Freestyle VMs vs Mosaic Sandbox
Freestyle VMs costs $0.04032 per vCPU-hour and Mosaic Sandbox costs $0.025 per vCPU-hour. Freestyle VMs runs full VMs. Mosaic Sandbox runs Firecracker microVMs.
Updated
Freestyle VMs
- Isolation
- Full VM
- Free tier
- Free plan, $0 forever
- Max session
- Not listed
Mosaic Sandbox
- Isolation
- Firecracker microVM
- Free tier
- Not listed
- Max session
- Not listed
What is different
10 fields differ. The rest are the same or not listed.
Freestyle VMs
Mosaic Sandbox
- vCPU, per hour
- Freestyle VMs: $0.04032
- Mosaic Sandbox: $0.025
- RAM, per GiB-hour
- Freestyle VMs: $0.0129
- Mosaic Sandbox: Included
- Storage
- Freestyle VMs: $0.000086 per GiB-hour
- Mosaic Sandbox: Free
- Paid plan from
- Freestyle VMs: $50 / month
- Mosaic Sandbox: Pay as you go
- Billing
- Freestyle VMs: Per second
- Mosaic Sandbox: Bundled machine time
- Largest sandbox
- Freestyle VMs: 32 vCPU · 64 GiB
- Mosaic Sandbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Freestyle VMs: Up to 400
- Mosaic Sandbox: Up to 200
- Isolation
- Freestyle VMs: Full VM
- Mosaic Sandbox: Firecracker microVM
- SDKs
- Freestyle VMs: JavaScript
- Mosaic Sandbox: Python, TypeScript, Go
- Integrations
- Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK, Claude Code
- Mosaic Sandbox: LangChain, MCP
Full comparison
18 fields, at each provider's list price
Freestyle VMsfreestyle
Mosaic Sandboxsandbox
Pricing
- vCPU, per hour
- Freestyle VMs: $0.04032
- Mosaic Sandbox: $0.025
- RAM, per GiB-hour
- Freestyle VMs: $0.0129
- Mosaic Sandbox: Included
- Storage
- Freestyle VMs: $0.000086 per GiB-hour
- Mosaic Sandbox: Free
- Free tier
- Freestyle VMs: Free plan, $0 forever
- Mosaic Sandbox: Not listed
- Paid plan from
- Freestyle VMs: $50 / month
- Mosaic Sandbox: Pay as you go
- Billing
- Freestyle VMs: Per second
- Mosaic Sandbox: Bundled machine time
Limits
- Max session
- Freestyle VMs: Not listed
- Mosaic Sandbox: Not listed
- Idle stop
- Freestyle VMs: Not listed
- Mosaic Sandbox: Not listed
- Largest sandbox
- Freestyle VMs: 32 vCPU · 64 GiB
- Mosaic Sandbox: 16 vCPU · 32 GiB
- Concurrent sandboxes
- Freestyle VMs: Up to 400
- Mosaic Sandbox: Up to 200
Platform
- Isolation
- Freestyle VMs: Full VM
- Mosaic Sandbox: Firecracker microVM
- GPU
- Freestyle VMs: Not listed
- Mosaic Sandbox: Not listed
- Snapshots
- Freestyle VMs:
- Mosaic Sandbox:
- Pause and resume
- Freestyle VMs:
- Mosaic Sandbox:
Developer
- SDKs
- Freestyle VMs: JavaScript
- Mosaic Sandbox: Python, TypeScript, Go
- Integrations
- Freestyle VMs: OpenAI Agents SDK, Claude Agent SDK, Claude Code
- Mosaic Sandbox: LangChain, MCP
Trust
- License
- Freestyle VMs: Not listed
- Mosaic Sandbox: Not listed
- BYOC
- Freestyle VMs: Not listed
- Mosaic Sandbox: Not listed
Hourly cost
One sandbox running for one hour
Freestyle VMs
Mosaic Sandbox
- 1 vCPU · 2 GiB
- Freestyle VMs: $0.066
- Mosaic Sandbox: $0.025
- 2 vCPU · 4 GiB
- Freestyle VMs: $0.132
- Mosaic Sandbox: $0.050
- 4 vCPU · 8 GiB
- Freestyle VMs: $0.264
- Mosaic Sandbox: $0.100
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Freestyle VMs fits when
- You want each sandbox to be a full VM.
- You use the OpenAI Agents SDK, the Claude Agent SDK or Claude Code.
- You need a desktop in the sandbox.
- You need a sandbox larger than 16 vCPU · 32 GiB.
Mosaic Sandbox fits when
- You want to pay only for usage, with no plan fee.
- You want each sandbox in its own microVM.
- You use LangChain or MCP.
- You want the lower list price: $0.050 against $0.132 an hour for 2 vCPU and 4 GiB.
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