Mosaic Sandbox vs Solari

Mosaic Sandbox costs $0.025 per vCPU-hour and Solari costs $0.0525 per vCPU-hour. Mosaic Sandbox runs Firecracker microVMs. Solari runs Cloud Hypervisor microVMs and limits a session to 24 hours.

Updated

Mosaic Sandbox

Isolation
Firecracker microVM
Free tier
Not listed
Max session
Not listed

Solari

Isolation
Cloud Hypervisor microVM
Free tier
$3 credit every month
Max session
24 hours

What is different

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

Mosaic Sandbox
Solari
vCPU, per hour
Mosaic Sandbox: $0.025
Solari: $0.0525
RAM, per GiB-hour
Mosaic Sandbox: Included
Solari: $0.0165
Storage
Mosaic Sandbox: Free
Solari: Snapshots $0.05 per GB-month, the first 10 GB per organization free, from October 1, 2026.
Paid plan from
Mosaic Sandbox: Pay as you go
Solari: $20 / month
Billing
Mosaic Sandbox: Bundled machine time
Solari: Per second
Largest sandbox
Mosaic Sandbox: 16 vCPU · 32 GiB
Solari: 8 vCPU · 16 GiB
Concurrent sandboxes
Mosaic Sandbox: Up to 200
Solari: Up to 10
Isolation
Mosaic Sandbox: Firecracker microVM
Solari: Cloud Hypervisor microVM
SDKs
Mosaic Sandbox: Python, TypeScript, Go
Solari: TypeScript, Python, Go, Rust
Integrations
Mosaic Sandbox: LangChain, MCP, Claude Code, Vercel AI SDK
Solari: MCP, Claude Code

Full comparison

18 fields, at each provider's list price

Pricing

vCPU, per hour
Mosaic Sandbox: $0.025
Solari: $0.0525
RAM, per GiB-hour
Mosaic Sandbox: Included
Solari: $0.0165
Storage
Mosaic Sandbox: Free
Solari: Snapshots $0.05 per GB-month, the first 10 GB per organization free, from October 1, 2026.
Free tier
Mosaic Sandbox: Not listed
Solari: $3 credit every month
Paid plan from
Mosaic Sandbox: Pay as you go
Solari: $20 / month
Billing
Mosaic Sandbox: Bundled machine time
Solari: Per second

Limits

Max session
Mosaic Sandbox: Not listed
Solari: 24 hours
Idle stop
Mosaic Sandbox: Not listed
Solari: Not listed
Largest sandbox
Mosaic Sandbox: 16 vCPU · 32 GiB
Solari: 8 vCPU · 16 GiB
Concurrent sandboxes
Mosaic Sandbox: Up to 200
Solari: Up to 10

Platform

Isolation
Mosaic Sandbox: Firecracker microVM
Solari: Cloud Hypervisor microVM
GPU
Mosaic Sandbox: No
Solari: Not listed
Snapshots
Mosaic Sandbox:
Solari:
Pause and resume
Mosaic Sandbox:
Solari:

Developer

SDKs
Mosaic Sandbox: Python, TypeScript, Go
Solari: TypeScript, Python, Go, Rust
Integrations
Mosaic Sandbox: LangChain, MCP, Claude Code, Vercel AI SDK
Solari: MCP, Claude Code

Trust

License
Mosaic Sandbox: Not listed
Solari: Not listed
BYOC
Mosaic Sandbox: Not listed
Solari: Enterprise plan, in your own VPC

Hourly cost

One sandbox running for one hour

Mosaic Sandbox
Solari
1 vCPU · 2 GiB
Mosaic Sandbox: $0.025
Solari: $0.086
2 vCPU · 4 GiB
Mosaic Sandbox: $0.050
Solari: $0.171
4 vCPU · 8 GiB
Mosaic Sandbox: $0.100
Solari: $0.342

Compute only, at list rates.

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Which one fits

Based on the fields above

Mosaic Sandbox fits when

  • You want to pay only for usage, with no plan fee.
  • You use LangChain or the Vercel AI SDK.
  • You want the lower list price: $0.050 against $0.171 an hour for 2 vCPU and 4 GiB.
  • You need a sandbox larger than 8 vCPU · 16 GiB.

Solari fits when

  • You need a desktop in the sandbox.
  • You need the sandboxes in your own cloud account.
  • You need HIPAA.

More comparisons

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