Brimble Sandboxes vs Runtime

Runtime costs $0.025 per vCPU-hour. Brimble Sandboxes runs gVisor and limits a session to 6 hours. Runtime runs Firecracker microVMs and has no session limit.

Updated

Brimble Sandboxes

Isolation
gVisor
Free tier
7-day Developer plan trial, card required
Max session
6 hours

Runtime

Isolation
Firecracker microVM
Free tier
100 hours of a 1 GB machine in the first 30 days
Max session
No limit

What is different

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

Brimble Sandboxes
Runtime
Storage
Brimble Sandboxes: Snapshot storage and persistent volumes bill at storage rates
Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier
Brimble Sandboxes: 7-day Developer plan trial, card required
Runtime: 100 hours of a 1 GB machine in the first 30 days
Paid plan from
Brimble Sandboxes: $3 / month
Runtime: Pay as you go
Billing
Brimble Sandboxes: Per second
Runtime: Active CPU time only
Max session
Brimble Sandboxes: 6 hours
Runtime: No limit
Largest sandbox
Brimble Sandboxes: 4 vCPU · 8 GiB
Runtime: 16 vCPU · 64 GiB
Concurrent sandboxes
Brimble Sandboxes: Up to 15
Runtime: Up to 200
Isolation
Brimble Sandboxes: gVisor
Runtime: Firecracker microVM
SDKs
Brimble Sandboxes: JavaScript / TypeScript, Python, Go
Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations
Brimble Sandboxes: MCP, Claude Code
Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
Brimble Sandboxes: Not listed
Runtime: $0.025
RAM, per GiB-hour
Brimble Sandboxes: Not listed
Runtime: $0.0075
Storage
Brimble Sandboxes: Snapshot storage and persistent volumes bill at storage rates
Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier
Brimble Sandboxes: 7-day Developer plan trial, card required
Runtime: 100 hours of a 1 GB machine in the first 30 days
Paid plan from
Brimble Sandboxes: $3 / month
Runtime: Pay as you go
Billing
Brimble Sandboxes: Per second
Runtime: Active CPU time only

Limits

Max session
Brimble Sandboxes: 6 hours
Runtime: No limit
Idle stop
Brimble Sandboxes: Not listed
Runtime: After 5 minutes
Largest sandbox
Brimble Sandboxes: 4 vCPU · 8 GiB
Runtime: 16 vCPU · 64 GiB
Concurrent sandboxes
Brimble Sandboxes: Up to 15
Runtime: Up to 200

Platform

Isolation
Brimble Sandboxes: gVisor
Runtime: Firecracker microVM
GPU
Brimble Sandboxes: Not listed
Runtime: No
Snapshots
Brimble Sandboxes:
Runtime:
Pause and resume
Brimble Sandboxes:
Runtime:

Developer

SDKs
Brimble Sandboxes: JavaScript / TypeScript, Python, Go
Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations
Brimble Sandboxes: MCP, Claude Code
Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code

Trust

License
Brimble Sandboxes: Not listed
Runtime: Not listed
BYOC
Brimble Sandboxes: Not listed
Runtime: Not listed

Hourly cost

One sandbox running for one hour

Brimble Sandboxes
Runtime
1 vCPU · 2 GiB
Brimble Sandboxes: Not listed
Runtime: $0.040
2 vCPU · 4 GiB
Brimble Sandboxes: Not listed
Runtime: $0.080
4 vCPU · 8 GiB
Brimble Sandboxes: Not listed
Runtime: $0.160

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Runtime fits when

  • A session must run longer than 6 hours.
  • You want to pay only for usage, with no plan fee.
  • You want each sandbox in its own microVM.
  • You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK or LangChain.

More comparisons

See all comparisons

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