Mosaic Sandbox vs Runloop

Mosaic Sandbox costs $0.025 per vCPU-hour and Runloop costs $0.108 per vCPU-hour. Mosaic Sandbox runs Firecracker microVMs. Runloop runs microVMs.

Updated

Mosaic Sandbox

Isolation
Firecracker microVM
Free tier
Not listed
Max session
Not listed

Runloop

Isolation
MicroVM
Free tier
$50 credit
Max session
Not listed

What is different

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

Mosaic Sandbox
Runloop
vCPU, per hour
Mosaic Sandbox: $0.025
Runloop: $0.108
RAM, per GiB-hour
Mosaic Sandbox: Included
Runloop: $0.0252
Storage
Mosaic Sandbox: Free
Runloop: $0.00034236 per GiB-hour
Billing
Mosaic Sandbox: Bundled machine time
Runloop: Per second
Largest sandbox
Mosaic Sandbox: 16 vCPU · 32 GiB
Runloop: 16 vCPU · 64 GiB
Isolation
Mosaic Sandbox: Firecracker microVM
Runloop: MicroVM
SDKs
Mosaic Sandbox: Python, TypeScript, Go
Runloop: Python, TypeScript
Integrations
Mosaic Sandbox: LangChain, MCP
Runloop: OpenAI Agents SDK, MCP

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
Mosaic Sandbox: $0.025
Runloop: $0.108
RAM, per GiB-hour
Mosaic Sandbox: Included
Runloop: $0.0252
Storage
Mosaic Sandbox: Free
Runloop: $0.00034236 per GiB-hour
Free tier
Mosaic Sandbox: Not listed
Runloop: $50 credit
Paid plan from
Mosaic Sandbox: Pay as you go
Runloop: Pay as you go
Billing
Mosaic Sandbox: Bundled machine time
Runloop: Per second

Limits

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

Platform

Isolation
Mosaic Sandbox: Firecracker microVM
Runloop: MicroVM
GPU
Mosaic Sandbox: Not listed
Runloop: Not listed
Snapshots
Mosaic Sandbox:
Runloop:
Pause and resume
Mosaic Sandbox:
Runloop:

Developer

SDKs
Mosaic Sandbox: Python, TypeScript, Go
Runloop: Python, TypeScript
Integrations
Mosaic Sandbox: LangChain, MCP
Runloop: OpenAI Agents SDK, MCP

Trust

License
Mosaic Sandbox: Not listed
Runloop: Not listed
BYOC
Mosaic Sandbox: Not listed
Runloop: Deploy to VPC, Enterprise plan

Hourly cost

One sandbox running for one hour

Mosaic Sandbox
Runloop
1 vCPU · 2 GiB
Mosaic Sandbox: $0.025
Runloop: $0.158
2 vCPU · 4 GiB
Mosaic Sandbox: $0.050
Runloop: $0.317
4 vCPU · 8 GiB
Mosaic Sandbox: $0.100
Runloop: $0.634

Compute only, at list rates.

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Which one fits

Based on the fields above

Mosaic Sandbox fits when

  • You use LangChain.
  • You want the lower list price: $0.050 against $0.317 an hour for 2 vCPU and 4 GiB.

Runloop fits when

  • You use the OpenAI Agents SDK.
  • You need a desktop in the sandbox.
  • 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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