InstaVM vs Railway Sandboxes

InstaVM costs $0.0504 per vCPU-hour and Railway Sandboxes costs $0.069444 per vCPU-hour. InstaVM runs Firecracker microVMs. Railway Sandboxes runs full VMs.

Updated Oct 14, 2026

InstaVM

Hardware-isolated microVMs for AI agent code.

Isolation: Firecracker microVM
Free tier: $50 credit
Max session: Not listed

Visit site InstaVM profile

Railway Sandboxes

Isolated Linux VMs you create on demand and destroy.

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

Visit site Railway Sandboxes profile

What is different

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

Field

InstaVM

Railway Sandboxes

vCPU, per hour: InstaVM: $0.0504; Railway Sandboxes: $0.069444
RAM, per GiB-hour: InstaVM: $0.0162; Railway Sandboxes: $0.069444
Free tier: InstaVM: $50 credit; Railway Sandboxes: $5 trial credit for 30 days
Paid plan from: InstaVM: $100 / month; Railway Sandboxes: $5 / month
Billing: InstaVM: Per second; Railway Sandboxes: Active CPU time only
Isolation: InstaVM: Firecracker microVM; Railway Sandboxes: Full VM
SDKs: InstaVM: Python, TypeScript; Railway Sandboxes: TypeScript

Full comparison

18 fields, at each provider's list price

InstaVMinstavm.io/pricing

Railway Sandboxesrailway.com/pricingrailway.com

Pricing

vCPU, per hour: InstaVM: $0.0504; Railway Sandboxes: $0.069444
RAM, per GiB-hour: InstaVM: $0.0162; Railway Sandboxes: $0.069444
Storage: InstaVM: $0.0002 per GiB-hour after 10 free GiB; Railway Sandboxes: Not listed
Free tier: InstaVM: $50 credit; Railway Sandboxes: $5 trial credit for 30 days
Paid plan from: InstaVM: $100 / month; Railway Sandboxes: $5 / month
Billing: InstaVM: Per second; Railway Sandboxes: Active CPU time only

Limits

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

Platform

Isolation: InstaVM: Firecracker microVM; Railway Sandboxes: Full VM
GPU: InstaVM: Not listed; Railway Sandboxes: Not listed
Snapshots: InstaVM:; Railway Sandboxes:
Pause and resume: InstaVM:; Railway Sandboxes: Not listed

Developer

SDKs: InstaVM: Python, TypeScript; Railway Sandboxes: TypeScript
Integrations: InstaVM: Not listed; Railway Sandboxes: Not listed

Trust

License: InstaVM: Not listed; Railway Sandboxes: Not listed
BYOC: InstaVM: Not listed; Railway Sandboxes: Not listed

Hourly cost

One sandbox running for one hour

Size

InstaVM

Railway Sandboxes

1 vCPU · 2 GiB: InstaVM: $0.083; Railway Sandboxes: $0.208
2 vCPU · 4 GiB: InstaVM: $0.166; Railway Sandboxes: $0.417
4 vCPU · 8 GiB: InstaVM: $0.331; Railway Sandboxes: $0.833

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

InstaVM fits when

You want each sandbox in its own microVM.
You want the lower list price: $0.166 against $0.417 an hour for 2 vCPU and 4 GiB.
You need pause and resume.
You need a desktop in the sandbox.

Railway Sandboxes fits when

You want each sandbox to be a full VM.
Your code waits a lot: CPU is billed only while it is in use.

More comparisons

See all comparisons

InstaVM

Railway Sandboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

InstaVM fits when

Railway Sandboxes fits when

More comparisons

Related

Compare

Pricing

Browse