Maritime vs Shellbox

Shellbox costs $0.01 per vCPU-hour. Maritime runs Firecracker microVMs. Shellbox runs Firecracker microVMs and has no session limit.

Updated Oct 23, 2026

Maritime

Hosting for persistent AI agents and Linux desktops, each in its own micro-VM.

Isolation: Firecracker microVM
Free tier: 3 agents, forever
Max session: Not listed

Visit site Maritime profile

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

What is different

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

Field

Maritime

Shellbox

Storage: Maritime: $2 per extra 5 GB per machine per month on Starter, $0.75 on Dedicated; Shellbox: A stopped box costs $0.50 per x1 slot per month
Paid plan from: Maritime: $20 / month; Shellbox: Pay as you go
Idle stop: Maritime: After 5 minutes; Shellbox: After 2 minutes
Concurrent sandboxes: Maritime: Up to 500; Shellbox: Up to 16
Integrations: Maritime: MCP, Claude Code, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK; Shellbox: Claude Code

Full comparison

18 fields, at each provider's list price

Maritimemaritime.sh/pricingmaritime.sh

Shellboxshellbox.dev/#pricingshellbox.dev

Pricing

vCPU, per hour: Maritime: Not listed; Shellbox: $0.01
RAM, per GiB-hour: Maritime: Not listed; Shellbox: Included
Storage: Maritime: $2 per extra 5 GB per machine per month on Starter, $0.75 on Dedicated; Shellbox: A stopped box costs $0.50 per x1 slot per month
Free tier: Maritime: 3 agents, forever; Shellbox: Not listed
Paid plan from: Maritime: $20 / month; Shellbox: Pay as you go
Billing: Maritime: Not listed; Shellbox: Bundled machine time

Limits

Max session: Maritime: Not listed; Shellbox: No limit
Idle stop: Maritime: After 5 minutes; Shellbox: After 2 minutes
Largest sandbox: Maritime: Not listed; Shellbox: 16 vCPU · 32 GiB
Concurrent sandboxes: Maritime: Up to 500; Shellbox: Up to 16

Platform

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

Developer

SDKs: Maritime: TypeScript, Python; Shellbox: Not listed
Integrations: Maritime: MCP, Claude Code, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK; Shellbox: Claude Code

Trust

License: Maritime: Not listed; Shellbox: Not listed
BYOC: Maritime: Not listed; Shellbox: Not listed

Hourly cost

One sandbox running for one hour

Size

Maritime

Shellbox

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

Compute only, at list rates.

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Which one fits

Based on the fields above

Maritime fits when

You use MCP, the Claude Agent SDK, the OpenAI Agents SDK or the Vercel AI SDK.
You need a desktop in the sandbox.

Shellbox fits when

You want to pay only for usage, with no plan fee.
You need snapshots.

More comparisons

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Maritime

Shellbox

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Maritime fits when

Shellbox fits when

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