Cua Fleets vs Railway Sandboxes

Cua Fleets costs $0.044625 per vCPU-hour and Railway Sandboxes costs $0.069444 per vCPU-hour. Cua Fleets runs gVisor. Railway Sandboxes runs full VMs.

Updated

Cua Fleets

Isolation
gVisor
Free tier
Not listed
Max session
Not listed

Railway Sandboxes

Isolation
Full VM
Free tier
$5 trial credit for 30 days
Max session
Not listed

What is different

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

Cua Fleets
Railway Sandboxes
vCPU, per hour
Cua Fleets: $0.044625
Railway Sandboxes: $0.069444
RAM, per GiB-hour
Cua Fleets: $0.0223125
Railway Sandboxes: $0.069444
Billing
Cua Fleets: Per second
Railway Sandboxes: Active CPU time only
Largest sandbox
Cua Fleets: 8 vCPU · 32 GiB
Railway Sandboxes: 32 vCPU · 32 GiB
Isolation
Cua Fleets: gVisor
Railway Sandboxes: Full VM
SDKs
Cua Fleets: Python, TypeScript, Rust
Railway Sandboxes: TypeScript

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
Cua Fleets: $0.044625
Railway Sandboxes: $0.069444
RAM, per GiB-hour
Cua Fleets: $0.0223125
Railway Sandboxes: $0.069444
Storage
Cua Fleets: Free
Railway Sandboxes: Not listed
Free tier
Cua Fleets: Not listed
Railway Sandboxes: $5 trial credit for 30 days
Paid plan from
Cua Fleets: Not listed
Railway Sandboxes: $5 / month
Billing
Cua Fleets: Per second
Railway Sandboxes: Active CPU time only

Limits

Max session
Cua Fleets: Not listed
Railway Sandboxes: Not listed
Idle stop
Cua Fleets: Not listed
Railway Sandboxes: After 30 minutes
Largest sandbox
Cua Fleets: 8 vCPU · 32 GiB
Railway Sandboxes: 32 vCPU · 32 GiB
Concurrent sandboxes
Cua Fleets: Not listed
Railway Sandboxes: Up to 100

Platform

Isolation
Cua Fleets: gVisor
Railway Sandboxes: Full VM
GPU
Cua Fleets: Not listed
Railway Sandboxes: Not listed
Snapshots
Cua Fleets: Not listed
Railway Sandboxes:
Pause and resume
Cua Fleets: No
Railway Sandboxes: Not listed

Developer

SDKs
Cua Fleets: Python, TypeScript, Rust
Railway Sandboxes: TypeScript
Integrations
Cua Fleets: OpenAI Agents SDK, MCP
Railway Sandboxes: Not listed

Trust

License
Cua Fleets: Not listed
Railway Sandboxes: Not listed
BYOC
Cua Fleets: Your AWS, Google Cloud, or Modal account
Railway Sandboxes: Not listed

Hourly cost

One sandbox running for one hour

Cua Fleets
Railway Sandboxes
1 vCPU · 2 GiB
Cua Fleets: $0.089
Railway Sandboxes: $0.208
2 vCPU · 4 GiB
Cua Fleets: $0.179
Railway Sandboxes: $0.417
4 vCPU · 8 GiB
Cua Fleets: $0.357
Railway Sandboxes: $0.833

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Cua Fleets fits when

  • You use the OpenAI Agents SDK or MCP.
  • You want the lower list price: $0.179 against $0.417 an hour for 2 vCPU and 4 GiB.
  • You need a desktop in the sandbox.
  • You need the sandboxes in your own cloud account.

Railway Sandboxes fits when

  • You want each sandbox to be a full VM.
  • You need snapshots.
  • Your code waits a lot: CPU is billed only while it is in use.
  • You need a sandbox larger than 8 vCPU · 32 GiB.

More comparisons

See all comparisons

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