Shardflux vs Zipbox

Shardflux costs $0.04 per vCPU-hour and Zipbox costs $0.00685 per vCPU-hour. Shardflux runs Firecracker microVMs and offers GPUs. Zipbox runs Firecracker microVMs and has no session limit.

Updated Oct 23, 2026

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

Zipbox

Long-lived Firecracker microVMs for AI agents, each with its own desktop.

Isolation: Firecracker microVM
Free tier: $25 credit after a one-time $5 top-up
Max session: No limit

Visit site Zipbox profile

What is different

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

Field

Shardflux

Zipbox

vCPU, per hour: Shardflux: $0.04; Zipbox: $0.00685
RAM, per GiB-hour: Shardflux: $0.015; Zipbox: Included
Free tier: Shardflux: 30-day Pro trial, no card needed; Zipbox: $25 credit after a one-time $5 top-up
Paid plan from: Shardflux: $9 / month; Zipbox: Pay as you go
Billing: Shardflux: Active CPU time only; Zipbox: Bundled machine time
Largest sandbox: Shardflux: 32 vCPU · 64 GiB; Zipbox: 6 vCPU · 16 GiB
Snapshots: Shardflux:; Zipbox: No
Pause and resume: Shardflux:; Zipbox: No
SDKs: Shardflux: TypeScript, Python; Zipbox: TypeScript, Python, Go, Rust
Integrations: Shardflux: Claude Code, MCP, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK, LangChain; Zipbox: MCP, Claude Code, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK, LangChain

Full comparison

18 fields, at each provider's list price

Shardfluxshardflux.dev/#pricingshardflux.dev

Zipboxzipbox.ai/pricing

Pricing

vCPU, per hour: Shardflux: $0.04; Zipbox: $0.00685
RAM, per GiB-hour: Shardflux: $0.015; Zipbox: Included
Storage: Shardflux: Free; Zipbox: Free
Free tier: Shardflux: 30-day Pro trial, no card needed; Zipbox: $25 credit after a one-time $5 top-up
Paid plan from: Shardflux: $9 / month; Zipbox: Pay as you go
Billing: Shardflux: Active CPU time only; Zipbox: Bundled machine time

Limits

Max session: Shardflux: Not listed; Zipbox: No limit
Idle stop: Shardflux: After 5 minutes; Zipbox: Not listed
Largest sandbox: Shardflux: 32 vCPU · 64 GiB; Zipbox: 6 vCPU · 16 GiB
Concurrent sandboxes: Shardflux: Up to 200; Zipbox: Not listed

Platform

Isolation: Shardflux: Firecracker microVM; Zipbox: Firecracker microVM
GPU: Shardflux:; Zipbox: Not listed
Snapshots: Shardflux:; Zipbox: No
Pause and resume: Shardflux:; Zipbox: No

Developer

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

Trust

License: Shardflux: Not listed; Zipbox: Not listed
BYOC: Shardflux: Not listed; Zipbox: Not listed

Hourly cost

One sandbox running for one hour

Size

Shardflux

Zipbox

1 vCPU · 2 GiB: Shardflux: $0.070; Zipbox: $0.007
2 vCPU · 4 GiB: Shardflux: $0.140; Zipbox: $0.014
4 vCPU · 8 GiB: Shardflux: $0.280; Zipbox: $0.027

Compute only, at list rates.

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Which one fits

Based on the fields above

Shardflux fits when

You need GPUs.
You need snapshots.
You need pause and resume.
Your code waits a lot: CPU is billed only while it is in use.

Zipbox fits when

You want to pay only for usage, with no plan fee.
You want the lower list price: $0.014 against $0.140 an hour for 2 vCPU and 4 GiB.

More comparisons

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Shardflux

Zipbox

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

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