Blaxel vs Fly.io Sprites

Blaxel bills memory only, at $0.0414 per GiB-hour. Fly.io Sprites costs $0.0385 per vCPU-hour. Blaxel runs microVMs and has no session limit. Fly.io Sprites runs microVMs.

Updated Oct 14, 2026

Blaxel

Sandboxes that pause when idle and resume with state.

Isolation: MicroVM
Free tier: Credit of up to $200
Max session: No limit

Visit site Blaxel 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

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

Field

Blaxel

Fly.io Sprites

vCPU, per hour: Blaxel: Included; Fly.io Sprites: $0.0385
RAM, per GiB-hour: Blaxel: $0.0414; Fly.io Sprites: $0.021875
Storage: Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.; Fly.io Sprites: $0.000683 per GiB-hour
Free tier: Blaxel: Credit of up to $200; Fly.io Sprites: $30 trial credit
Billing: Blaxel: Memory only; Fly.io Sprites: Active CPU time only
SDKs: Blaxel: Python, TypeScript, Go; Fly.io Sprites: Python, JavaScript / TypeScript, Go
Integrations: Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP, Claude Code; Fly.io Sprites: MCP, OpenAI Agents SDK, Claude Code

Full comparison

18 fields, at each provider's list price

Blaxelblaxel.ai/pricing

Fly.io Spritesfly.io/pricing

Pricing

vCPU, per hour: Blaxel: Included; Fly.io Sprites: $0.0385
RAM, per GiB-hour: Blaxel: $0.0414; Fly.io Sprites: $0.021875
Storage: Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.; Fly.io Sprites: $0.000683 per GiB-hour
Free tier: Blaxel: Credit of up to $200; Fly.io Sprites: $30 trial credit
Paid plan from: Blaxel: Pay as you go; Fly.io Sprites: Pay as you go
Billing: Blaxel: Memory only; Fly.io Sprites: Active CPU time only

Limits

Max session: Blaxel: No limit; Fly.io Sprites: Not listed
Idle stop: Blaxel: Not listed; Fly.io Sprites: Not listed
Largest sandbox: Blaxel: Not listed; Fly.io Sprites: Not listed
Concurrent sandboxes: Blaxel: Not listed; Fly.io Sprites: Not listed

Platform

Isolation: Blaxel: MicroVM; Fly.io Sprites: MicroVM
GPU: Blaxel: Not listed; Fly.io Sprites: Not listed
Snapshots: Blaxel:; Fly.io Sprites:
Pause and resume: Blaxel:; Fly.io Sprites:

Developer

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

Trust

License: Blaxel: Not listed; Fly.io Sprites: Not listed
BYOC: Blaxel: Bring-your-own-metal in your VPC; Fly.io Sprites: Not listed

Hourly cost

One sandbox running for one hour

Size

Blaxel

Fly.io Sprites

1 vCPU · 2 GiB: Blaxel: $0.083; Fly.io Sprites: $0.082
2 vCPU · 4 GiB: Blaxel: $0.166; Fly.io Sprites: $0.165
4 vCPU · 8 GiB: Blaxel: $0.331; Fly.io Sprites: $0.329

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Blaxel fits when

You use the Claude Agent SDK.
You want the larger free credit: $200 against $30.
You need a desktop in the sandbox.
You need the sandboxes in your own cloud account.

Fly.io Sprites fits when

You want the lower list price: $0.165 against $0.166 an hour for 2 vCPU and 4 GiB.
Your code waits a lot: CPU is billed only while it is in use.

More comparisons

See all comparisons

Blaxel

Fly.io Sprites

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Blaxel fits when

Fly.io Sprites fits when

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