Smol Machines vs Unikraft Cloud

Smol Machines costs $0.05 per vCPU-hour. Smol Machines runs microVMs. Unikraft Cloud runs Firecracker microVMs and offers GPUs.

Updated Oct 15, 2026

Smol Machines

Hosted Linux microVMs with their own kernel, for agents and untrusted code.

Isolation: MicroVM
Free tier: $100 credit, one time
Max session: Not listed

Visit site Smol Machines profile

Unikraft Cloud

MicroVM sandboxes that start in under 10 ms.

Isolation: Firecracker microVM
Free tier: Hobby plan, free forever
Max session: Not listed

Visit site Unikraft Cloud profile

What is different

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

Field

Smol Machines

Unikraft Cloud

Free tier: Smol Machines: $100 credit, one time; Unikraft Cloud: Hobby plan, free forever
Paid plan from: Smol Machines: Pay as you go; Unikraft Cloud: $39 / month
Concurrent sandboxes: Smol Machines: Up to 1,000; Unikraft Cloud: Up to 24
Isolation: Smol Machines: MicroVM; Unikraft Cloud: Firecracker microVM
GPU: Smol Machines: No; Unikraft Cloud:
Snapshots: Smol Machines: No; Unikraft Cloud:
SDKs: Smol Machines: TypeScript, Python, Rust; Unikraft Cloud: Python, JavaScript / TypeScript, Go

Full comparison

18 fields, at each provider's list price

Smol Machinessmolmachines.com/pricingsmolmachines.com

Unikraft Cloudunikraft.com/pricingunikraft.com

Pricing

vCPU, per hour: Smol Machines: $0.05; Unikraft Cloud: Not listed
RAM, per GiB-hour: Smol Machines: $0.0162; Unikraft Cloud: Not listed
Storage: Smol Machines: $0.0001 per GiB-hour; Unikraft Cloud: Not listed
Free tier: Smol Machines: $100 credit, one time; Unikraft Cloud: Hobby plan, free forever
Paid plan from: Smol Machines: Pay as you go; Unikraft Cloud: $39 / month
Billing: Smol Machines: Active CPU time only; Unikraft Cloud: Not listed

Limits

Max session: Smol Machines: Not listed; Unikraft Cloud: Not listed
Idle stop: Smol Machines: Not listed; Unikraft Cloud: Not listed
Largest sandbox: Smol Machines: 32 vCPU · 32 GiB; Unikraft Cloud: Not listed
Concurrent sandboxes: Smol Machines: Up to 1,000; Unikraft Cloud: Up to 24

Platform

Isolation: Smol Machines: MicroVM; Unikraft Cloud: Firecracker microVM
GPU: Smol Machines: No; Unikraft Cloud:
Snapshots: Smol Machines: No; Unikraft Cloud:
Pause and resume: Smol Machines:; Unikraft Cloud:

Developer

SDKs: Smol Machines: TypeScript, Python, Rust; Unikraft Cloud: Python, JavaScript / TypeScript, Go
Integrations: Smol Machines: Not listed; Unikraft Cloud: Not listed

Trust

License: Smol Machines: Apache-2.0; Unikraft Cloud: Not listed
BYOC: Smol Machines: Not listed; Unikraft Cloud: Enterprise plan

Hourly cost

One sandbox running for one hour

Size

Smol Machines

Unikraft Cloud

1 vCPU · 2 GiB: Smol Machines: $0.082; Unikraft Cloud: Not listed
2 vCPU · 4 GiB: Smol Machines: $0.165; Unikraft Cloud: Not listed
4 vCPU · 8 GiB: Smol Machines: $0.330; Unikraft Cloud: Not listed

Compute only, at list rates.

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Which one fits

Based on the fields above

Smol Machines fits when

You want to pay only for usage, with no plan fee.
You want an open-source platform (Apache-2.0) that you can self-host.
Your code waits a lot: CPU is billed only while it is in use.

Unikraft Cloud fits when

You need GPUs.
You need snapshots.
You need a desktop in the sandbox.
You need the sandboxes in your own cloud account.

More comparisons

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Smol Machines

Unikraft Cloud

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Smol Machines fits when

Unikraft Cloud fits when

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