Smol Machines vs Watasu

Smol Machines costs $0.05 per vCPU-hour. Smol Machines runs microVMs. Watasu limits a session to 24 hours.

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

Watasu

Isolated Linux sandboxes for AI agents, hosted in the EU.

Isolation: Not listed
Free tier: Free Basic plan
Max session: 24 hours

Visit site Watasu profile

What is different

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

Field

Smol Machines

Watasu

Storage: Smol Machines: $0.0001 per GiB-hour; Watasu: Retained disks €0.10 per GiB per month while the sandbox is stopped. Checkpoints and templates €0.03 per GiB per month.
Free tier: Smol Machines: $100 credit, one time; Watasu: Free Basic plan
Billing: Smol Machines: Active CPU time only; Watasu: Per second
Largest sandbox: Smol Machines: 32 vCPU · 32 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Smol Machines: Up to 1,000; Watasu: Up to 100
Snapshots: Smol Machines: No; Watasu:

Full comparison

18 fields, at each provider's list price

Smol Machinessmolmachines.com/pricingsmolmachines.com

Watasuwatasu.io/pricing

Pricing

vCPU, per hour: Smol Machines: $0.05; Watasu: Not listed
RAM, per GiB-hour: Smol Machines: $0.0162; Watasu: Not listed
Storage: Smol Machines: $0.0001 per GiB-hour; Watasu: Retained disks €0.10 per GiB per month while the sandbox is stopped. Checkpoints and templates €0.03 per GiB per month.
Free tier: Smol Machines: $100 credit, one time; Watasu: Free Basic plan
Paid plan from: Smol Machines: Pay as you go; Watasu: Not listed
Billing: Smol Machines: Active CPU time only; Watasu: Per second

Limits

Max session: Smol Machines: Not listed; Watasu: 24 hours
Idle stop: Smol Machines: Not listed; Watasu: Not listed
Largest sandbox: Smol Machines: 32 vCPU · 32 GiB; Watasu: 8 vCPU · 8 GiB
Concurrent sandboxes: Smol Machines: Up to 1,000; Watasu: Up to 100

Platform

Isolation: Smol Machines: MicroVM; Watasu: Not listed
GPU: Smol Machines: No; Watasu: Not listed
Snapshots: Smol Machines: No; Watasu:
Pause and resume: Smol Machines:; Watasu:

Developer

SDKs: Smol Machines: TypeScript, Python, Rust; Watasu: Not listed
Integrations: Smol Machines: Not listed; Watasu: Not listed

Trust

License: Smol Machines: Apache-2.0; Watasu: Not listed
BYOC: Smol Machines: Not listed; Watasu: Not listed

Hourly cost

One sandbox running for one hour

Size

Smol Machines

Watasu

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

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Smol Machines fits when

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.
You need a sandbox larger than 8 vCPU · 8 GiB.

Watasu fits when

You need snapshots.

More comparisons

See all comparisons

Smol Machines

Watasu

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Smol Machines fits when

Watasu fits when

More comparisons

Related

Compare

Pricing

Browse