Sandbox0 vs Shardflux

Sandbox0 bills memory only, at $0.015 per GiB-hour. Shardflux costs $0.04 per vCPU-hour. Sandbox0 runs gVisor and has no session limit. Shardflux runs Firecracker microVMs and offers GPUs.

Updated Oct 15, 2026

Sandbox0

Long-running agent sandboxes with durable storage.

Isolation: gVisor
Free tier: Not listed
Max session: No limit

Visit site Sandbox0 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

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

Field

Sandbox0

Shardflux

vCPU, per hour: Sandbox0: Included; Shardflux: $0.04
Storage: Sandbox0: Free; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Paid plan from: Sandbox0: Pay as you go; Shardflux: $9 / month
Billing: Sandbox0: Memory only; Shardflux: Active CPU time only
Concurrent sandboxes: Sandbox0: Up to 20; Shardflux: Up to 200
Isolation: Sandbox0: gVisor; Shardflux: Firecracker microVM
SDKs: Sandbox0: Go, Python, TypeScript; Shardflux: TypeScript, Python
Integrations: Sandbox0: LangChain, OpenAI Agents SDK; Shardflux: Claude Code, MCP

Full comparison

18 fields, at each provider's list price

Sandbox0sandbox0.ai/pricingsandbox0.ai

Shardfluxshardflux.dev/#pricingshardflux.dev

Pricing

vCPU, per hour: Sandbox0: Included; Shardflux: $0.04
RAM, per GiB-hour: Sandbox0: $0.015; Shardflux: $0.015
Storage: Sandbox0: Free; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Sandbox0: Not listed; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Sandbox0: Pay as you go; Shardflux: $9 / month
Billing: Sandbox0: Memory only; Shardflux: Active CPU time only

Limits

Max session: Sandbox0: No limit; Shardflux: Not listed
Idle stop: Sandbox0: Not listed; Shardflux: Not listed
Largest sandbox: Sandbox0: Not listed; Shardflux: 32 vCPU · 64 GiB
Concurrent sandboxes: Sandbox0: Up to 20; Shardflux: Up to 200

Platform

Isolation: Sandbox0: gVisor; Shardflux: Firecracker microVM
GPU: Sandbox0: Not listed; Shardflux:
Snapshots: Sandbox0:; Shardflux:
Pause and resume: Sandbox0:; Shardflux:

Developer

SDKs: Sandbox0: Go, Python, TypeScript; Shardflux: TypeScript, Python
Integrations: Sandbox0: LangChain, OpenAI Agents SDK; Shardflux: Claude Code, MCP

Trust

License: Sandbox0: Apache-2.0; Shardflux: Not listed
BYOC: Sandbox0: Not listed; Shardflux: Not listed

Hourly cost

One sandbox running for one hour

Size

Sandbox0

Shardflux

1 vCPU · 2 GiB: Sandbox0: $0.030; Shardflux: $0.070
2 vCPU · 4 GiB: Sandbox0: $0.060; Shardflux: $0.140
4 vCPU · 8 GiB: Sandbox0: $0.120; Shardflux: $0.280

Compute only, at list rates.

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Which one fits

Based on the fields above

Sandbox0 fits when

You want to pay only for usage, with no plan fee.
You want an open-source platform (Apache-2.0) that you can self-host.
You use LangChain or the OpenAI Agents SDK.
You want the lower list price: $0.060 against $0.140 an hour for 2 vCPU and 4 GiB.

Shardflux fits when

You need GPUs.
You want each sandbox in its own microVM.
You use Claude Code or MCP.
You need a desktop in the sandbox.

More comparisons

See all comparisons

Sandbox0

Shardflux

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Sandbox0 fits when

Shardflux fits when

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