DigitalOcean Harness Runtime vs LangSmith Sandboxes

DigitalOcean Harness Runtime costs $0.044 per vCPU-hour and LangSmith Sandboxes costs $0.0576 per vCPU-hour. DigitalOcean Harness Runtime runs Firecracker microVMs. LangSmith Sandboxes runs Firecracker microVMs.

Updated Oct 14, 2026

DigitalOcean Harness Runtime

Managed microVM sandboxes for AI agents and their code.

Isolation: Firecracker microVM
Free tier: Not listed
Max session: Not listed

Visit site DigitalOcean Harness Runtime profile

LangSmith Sandboxes

Isolated sandboxes for running agent-generated code.

Isolation: Firecracker microVM
Free tier: Credit of 8 LSU every month
Max session: Not listed

Visit site LangSmith Sandboxes profile

What is different

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

Field

DigitalOcean Harness Runtime

LangSmith Sandboxes

vCPU, per hour: DigitalOcean Harness Runtime: $0.044; LangSmith Sandboxes: $0.0576
RAM, per GiB-hour: DigitalOcean Harness Runtime: $0.0095; LangSmith Sandboxes: $0.01845
Storage: DigitalOcean Harness Runtime: Session volumes $0.05 per GiB-month; LangSmith Sandboxes: $0.000123 per GiB-hour
Billing: DigitalOcean Harness Runtime: Active CPU time only; LangSmith Sandboxes: Per second
Idle stop: DigitalOcean Harness Runtime: After 15 minutes; LangSmith Sandboxes: After 10 minutes
Largest sandbox: DigitalOcean Harness Runtime: 16 vCPU · 32 GiB; LangSmith Sandboxes: 16 vCPU · 64 GiB
SDKs: DigitalOcean Harness Runtime: Python; LangSmith Sandboxes: Python, TypeScript
Integrations: DigitalOcean Harness Runtime: Claude Code; LangSmith Sandboxes: LangChain

Full comparison

18 fields, at each provider's list price

DigitalOcean Harness Runtimedigitalocean.com/pricing/harness-runtimedigitalocean.com

LangSmith Sandboxeslangchain.com/pricinglangchain.com

Pricing

vCPU, per hour: DigitalOcean Harness Runtime: $0.044; LangSmith Sandboxes: $0.0576
RAM, per GiB-hour: DigitalOcean Harness Runtime: $0.0095; LangSmith Sandboxes: $0.01845
Storage: DigitalOcean Harness Runtime: Session volumes $0.05 per GiB-month; LangSmith Sandboxes: $0.000123 per GiB-hour
Free tier: DigitalOcean Harness Runtime: Not listed; LangSmith Sandboxes: Credit of 8 LSU every month
Paid plan from: DigitalOcean Harness Runtime: Pay as you go; LangSmith Sandboxes: Not listed
Billing: DigitalOcean Harness Runtime: Active CPU time only; LangSmith Sandboxes: Per second

Limits

Max session: DigitalOcean Harness Runtime: Not listed; LangSmith Sandboxes: Not listed
Idle stop: DigitalOcean Harness Runtime: After 15 minutes; LangSmith Sandboxes: After 10 minutes
Largest sandbox: DigitalOcean Harness Runtime: 16 vCPU · 32 GiB; LangSmith Sandboxes: 16 vCPU · 64 GiB
Concurrent sandboxes: DigitalOcean Harness Runtime: Up to 100; LangSmith Sandboxes: Not listed

Platform

Isolation: DigitalOcean Harness Runtime: Firecracker microVM; LangSmith Sandboxes: Firecracker microVM
GPU: DigitalOcean Harness Runtime: Not listed; LangSmith Sandboxes: Not listed
Snapshots: DigitalOcean Harness Runtime:; LangSmith Sandboxes:
Pause and resume: DigitalOcean Harness Runtime:; LangSmith Sandboxes:

Developer

SDKs: DigitalOcean Harness Runtime: Python; LangSmith Sandboxes: Python, TypeScript
Integrations: DigitalOcean Harness Runtime: Claude Code; LangSmith Sandboxes: LangChain

Trust

License: DigitalOcean Harness Runtime: Not listed; LangSmith Sandboxes: Not listed
BYOC: DigitalOcean Harness Runtime: Not listed; LangSmith Sandboxes: Enterprise plan

Hourly cost

One sandbox running for one hour

Size

DigitalOcean Harness Runtime

LangSmith Sandboxes

1 vCPU · 2 GiB: DigitalOcean Harness Runtime: $0.063; LangSmith Sandboxes: $0.095
2 vCPU · 4 GiB: DigitalOcean Harness Runtime: $0.126; LangSmith Sandboxes: $0.189
4 vCPU · 8 GiB: DigitalOcean Harness Runtime: $0.252; LangSmith Sandboxes: $0.378

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

DigitalOcean Harness Runtime fits when

You use Claude Code.
You want the lower list price: $0.126 against $0.189 an hour for 2 vCPU and 4 GiB.
Your code waits a lot: CPU is billed only while it is in use.

LangSmith Sandboxes fits when

You use LangChain.
You need the sandboxes in your own cloud account.
You need a sandbox larger than 16 vCPU · 32 GiB.

More comparisons

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DigitalOcean Harness Runtime

LangSmith Sandboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

DigitalOcean Harness Runtime fits when

LangSmith Sandboxes fits when

More comparisons

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