Shardflux vs Shellbox
Shardflux costs $0.04 per vCPU-hour and Shellbox costs $0.01 per vCPU-hour. Shardflux runs Firecracker microVMs and offers GPUs. Shellbox runs Firecracker microVMs and has no session limit.
Updated
Shardflux
- Isolation
- Firecracker microVM
- Free tier
- 30-day Pro trial, no card needed
- Max session
- Not listed
Shellbox
- Isolation
- Firecracker microVM
- Free tier
- Not listed
- Max session
- No limit
What is different
9 fields differ. The rest are the same or not listed.
Shardflux
Shellbox
- vCPU, per hour
- Shardflux: $0.04
- Shellbox: $0.01
- RAM, per GiB-hour
- Shardflux: $0.015
- Shellbox: Included
- Storage
- Shardflux: Free
- Shellbox: A stopped box costs $0.50 per x1 slot per month
- Paid plan from
- Shardflux: $9 / month
- Shellbox: Pay as you go
- Billing
- Shardflux: Active CPU time only
- Shellbox: Bundled machine time
- Idle stop
- Shardflux: After 5 minutes
- Shellbox: After 2 minutes
- Largest sandbox
- Shardflux: 32 vCPU · 64 GiB
- Shellbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Shardflux: Up to 200
- Shellbox: Up to 16
- Integrations
- Shardflux: Claude Code, MCP, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK, LangChain
- Shellbox: Claude Code
Full comparison
18 fields, at each provider's list price
Shardfluxshardflux
Shellboxshellbox
Pricing
- vCPU, per hour
- Shardflux: $0.04
- Shellbox: $0.01
- RAM, per GiB-hour
- Shardflux: $0.015
- Shellbox: Included
- Storage
- Shardflux: Free
- Shellbox: A stopped box costs $0.50 per x1 slot per month
- Free tier
- Shardflux: 30-day Pro trial, no card needed
- Shellbox: Not listed
- Paid plan from
- Shardflux: $9 / month
- Shellbox: Pay as you go
- Billing
- Shardflux: Active CPU time only
- Shellbox: Bundled machine time
Limits
- Max session
- Shardflux: Not listed
- Shellbox: No limit
- Idle stop
- Shardflux: After 5 minutes
- Shellbox: After 2 minutes
- Largest sandbox
- Shardflux: 32 vCPU · 64 GiB
- Shellbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Shardflux: Up to 200
- Shellbox: Up to 16
Platform
- Isolation
- Shardflux: Firecracker microVM
- Shellbox: Firecracker microVM
- GPU
- Shardflux:
- Shellbox: Not listed
- Snapshots
- Shardflux:
- Shellbox:
- Pause and resume
- Shardflux:
- Shellbox:
Developer
- SDKs
- Shardflux: TypeScript, Python
- Shellbox: Not listed
- Integrations
- Shardflux: Claude Code, MCP, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK, LangChain
- Shellbox: Claude Code
Trust
- License
- Shardflux: Not listed
- Shellbox: Not listed
- BYOC
- Shardflux: Not listed
- Shellbox: Not listed
Hourly cost
One sandbox running for one hour
Shardflux
Shellbox
- 1 vCPU · 2 GiB
- Shardflux: $0.070
- Shellbox: $0.010
- 2 vCPU · 4 GiB
- Shardflux: $0.140
- Shellbox: $0.020
- 4 vCPU · 8 GiB
- Shardflux: $0.280
- Shellbox: $0.040
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Shardflux fits when
- You need GPUs.
- You use MCP, the Claude Agent SDK, the OpenAI Agents SDK, the Vercel AI SDK or LangChain.
- You need a desktop in the sandbox.
- Your code waits a lot: CPU is billed only while it is in use.
Shellbox fits when
- You want to pay only for usage, with no plan fee.
- You want the lower list price: $0.020 against $0.140 an hour for 2 vCPU and 4 GiB.
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