Blaxel vs Mosaic Sandbox

Blaxel bills memory only, at $0.0414 per GiB-hour. Mosaic Sandbox costs $0.025 per vCPU-hour. Blaxel runs microVMs and has no session limit. Mosaic Sandbox runs Firecracker microVMs.

Updated

Blaxel

Isolation
MicroVM
Free tier
Credit of up to $200
Max session
No limit

Mosaic Sandbox

Isolation
Firecracker microVM
Free tier
Not listed
Max session
Not listed

What is different

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

Blaxel
Mosaic Sandbox
vCPU, per hour
Blaxel: Included
Mosaic Sandbox: $0.025
RAM, per GiB-hour
Blaxel: $0.0414
Mosaic Sandbox: Included
Storage
Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.
Mosaic Sandbox: Free
Billing
Blaxel: Memory only
Mosaic Sandbox: Bundled machine time
Isolation
Blaxel: MicroVM
Mosaic Sandbox: Firecracker microVM
Integrations
Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP
Mosaic Sandbox: LangChain, MCP

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
Blaxel: Included
Mosaic Sandbox: $0.025
RAM, per GiB-hour
Blaxel: $0.0414
Mosaic Sandbox: Included
Storage
Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.
Mosaic Sandbox: Free
Free tier
Blaxel: Credit of up to $200
Mosaic Sandbox: Not listed
Paid plan from
Blaxel: Pay as you go
Mosaic Sandbox: Pay as you go
Billing
Blaxel: Memory only
Mosaic Sandbox: Bundled machine time

Limits

Max session
Blaxel: No limit
Mosaic Sandbox: Not listed
Idle stop
Blaxel: Not listed
Mosaic Sandbox: Not listed
Largest sandbox
Blaxel: Not listed
Mosaic Sandbox: 16 vCPU · 32 GiB
Concurrent sandboxes
Blaxel: Not listed
Mosaic Sandbox: Up to 200

Platform

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

Developer

SDKs
Blaxel: Python, TypeScript, Go
Mosaic Sandbox: Python, TypeScript, Go
Integrations
Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP
Mosaic Sandbox: LangChain, MCP

Trust

License
Blaxel: Not listed
Mosaic Sandbox: Not listed
BYOC
Blaxel: Bring-your-own-metal in your VPC
Mosaic Sandbox: Not listed

Hourly cost

One sandbox running for one hour

Blaxel
Mosaic Sandbox
1 vCPU · 2 GiB
Blaxel: $0.083
Mosaic Sandbox: $0.025
2 vCPU · 4 GiB
Blaxel: $0.166
Mosaic Sandbox: $0.050
4 vCPU · 8 GiB
Blaxel: $0.331
Mosaic Sandbox: $0.100

Compute only, at list rates.

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Which one fits

Based on the fields above

Blaxel fits when

  • You use the OpenAI Agents SDK or the Claude Agent SDK.
  • You need a desktop in the sandbox.
  • You need the sandboxes in your own cloud account.
  • You want one rate for memory, with CPU included.

Mosaic Sandbox fits when

  • You use LangChain.
  • You want the lower list price: $0.050 against $0.166 an hour for 2 vCPU and 4 GiB.

More comparisons

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