Celesto Cloud vs Shellbox

Celesto Cloud costs $0.015 per vCPU-hour and Shellbox costs $0.01 per vCPU-hour. Celesto Cloud runs microVMs. Shellbox runs Firecracker microVMs and has no session limit.

Updated Oct 23, 2026

Celesto Cloud

Cloud computers for AI agents, each in a microVM.

Isolation: MicroVM
Free tier: $5 runtime credit, one time, 30 days
Max session: Not listed

Visit site Celesto Cloud 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

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

Field

Celesto Cloud

Shellbox

vCPU, per hour: Celesto Cloud: $0.015; Shellbox: $0.01
Storage: Celesto Cloud: Free; Shellbox: A stopped box costs $0.50 per x1 slot per month
Largest sandbox: Celesto Cloud: 8 vCPU · 32 GiB; Shellbox: 16 vCPU · 32 GiB
Concurrent sandboxes: Celesto Cloud: Up to 10; Shellbox: Up to 16
Isolation: Celesto Cloud: MicroVM; Shellbox: Firecracker microVM
Integrations: Celesto Cloud: MCP, OpenAI Agents SDK, Claude Code; Shellbox: Claude Code

Full comparison

18 fields, at each provider's list price

Celesto Cloudcelesto.ai/pricing

Shellboxshellbox.dev/#pricingshellbox.dev

Pricing

vCPU, per hour: Celesto Cloud: $0.015; Shellbox: $0.01
RAM, per GiB-hour: Celesto Cloud: Included; Shellbox: Included
Storage: Celesto Cloud: Free; Shellbox: A stopped box costs $0.50 per x1 slot per month
Free tier: Celesto Cloud: $5 runtime credit, one time, 30 days; Shellbox: Not listed
Paid plan from: Celesto Cloud: Pay as you go; Shellbox: Pay as you go
Billing: Celesto Cloud: Bundled machine time; Shellbox: Bundled machine time

Limits

Max session: Celesto Cloud: Not listed; Shellbox: No limit
Idle stop: Celesto Cloud: Not listed; Shellbox: After 2 minutes
Largest sandbox: Celesto Cloud: 8 vCPU · 32 GiB; Shellbox: 16 vCPU · 32 GiB
Concurrent sandboxes: Celesto Cloud: Up to 10; Shellbox: Up to 16

Platform

Isolation: Celesto Cloud: MicroVM; Shellbox: Firecracker microVM
GPU: Celesto Cloud: Not listed; Shellbox: Not listed
Snapshots: Celesto Cloud:; Shellbox:
Pause and resume: Celesto Cloud:; Shellbox:

Developer

SDKs: Celesto Cloud: Python, JavaScript / TypeScript; Shellbox: Not listed
Integrations: Celesto Cloud: MCP, OpenAI Agents SDK, Claude Code; Shellbox: Claude Code

Trust

License: Celesto Cloud: Apache-2.0; Shellbox: Not listed
BYOC: Celesto Cloud: Not listed; Shellbox: Not listed

Hourly cost

One sandbox running for one hour

Size

Celesto Cloud

Shellbox

1 vCPU · 2 GiB: Celesto Cloud: $0.015; Shellbox: $0.010
2 vCPU · 4 GiB: Celesto Cloud: $0.030; Shellbox: $0.020
4 vCPU · 8 GiB: Celesto Cloud: $0.060; Shellbox: $0.040

Compute only, at list rates.

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Which one fits

Based on the fields above

Celesto Cloud fits when

You want an open-source platform (Apache-2.0).
You use MCP or the OpenAI Agents SDK.
You need a desktop in the sandbox.

Shellbox fits when

You want the lower list price: $0.020 against $0.030 an hour for 2 vCPU and 4 GiB.
You need a sandbox larger than 8 vCPU · 32 GiB.

More comparisons

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Celesto Cloud

Shellbox

What is different

Full comparison

Pricing

Limits

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Developer

Trust

Hourly cost

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