Microsoft Foundry hosted agents vs Sailboxes
Microsoft Foundry hosted agents costs $0.0994 per vCPU-hour and Sailboxes costs $0.015 per vCPU-hour. Microsoft Foundry hosted agents runs microVMs. Sailboxes runs full VMs and has no session limit.
Updated
Microsoft Foundry hosted agents
- Isolation
- MicroVM
- Free tier
- Not listed
- Max session
- Not listed
Sailboxes
- Isolation
- Full VM
- Free tier
- $5 credit every month
- Max session
- No limit
What is different
7 fields differ. The rest are the same or not listed.
Microsoft Foundry hosted agents
Sailboxes
- vCPU, per hour
- Microsoft Foundry hosted agents: $0.0994
- Sailboxes: $0.015
- RAM, per GiB-hour
- Microsoft Foundry hosted agents: $0.0118
- Sailboxes: $0.008
- Largest sandbox
- Microsoft Foundry hosted agents: 2 vCPU · 4 GiB
- Sailboxes: 8 vCPU · 256 GiB
- Concurrent sandboxes
- Microsoft Foundry hosted agents: Up to 2,000
- Sailboxes: Up to 5,000
- Isolation
- Microsoft Foundry hosted agents: MicroVM
- Sailboxes: Full VM
- SDKs
- Microsoft Foundry hosted agents: Python, JavaScript / TypeScript
- Sailboxes: Python, TypeScript, Rust
- Integrations
- Microsoft Foundry hosted agents: Claude Agent SDK, LangChain, MCP, OpenAI Agents SDK
- Sailboxes: Claude Code
Full comparison
18 fields, at each provider's list price
Microsoft Foundry hosted agentsazure
Sailboxesdocs
Pricing
- vCPU, per hour
- Microsoft Foundry hosted agents: $0.0994
- Sailboxes: $0.015
- RAM, per GiB-hour
- Microsoft Foundry hosted agents: $0.0118
- Sailboxes: $0.008
- Storage
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: $0.0007 per GiB-hour
- Free tier
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: $5 credit every month
- Paid plan from
- Microsoft Foundry hosted agents: Pay as you go
- Sailboxes: Pay as you go
- Billing
- Microsoft Foundry hosted agents: Per second
- Sailboxes: Per second
Limits
- Max session
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: No limit
- Idle stop
- Microsoft Foundry hosted agents: After 15 minutes
- Sailboxes: Not listed
- Largest sandbox
- Microsoft Foundry hosted agents: 2 vCPU · 4 GiB
- Sailboxes: 8 vCPU · 256 GiB
- Concurrent sandboxes
- Microsoft Foundry hosted agents: Up to 2,000
- Sailboxes: Up to 5,000
Platform
- Isolation
- Microsoft Foundry hosted agents: MicroVM
- Sailboxes: Full VM
- GPU
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: Not listed
- Snapshots
- Microsoft Foundry hosted agents: Not listed
- Sailboxes:
- Pause and resume
- Microsoft Foundry hosted agents:
- Sailboxes:
Developer
- SDKs
- Microsoft Foundry hosted agents: Python, JavaScript / TypeScript
- Sailboxes: Python, TypeScript, Rust
- Integrations
- Microsoft Foundry hosted agents: Claude Agent SDK, LangChain, MCP, OpenAI Agents SDK
- Sailboxes: Claude Code
Trust
- License
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: Not listed
- BYOC
- Microsoft Foundry hosted agents: Not listed
- Sailboxes: Not listed
Hourly cost
One sandbox running for one hour
Microsoft Foundry hosted agents
Sailboxes
- 1 vCPU · 2 GiB
- Microsoft Foundry hosted agents: $0.123
- Sailboxes: $0.031
- 2 vCPU · 4 GiB
- Microsoft Foundry hosted agents: $0.246
- Sailboxes: $0.062
- 4 vCPU · 8 GiB
- Microsoft Foundry hosted agents: $0.492
- Sailboxes: $0.124
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Microsoft Foundry hosted agents fits when
- You want each sandbox in its own microVM.
- You use the Claude Agent SDK, LangChain, MCP or the OpenAI Agents SDK.
Sailboxes fits when
- You want each sandbox to be a full VM.
- You use Claude Code.
- You want the lower list price: $0.062 against $0.246 an hour for 2 vCPU and 4 GiB.
- You need snapshots.
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