Runtime vs Solari
Runtime costs $0.025 per vCPU-hour and Solari costs $0.0525 per vCPU-hour. Runtime runs Firecracker microVMs and has no session limit. Solari runs Cloud Hypervisor microVMs and limits a session to 24 hours.
Updated
Runtime
- Isolation
- Firecracker microVM
- Free tier
- 100 hours of a 1 GB machine in the first 30 days
- Max session
- No limit
Solari
- Isolation
- Cloud Hypervisor microVM
- Free tier
- $3 credit every month
- Max session
- 24 hours
What is different
12 fields differ. The rest are the same or not listed.
Runtime
Solari
- vCPU, per hour
- Runtime: $0.025
- Solari: $0.0525
- RAM, per GiB-hour
- Runtime: $0.0075
- Solari: $0.0165
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Solari: Snapshots $0.05 per GB-month, the first 10 GB per organization free, from October 1, 2026.
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Solari: $3 credit every month
- Paid plan from
- Runtime: Pay as you go
- Solari: $20 / month
- Billing
- Runtime: Active CPU time only
- Solari: Per second
- Max session
- Runtime: No limit
- Solari: 24 hours
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Solari: 8 vCPU · 16 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Solari: Up to 10
- Isolation
- Runtime: Firecracker microVM
- Solari: Cloud Hypervisor microVM
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Solari: TypeScript, Python, Go, Rust
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Solari: MCP, Claude Code
Full comparison
18 fields, at each provider's list price
Runtimewithruntime
Solaridocs
Pricing
- vCPU, per hour
- Runtime: $0.025
- Solari: $0.0525
- RAM, per GiB-hour
- Runtime: $0.0075
- Solari: $0.0165
- Storage
- Runtime: $0.000119 per GiB-hour after 10 free GiB
- Solari: Snapshots $0.05 per GB-month, the first 10 GB per organization free, from October 1, 2026.
- Free tier
- Runtime: 100 hours of a 1 GB machine in the first 30 days
- Solari: $3 credit every month
- Paid plan from
- Runtime: Pay as you go
- Solari: $20 / month
- Billing
- Runtime: Active CPU time only
- Solari: Per second
Limits
- Max session
- Runtime: No limit
- Solari: 24 hours
- Idle stop
- Runtime: After 5 minutes
- Solari: Not listed
- Largest sandbox
- Runtime: 16 vCPU · 64 GiB
- Solari: 8 vCPU · 16 GiB
- Concurrent sandboxes
- Runtime: Up to 200
- Solari: Up to 10
Platform
- Isolation
- Runtime: Firecracker microVM
- Solari: Cloud Hypervisor microVM
- GPU
- Runtime: No
- Solari: Not listed
- Snapshots
- Runtime:
- Solari:
- Pause and resume
- Runtime:
- Solari:
Developer
- SDKs
- Runtime: JavaScript / TypeScript, Python, Go, Ruby, Java
- Solari: TypeScript, Python, Go, Rust
- Integrations
- Runtime: OpenAI Agents SDK, Vercel AI SDK, Claude Agent SDK, LangChain, MCP, Claude Code
- Solari: MCP, Claude Code
Trust
- License
- Runtime: Not listed
- Solari: Not listed
- BYOC
- Runtime: Not listed
- Solari: Enterprise plan, in your own VPC
Hourly cost
One sandbox running for one hour
Runtime
Solari
- 1 vCPU · 2 GiB
- Runtime: $0.040
- Solari: $0.086
- 2 vCPU · 4 GiB
- Runtime: $0.080
- Solari: $0.171
- 4 vCPU · 8 GiB
- Runtime: $0.160
- Solari: $0.342
Compute only, at list rates.
Open the calculatorWhich one fits
Based on the fields above
Runtime fits when
- A session must run longer than 24 hours.
- You want to pay only for usage, with no plan fee.
- You use the OpenAI Agents SDK, the Vercel AI SDK, the Claude Agent SDK or LangChain.
- You want the lower list price: $0.080 against $0.171 an hour for 2 vCPU and 4 GiB.
Solari fits when
- You need the sandboxes in your own cloud account.
- You need HIPAA.
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