Runtime vs Sandock

Runtime costs $0.025 per vCPU-hour. Runtime runs Firecracker microVMs and has no session limit. Sandock runs containers and limits a session to 8 hours.

Updated Oct 23, 2026

Runtime

Firecracker microVM sandboxes for AI agents, billed on the CPU that code uses.

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

Visit site Runtime profile

Sandock

Docker sandboxes with persistent volumes for AI agents.

Isolation: Container
Free tier: None
Max session: 8 hours

Visit site Sandock profile

What is different

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

Field

Runtime

Sandock

Free tier: Runtime: 100 hours of a 1 GB machine in the first 30 days; Sandock: None
Paid plan from: Runtime: Pay as you go; Sandock: $5 / month
Max session: Runtime: No limit; Sandock: 8 hours
Idle stop: Runtime: After 5 minutes; Sandock: After 30 minutes
Largest sandbox: Runtime: 16 vCPU · 64 GiB; Sandock: 8 vCPU · 8 GiB
Concurrent sandboxes: Runtime: Up to 200; Sandock: Up to 150
Isolation: Runtime: Firecracker microVM; Sandock: Container
SDKs: Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java; Sandock: TypeScript
Integrations: Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code; Sandock: MCP

Full comparison

18 fields, at each provider's list price

Runtimewithruntime.com/pricingwithruntime.com

Sandocksandock.ai/pricing

Pricing

vCPU, per hour: Runtime: $0.025; Sandock: Not listed
RAM, per GiB-hour: Runtime: $0.0075; Sandock: Not listed
Storage: Runtime: $0.000119 per GiB-hour after 10 free GiB; Sandock: Not listed
Free tier: Runtime: 100 hours of a 1 GB machine in the first 30 days; Sandock: None
Paid plan from: Runtime: Pay as you go; Sandock: $5 / month
Billing: Runtime: Active CPU time only; Sandock: Not listed

Limits

Max session: Runtime: No limit; Sandock: 8 hours
Idle stop: Runtime: After 5 minutes; Sandock: After 30 minutes
Largest sandbox: Runtime: 16 vCPU · 64 GiB; Sandock: 8 vCPU · 8 GiB
Concurrent sandboxes: Runtime: Up to 200; Sandock: Up to 150

Platform

Isolation: Runtime: Firecracker microVM; Sandock: Container
GPU: Runtime: No; Sandock: Not listed
Snapshots: Runtime:; Sandock: Not listed
Pause and resume: Runtime:; Sandock:

Developer

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

Trust

License: Runtime: Not listed; Sandock: MIT
BYOC: Runtime: Not listed; Sandock: Private / VPC deployment on Enterprise

Hourly cost

One sandbox running for one hour

Size

Runtime

Sandock

1 vCPU · 2 GiB: Runtime: $0.040; Sandock: Not listed
2 vCPU · 4 GiB: Runtime: $0.080; Sandock: Not listed
4 vCPU · 8 GiB: Runtime: $0.160; Sandock: Not listed

Compute only, at list rates.

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Which one fits

Based on the fields above

Runtime fits when

A session must run longer than 8 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, LangChain or Claude Code.

Sandock fits when

You want an open-source platform (MIT) that you can self-host.
You need the sandboxes in your own cloud account.

More comparisons

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Runtime

Sandock

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Runtime fits when

Sandock fits when

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