DigitalOcean Harness Runtime vs Phonebox

DigitalOcean Harness Runtime costs $0.044 per vCPU-hour. DigitalOcean Harness Runtime runs Firecracker microVMs. Phonebox limits a session to 3 hours.

Updated Oct 15, 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

Phonebox

Cloud Android phones that AI agents control through their screens.

Isolation: Not listed
Free tier: $2 starter credit, one time, no card
Max session: 3 hours

Visit site Phonebox profile

What is different

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

Field

DigitalOcean Harness Runtime

Phonebox

Billing: DigitalOcean Harness Runtime: Active CPU time only; Phonebox: Bundled machine time
Idle stop: DigitalOcean Harness Runtime: After 15 minutes; Phonebox: After 5 minutes
Concurrent sandboxes: DigitalOcean Harness Runtime: Up to 100; Phonebox: Up to 5
SDKs: DigitalOcean Harness Runtime: Python; Phonebox: TypeScript
Integrations: DigitalOcean Harness Runtime: Claude Code; Phonebox: MCP

Full comparison

18 fields, at each provider's list price

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

Phoneboxphonebox.dev/pricingphonebox.dev

Pricing

vCPU, per hour: DigitalOcean Harness Runtime: $0.044; Phonebox: Not listed
RAM, per GiB-hour: DigitalOcean Harness Runtime: $0.0095; Phonebox: Not listed
Storage: DigitalOcean Harness Runtime: Session volumes $0.05 per GiB-month; Phonebox: Not listed
Free tier: DigitalOcean Harness Runtime: Not listed; Phonebox: $2 starter credit, one time, no card
Paid plan from: DigitalOcean Harness Runtime: Pay as you go; Phonebox: Pay as you go
Billing: DigitalOcean Harness Runtime: Active CPU time only; Phonebox: Bundled machine time

Limits

Max session: DigitalOcean Harness Runtime: Not listed; Phonebox: 3 hours
Idle stop: DigitalOcean Harness Runtime: After 15 minutes; Phonebox: After 5 minutes
Largest sandbox: DigitalOcean Harness Runtime: 16 vCPU · 32 GiB; Phonebox: Not listed
Concurrent sandboxes: DigitalOcean Harness Runtime: Up to 100; Phonebox: Up to 5

Platform

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

Developer

SDKs: DigitalOcean Harness Runtime: Python; Phonebox: TypeScript
Integrations: DigitalOcean Harness Runtime: Claude Code; Phonebox: MCP

Trust

License: DigitalOcean Harness Runtime: Not listed; Phonebox: Not listed
BYOC: DigitalOcean Harness Runtime: Not listed; Phonebox: Not listed

Hourly cost

One sandbox running for one hour

Size

DigitalOcean Harness Runtime

Phonebox

1 vCPU · 2 GiB: DigitalOcean Harness Runtime: $0.063; Phonebox: Not listed
2 vCPU · 4 GiB: DigitalOcean Harness Runtime: $0.126; Phonebox: Not listed
4 vCPU · 8 GiB: DigitalOcean Harness Runtime: $0.252; Phonebox: Not listed

Compute only, at list rates.

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Which one fits

Based on the fields above

DigitalOcean Harness Runtime fits when

You use Claude Code.
You need snapshots.
Your code waits a lot: CPU is billed only while it is in use.

Phonebox fits when

You use MCP.

More comparisons

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DigitalOcean Harness Runtime

Phonebox

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

DigitalOcean Harness Runtime fits when

Phonebox fits when

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