Runloop vs Shardflux

Runloop costs $0.108 per vCPU-hour and Shardflux costs $0.04 per vCPU-hour. Runloop runs microVMs. Shardflux runs Firecracker microVMs and offers GPUs.

Updated Oct 15, 2026

Runloop

Devboxes built for coding agents.

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

Visit site Runloop profile

Shardflux

Serverless VMs for cloud agents that park when idle and keep their state.

Isolation: Firecracker microVM
Free tier: 30-day Pro trial, no card needed
Max session: Not listed

Visit site Shardflux profile

What is different

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

Field

Runloop

Shardflux

vCPU, per hour: Runloop: $0.108; Shardflux: $0.04
RAM, per GiB-hour: Runloop: $0.0252; Shardflux: $0.015
Storage: Runloop: $0.00034236 per GiB-hour; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Runloop: $50 credit; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Runloop: Pay as you go; Shardflux: $9 / month
Billing: Runloop: Per second; Shardflux: Active CPU time only
Largest sandbox: Runloop: 16 vCPU · 64 GiB; Shardflux: 32 vCPU · 64 GiB
Isolation: Runloop: MicroVM; Shardflux: Firecracker microVM
SDKs: Runloop: Python, TypeScript; Shardflux: TypeScript, Python
Integrations: Runloop: OpenAI Agents SDK, MCP, Claude Code; Shardflux: Claude Code, MCP

Full comparison

18 fields, at each provider's list price

Runlooprunloop.ai/pricing

Shardfluxshardflux.dev/#pricingshardflux.dev

Pricing

vCPU, per hour: Runloop: $0.108; Shardflux: $0.04
RAM, per GiB-hour: Runloop: $0.0252; Shardflux: $0.015
Storage: Runloop: $0.00034236 per GiB-hour; Shardflux: Retained storage is a monthly allowance per plan. No hourly storage rate is published.
Free tier: Runloop: $50 credit; Shardflux: 30-day Pro trial, no card needed
Paid plan from: Runloop: Pay as you go; Shardflux: $9 / month
Billing: Runloop: Per second; Shardflux: Active CPU time only

Limits

Max session: Runloop: Not listed; Shardflux: Not listed
Idle stop: Runloop: Not listed; Shardflux: Not listed
Largest sandbox: Runloop: 16 vCPU · 64 GiB; Shardflux: 32 vCPU · 64 GiB
Concurrent sandboxes: Runloop: Not listed; Shardflux: Up to 200

Platform

Isolation: Runloop: MicroVM; Shardflux: Firecracker microVM
GPU: Runloop: Not listed; Shardflux:
Snapshots: Runloop:; Shardflux:
Pause and resume: Runloop:; Shardflux:

Developer

SDKs: Runloop: Python, TypeScript; Shardflux: TypeScript, Python
Integrations: Runloop: OpenAI Agents SDK, MCP, Claude Code; Shardflux: Claude Code, MCP

Trust

License: Runloop: Not listed; Shardflux: Not listed
BYOC: Runloop: Deploy to VPC, Enterprise plan; Shardflux: Not listed

Hourly cost

One sandbox running for one hour

Size

Runloop

Shardflux

1 vCPU · 2 GiB: Runloop: $0.158; Shardflux: $0.070
2 vCPU · 4 GiB: Runloop: $0.317; Shardflux: $0.140
4 vCPU · 8 GiB: Runloop: $0.634; Shardflux: $0.280

Compute only, at list rates.

Open the calculator

Which one fits

Based on the fields above

Runloop fits when

You want to pay only for usage, with no plan fee.
You use the OpenAI Agents SDK.
You need the sandboxes in your own cloud account.
You need SOC 2 Type II, HIPAA and GDPR.

Shardflux fits when

You need GPUs.
You want the lower list price: $0.140 against $0.317 an hour for 2 vCPU and 4 GiB.
Your code waits a lot: CPU is billed only while it is in use.
You need a sandbox larger than 16 vCPU · 64 GiB.

More comparisons

See all comparisons

Runloop

Shardflux

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Runloop fits when

Shardflux fits when

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