Fly.io Sprites vs Shardflux

Fly.io Sprites costs $0.0385 per vCPU-hour and Shardflux costs $0.04 per vCPU-hour. Fly.io Sprites runs Firecracker microVMs. Shardflux runs Firecracker microVMs and offers GPUs.

Updated Oct 15, 2026

Fly.io Sprites

Persistent Linux computers that sleep when idle.

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

Visit site Fly.io Sprites profile

Shardflux

Serverless VMs for cloud agents that park when idle and keep their state.

Isolation: Firecracker microVM
Free tier: 30-day Pro trial, no card needed
Max session: Not listed

Visit site Shardflux profile

What is different

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

Field

Fly.io Sprites

Shardflux

vCPU, per hour: Fly.io Sprites: $0.0385; Shardflux: $0.04
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Shardflux: $0.015
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Fly.io Sprites: $30 trial credit; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Fly.io Sprites: Pay as you go; Shardflux: $9 / month
SDKs: Fly.io Sprites: Python, JavaScript / TypeScript, Go; Shardflux: TypeScript, Python
Integrations: Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code; Shardflux: Claude Code, MCP

Full comparison

18 fields, at each provider's list price

Fly.io Spritesfly.io/pricing

Shardfluxshardflux.dev/#pricingshardflux.dev

Pricing

vCPU, per hour: Fly.io Sprites: $0.0385; Shardflux: $0.04
RAM, per GiB-hour: Fly.io Sprites: $0.021875; Shardflux: $0.015
Storage: Fly.io Sprites: $0.000683 per GiB-hour; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Fly.io Sprites: $30 trial credit; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Fly.io Sprites: Pay as you go; Shardflux: $9 / month
Billing: Fly.io Sprites: Active CPU time only; Shardflux: Active CPU time only

Limits

Max session: Fly.io Sprites: Not listed; Shardflux: Not listed
Idle stop: Fly.io Sprites: Not listed; Shardflux: Not listed
Largest sandbox: Fly.io Sprites: Not listed; Shardflux: 32 vCPU · 64 GiB
Concurrent sandboxes: Fly.io Sprites: Not listed; Shardflux: Up to 200

Platform

Isolation: Fly.io Sprites: Firecracker microVM; Shardflux: Firecracker microVM
GPU: Fly.io Sprites: Not listed; Shardflux:
Snapshots: Fly.io Sprites:; Shardflux:
Pause and resume: Fly.io Sprites:; Shardflux:

Developer

SDKs: Fly.io Sprites: Python, JavaScript / TypeScript, Go; Shardflux: TypeScript, Python
Integrations: Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code; Shardflux: Claude Code, MCP

Trust

License: Fly.io Sprites: Not listed; Shardflux: Not listed
BYOC: Fly.io Sprites: Not listed; Shardflux: Not listed

Hourly cost

One sandbox running for one hour

Size

Fly.io Sprites

Shardflux

1 vCPU · 2 GiB: Fly.io Sprites: $0.082; Shardflux: $0.070
2 vCPU · 4 GiB: Fly.io Sprites: $0.165; Shardflux: $0.140
4 vCPU · 8 GiB: Fly.io Sprites: $0.329; Shardflux: $0.280

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Fly.io Sprites fits when

You want to pay only for usage, with no plan fee.
You use the OpenAI Agents SDK.

Shardflux fits when

You need GPUs.
You want the lower list price: $0.140 against $0.165 an hour for 2 vCPU and 4 GiB.
You need a desktop in the sandbox.

More comparisons

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Fly.io Sprites

Shardflux

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Fly.io Sprites fits when

Shardflux fits when

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