Isorun vs Runtime

Isorun costs $0.025 per vCPU-hour and Runtime costs $0.025 per vCPU-hour. Isorun runs microVMs. Runtime runs Firecracker microVMs and has no session limit.

Updated Oct 23, 2026

Isorun

Isolated Linux microVMs from any Docker image.

Isolation: MicroVM
Free tier: $50 credit
Max session: Not listed

Visit site Isorun profile

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

What is different

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

Field

Isorun

Runtime

RAM, per GiB-hour: Isorun: $0.015; Runtime: $0.0075
Storage: Isorun: Persistent disk $0.02 per GB-month for data stored; Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier: Isorun: $50 credit; Runtime: 100 hours of a 1 GB machine in the first 30 days
Billing: Isorun: Per second; Runtime: Active CPU time only
Isolation: Isorun: MicroVM; Runtime: Firecracker microVM
SDKs: Isorun: TypeScript; Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
Integrations: Isorun: LangChain, OpenAI Agents SDK, MCP; Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code

Full comparison

18 fields, at each provider's list price

Isorundocs.isorun.ai/getting-started/pricingdocs.isorun.ai

Runtimewithruntime.com/pricingwithruntime.com

Pricing

vCPU, per hour: Isorun: $0.025; Runtime: $0.025
RAM, per GiB-hour: Isorun: $0.015; Runtime: $0.0075
Storage: Isorun: Persistent disk $0.02 per GB-month for data stored; Runtime: $0.000119 per GiB-hour after 10 free GiB
Free tier: Isorun: $50 credit; Runtime: 100 hours of a 1 GB machine in the first 30 days
Paid plan from: Isorun: Pay as you go; Runtime: Pay as you go
Billing: Isorun: Per second; Runtime: Active CPU time only

Limits

Max session: Isorun: Not listed; Runtime: No limit
Idle stop: Isorun: After 5 minutes; Runtime: After 5 minutes
Largest sandbox: Isorun: Not listed; Runtime: 16 vCPU · 64 GiB
Concurrent sandboxes: Isorun: Not listed; Runtime: Up to 200

Platform

Isolation: Isorun: MicroVM; Runtime: Firecracker microVM
GPU: Isorun: Not listed; Runtime: No
Snapshots: Isorun:; Runtime:
Pause and resume: Isorun:; Runtime:

Developer

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

Trust

License: Isorun: Not listed; Runtime: Not listed
BYOC: Isorun: Not listed; Runtime: Not listed

Hourly cost

One sandbox running for one hour

Size

Isorun

Runtime

1 vCPU · 2 GiB: Isorun: $0.055; Runtime: $0.040
2 vCPU · 4 GiB: Isorun: $0.110; Runtime: $0.080
4 vCPU · 8 GiB: Isorun: $0.220; Runtime: $0.160

Compute only, at list rates.

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Which one fits

Based on the fields above

Runtime fits when

You use the Vercel AI SDK, the Claude Agent SDK or Claude Code.
You want the lower list price: $0.080 against $0.110 an hour for 2 vCPU and 4 GiB.
Your code waits a lot: CPU is billed only while it is in use.

More comparisons

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Isorun

Runtime

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Runtime fits when

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