AWS Lambda MicroVMs vs Fly.io Sprites

AWS Lambda MicroVMs costs $0.0997 per vCPU-hour and Fly.io Sprites costs $0.0385 per vCPU-hour. AWS Lambda MicroVMs runs Firecracker microVMs and limits a session to 8 hours. Fly.io Sprites runs microVMs.

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

Fly.io Sprites

Persistent Linux computers that sleep when idle.

Isolation: MicroVM
Free tier: $30 trial credit
Max session: Not listed

Visit site Fly.io Sprites profile

What is different

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

Field

AWS Lambda MicroVMs

Fly.io Sprites

vCPU, per hour: AWS Lambda MicroVMs: $0.0997; Fly.io Sprites: $0.0385
RAM, per GiB-hour: AWS Lambda MicroVMs: $0.0132; Fly.io Sprites: $0.021875
Storage: AWS Lambda MicroVMs: Snapshot storage $0.08 per GB-month (US East). Snapshot reads and writes are billed per GB.; Fly.io Sprites: $0.000683 per GiB-hour
Billing: AWS Lambda MicroVMs: Per second; Fly.io Sprites: Active CPU time only
Isolation: AWS Lambda MicroVMs: Firecracker microVM; Fly.io Sprites: MicroVM
SDKs: AWS Lambda MicroVMs: Python, JavaScript; Fly.io Sprites: Python, JavaScript / TypeScript, Go

Full comparison

18 fields, at each provider's list price

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

Fly.io Spritesfly.io/pricing

Pricing

vCPU, per hour: AWS Lambda MicroVMs: $0.0997; Fly.io Sprites: $0.0385
RAM, per GiB-hour: AWS Lambda MicroVMs: $0.0132; Fly.io Sprites: $0.021875
Storage: AWS Lambda MicroVMs: Snapshot storage $0.08 per GB-month (US East). Snapshot reads and writes are billed per GB.; Fly.io Sprites: $0.000683 per GiB-hour
Free tier: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: $30 trial credit
Paid plan from: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Pay as you go
Billing: AWS Lambda MicroVMs: Per second; Fly.io Sprites: Active CPU time only

Limits

Max session: AWS Lambda MicroVMs: 8 hours; Fly.io Sprites: Not listed
Idle stop: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Not listed
Largest sandbox: AWS Lambda MicroVMs: 4 vCPU · 8 GiB; Fly.io Sprites: Not listed
Concurrent sandboxes: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Not listed

Platform

Isolation: AWS Lambda MicroVMs: Firecracker microVM; Fly.io Sprites: MicroVM
GPU: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Not listed
Snapshots: AWS Lambda MicroVMs:; Fly.io Sprites:
Pause and resume: AWS Lambda MicroVMs:; Fly.io Sprites:

Developer

SDKs: AWS Lambda MicroVMs: Python, JavaScript; Fly.io Sprites: Python, JavaScript / TypeScript, Go
Integrations: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: MCP, OpenAI Agents SDK

Trust

License: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Not listed
BYOC: AWS Lambda MicroVMs: Not listed; Fly.io Sprites: Not listed

Hourly cost

One sandbox running for one hour

Size

AWS Lambda MicroVMs

Fly.io Sprites

1 vCPU · 2 GiB: AWS Lambda MicroVMs: $0.126; Fly.io Sprites: $0.082
2 vCPU · 4 GiB: AWS Lambda MicroVMs: $0.252; Fly.io Sprites: $0.165
4 vCPU · 8 GiB: AWS Lambda MicroVMs: $0.504; Fly.io Sprites: $0.329

Compute only, at list rates.

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Which one fits

Based on the fields above

Fly.io Sprites fits when

You use MCP or the OpenAI Agents SDK.
You want the lower list price: $0.165 against $0.252 an hour for 2 vCPU and 4 GiB.
Your code waits a lot: CPU is billed only while it is in use.

More comparisons

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AWS Lambda MicroVMs

Fly.io Sprites

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Fly.io Sprites fits when

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