboxes: Per second; Sendblue Sandboxes: Bundled machine time
Largest sandbox: Sailboxes: 8 vCPU · 256 GiB; Sendblue Sandboxes: 2 vCPU · 8 GiB
Concurrent sandboxes: Sailboxes: Up to 5,000; Sendblue Sandboxes: Up to 5
Isolation: Sailboxes: Full VM; Sendblue Sandboxes: Container
Pause and resume: Sailboxes:; Sendblue Sandboxes: No

Full comparison

18 fields, at each provider's list price

Sailboxesdocs.sailresearch.com/pricingdocs.sailresearch.com

Sendblue Sandboxessendblue.com/sandboxessendblue.com

Pricing

vCPU, per hour: Sailboxes: $0.015; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Sailboxes: $0.008; Sendblue Sandboxes: Included
Storage: Sailboxes: $0.0007 per GiB-hour; Sendblue Sandboxes: Not listed
Free tier: Sailboxes: $5 credit every month; Sendblue Sandboxes: $100 free compute, once per phone number
Paid plan from: Sailboxes: Pay as you go; Sendblue Sandboxes: Not listed
Billing: Sailboxes: Per second; Sendblue Sandboxes: Bundled machine time

Limits

Max session: Sailboxes: No limit; Sendblue Sandboxes: Not listed
Idle stop: Sailboxes: Not listed; Sendblue Sandboxes: After 10 minutes
Largest sandbox: Sailboxes: 8 vCPU · 256 GiB; Sendblue Sandboxes: 2 vCPU · 8 GiB
Concurrent sandboxes: Sailboxes: Up to 5,000; Sendblue Sandboxes: Up to 5

Platform

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

Developer

SDKs: Sailboxes: Python, TypeScript, Rust; Sendblue Sandboxes: Not listed
Integrations: Sailboxes: Claude Code; Sendblue Sandboxes: Not listed

Trust

License: Sailboxes: Not listed; Sendblue Sandboxes: Not listed
BYOC: Sailboxes: Not listed; Sendblue Sandboxes: Not listed

Hourly cost

One sandbox running for one hour

Size

Sailboxes

Sendblue Sandboxes

1 vCPU · 2 GiB: Sailboxes: $0.031; Sendblue Sandboxes: $0.165
2 vCPU · 4 GiB: Sailboxes: $0.062; Sendblue Sandboxes: $0.330
4 vCPU · 8 GiB: Sailboxes: $0.124; Sendblue Sandboxes: $0.660

Compute only, at list rates.

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Which one fits

Based on the fields above

Sailboxes fits when

You want each sandbox to be a full VM.
You use Claude Code.
You want the lower list price: $0.062 against $0.330 an hour for 2 vCPU and 4 GiB.
You need snapshots.

Sendblue Sandboxes fits when

You want the larger free credit: $100 against $5.

More comparisons

See all comparisons

Sailboxes

Sendblue Sandboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Sailboxes fits when

Sendblue Sandboxes fits when

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