AWS Lambda MicroVMs vs Cua Fleets

AWS Lambda MicroVMs costs $0.0997 per vCPU-hour and Cua Fleets costs $0.044625 per vCPU-hour. AWS Lambda MicroVMs runs Firecracker microVMs and limits a session to 8 hours. Cua Fleets runs gVisor.

Updated Oct 14, 2026

AWS Lambda MicroVMs

Serverless microVMs on AWS that suspend when idle.

Isolation: Firecracker microVM
Free tier: Not listed
Max session: 8 hours

Visit site AWS Lambda MicroVMs profile

Cua Fleets

Hosted Linux and Windows sandboxes for computer-use agents.

Isolation: gVisor
Free tier: Not listed
Max session: Not listed

Visit site Cua Fleets profile

What is different

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

Field

AWS Lambda MicroVMs

Cua Fleets

vCPU, per hour: AWS Lambda MicroVMs: $0.0997; Cua Fleets: $0.044625
RAM, per GiB-hour: AWS Lambda MicroVMs: $0.0132; Cua Fleets: $0.0223125
Storage: AWS Lambda MicroVMs: Snapshot storage $0.08 per GB-month (US East). Snapshot reads and writes are billed per GB.; Cua Fleets: Free
Largest sandbox: AWS Lambda MicroVMs: 4 vCPU · 8 GiB; Cua Fleets: 8 vCPU · 32 GiB
Isolation: AWS Lambda MicroVMs: Firecracker microVM; Cua Fleets: gVisor
Pause and resume: AWS Lambda MicroVMs:; Cua Fleets: No
SDKs: AWS Lambda MicroVMs: Python, JavaScript; Cua Fleets: Python, TypeScript, Rust

Full comparison

18 fields, at each provider's list price

AWS Lambda MicroVMsaws.amazon.com/lambda/pricingaws.amazon.com

Cua Fleetscua.ai/#pricing

Pricing

vCPU, per hour: AWS Lambda MicroVMs: $0.0997; Cua Fleets: $0.044625
RAM, per GiB-hour: AWS Lambda MicroVMs: $0.0132; Cua Fleets: $0.0223125
Storage: AWS Lambda MicroVMs: Snapshot storage $0.08 per GB-month (US East). Snapshot reads and writes are billed per GB.; Cua Fleets: Free
Free tier: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed
Paid plan from: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed
Billing: AWS Lambda MicroVMs: Per second; Cua Fleets: Per second

Limits

Max session: AWS Lambda MicroVMs: 8 hours; Cua Fleets: Not listed
Idle stop: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed
Largest sandbox: AWS Lambda MicroVMs: 4 vCPU · 8 GiB; Cua Fleets: 8 vCPU · 32 GiB
Concurrent sandboxes: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed

Platform

Isolation: AWS Lambda MicroVMs: Firecracker microVM; Cua Fleets: gVisor
GPU: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed
Snapshots: AWS Lambda MicroVMs:; Cua Fleets: Not listed
Pause and resume: AWS Lambda MicroVMs:; Cua Fleets: No

Developer

SDKs: AWS Lambda MicroVMs: Python, JavaScript; Cua Fleets: Python, TypeScript, Rust
Integrations: AWS Lambda MicroVMs: Not listed; Cua Fleets: OpenAI Agents SDK, MCP

Trust

License: AWS Lambda MicroVMs: Not listed; Cua Fleets: Not listed
BYOC: AWS Lambda MicroVMs: Not listed; Cua Fleets: Your AWS, Google Cloud, or Modal account

Hourly cost

One sandbox running for one hour

Size

AWS Lambda MicroVMs

Cua Fleets

1 vCPU · 2 GiB: AWS Lambda MicroVMs: $0.126; Cua Fleets: $0.089
2 vCPU · 4 GiB: AWS Lambda MicroVMs: $0.252; Cua Fleets: $0.179
4 vCPU · 8 GiB: AWS Lambda MicroVMs: $0.504; Cua Fleets: $0.357

Compute only, at list rates.

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Which one fits

Based on the fields above

AWS Lambda MicroVMs fits when

You want each sandbox in its own microVM.
You need snapshots.
You need pause and resume.

Cua Fleets fits when

You use the OpenAI Agents SDK or MCP.
You want the lower list price: $0.179 against $0.252 an hour for 2 vCPU and 4 GiB.
You need a desktop in the sandbox.
You need the sandboxes in your own cloud account.

More comparisons

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AWS Lambda MicroVMs

Cua Fleets

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

AWS Lambda MicroVMs fits when

Cua Fleets fits when

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