Blaxel vs Shardflux

Blaxel bills memory only, at $0.0414 per GiB-hour. Shardflux costs $0.04 per vCPU-hour. Blaxel runs microVMs and has no session limit. Shardflux runs Firecracker microVMs and offers GPUs.

Updated Oct 15, 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

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

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

Field

Blaxel

Shardflux

vCPU, per hour: Blaxel: Included; Shardflux: $0.04
RAM, per GiB-hour: Blaxel: $0.0414; Shardflux: $0.015
Storage: Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Blaxel: Credit of up to $200; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Blaxel: Pay as you go; Shardflux: $9 / month
Billing: Blaxel: Memory only; Shardflux: Active CPU time only
Isolation: Blaxel: MicroVM; Shardflux: Firecracker microVM
SDKs: Blaxel: Python, TypeScript, Go; Shardflux: TypeScript, Python
Integrations: Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP, Claude Code, LangChain, Vercel AI SDK; Shardflux: Claude Code, MCP

Full comparison

18 fields, at each provider's list price

Blaxelblaxel.ai/pricing

Shardfluxshardflux.dev/#pricingshardflux.dev

Pricing

vCPU, per hour: Blaxel: Included; Shardflux: $0.04
RAM, per GiB-hour: Blaxel: $0.0414; Shardflux: $0.015
Storage: Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Blaxel: Credit of up to $200; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Blaxel: Pay as you go; Shardflux: $9 / month
Billing: Blaxel: Memory only; Shardflux: Active CPU time only

Limits

Max session: Blaxel: No limit; Shardflux: Not listed
Idle stop: Blaxel: Not listed; Shardflux: Not listed
Largest sandbox: Blaxel: Not listed; Shardflux: 32 vCPU · 64 GiB
Concurrent sandboxes: Blaxel: Not listed; Shardflux: Up to 200

Platform

Isolation: Blaxel: MicroVM; Shardflux: Firecracker microVM
GPU: Blaxel: Not listed; Shardflux:
Snapshots: Blaxel:; Shardflux:
Pause and resume: Blaxel:; Shardflux:

Developer

SDKs: Blaxel: Python, TypeScript, Go; Shardflux: TypeScript, Python
Integrations: Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP, Claude Code, LangChain, Vercel AI SDK; Shardflux: Claude Code, MCP

Trust

License: Blaxel: Not listed; Shardflux: Not listed
BYOC: Blaxel: Bring-your-own-metal in your VPC, on request; Shardflux: Not listed

Hourly cost

One sandbox running for one hour

Size

Blaxel

Shardflux

1 vCPU · 2 GiB: Blaxel: $0.083; Shardflux: $0.070
2 vCPU · 4 GiB: Blaxel: $0.166; Shardflux: $0.140
4 vCPU · 8 GiB: Blaxel: $0.331; Shardflux: $0.280

Compute only, at list rates.

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Which one fits

Based on the fields above

Blaxel fits when

You want to pay only for usage, with no plan fee.
You use the OpenAI Agents SDK, the Claude Agent SDK, LangChain or the Vercel AI SDK.
You need the sandboxes in your own cloud account.
You want one rate for memory, with CPU included.

Shardflux fits when

You need GPUs.
You want the lower list price: $0.140 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

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Blaxel

Shardflux

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Blaxel fits when

Shardflux fits when

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