CreateOS Sandbox vs Solari
Pick Solari if your agents mix stealth browsing, code execution and GUI desktops and you want one vendor and one bill for all three. Pick CreateOS Sandbox if your sandboxes need to run past Solari's plan session caps, sit behind a host-enforced egress allowlist, or live in an EU region.
Pricing at a Glance
CreateOS rates verified 17 October 2026. Solari pricing as published on 17 October 2026. Rates billed per GB rather than per GiB, or as bundled sizes, are quoted as published rather than converted.
CreateOS Sandbox
Lower compute rate- Compute
- $0.0362 /vCPU-hr
- Memory
- $0.0116 /GiB-hr
Solari
- Compute
- $0.0525 /vCPU-hr
- Memory
- See below
Solari bills per second at $0.0525 per vCPU-hour and $0.0165 per GB-hour on Free, falling to $0.0175 and $0.0055 on Enterprise, with plans from $0 to $200 per month, as of 17 October 2026.
Where CreateOS Sandbox Fits Better
What CreateOS Sandbox brings to this matchup, with a plain note on where Solari has the edge.
No lifetime cap on any plan, where Solari limits sessions to 1 hour on Free, 5 hours on Starter and 24 hours on Professional.
Outbound allowlists by host, IP, CIDR or wildcard apply to every code sandbox and are enforced on the host outside the VM; Solari documents its domain allowlist only for Enterprise browser sessions.
Two managed regions, eu and us, against Solari's single US West (Oregon) region.
Where Solari is strong
Solari puts stealth cloud browsers, headless sandboxes and full GUI desktops behind one account and one credit balance, with snapshot, revert and fork on every machine type, and its docs are unusually candid about edge cases.
Which to Pick
Pick CreateOS Sandbox if
- Agent sessions regularly run longer than 24 hours, or longer than 5 hours on a small plan.
- You need an outbound allowlist on code sandboxes without an Enterprise contract.
- Your data or users call for an EU region.
Pick Solari if
- Your agents need stealth browser sessions, code sandboxes and Linux desktops from one vendor and one bill.
- You will run on Professional or Enterprise, where Solari's per vCPU-hour rate ($0.0245 or $0.0175) lists below CreateOS's.
- You want paused sandboxes left out of the concurrency count, which Solari's pricing page states.
Head-to-Head Comparison
Every dimension side by side, checked on 17 October 2026 against each vendor's own docs and pricing pages. "Not published" means we could not find it on the vendor's pages, not that the feature is missing.
| Dimension | CreateOS Sandbox | Solari |
|---|---|---|
| Isolation | Firecracker micro-VM with its own guest kernel, root filesystem and network identity | Cloud Hypervisor microVM per sandbox on the default dedicated tier; a cheaper shared tier runs sandboxes as namespace and cgroup processes inside a VM shared only with your org |
| Pause and resume | Saves disk, memory and CPU state; vCPU stops billing while paused, memory and storage still bill | Pause saves memory and disk and is the default idle action; named snapshots and revert in place |
| Fork | Fork a paused sandbox into many independent copies, each with its own id and IP | Create any number of independent machines from a snapshot (fromSnapshot) |
| Outbound network default | Open with no rules; deny-by-default once any host, IP, CIDR or wildcard rule exists, enforced on the host outside the VM | Default not stated for sandboxes; the hardened tier blocks all outbound. Domain allowlist documented only for Enterprise stealth browser sessions |
| Inbound access | Closed by default; opt-in public HTTPS URL, plus API-authenticated shell and port tunnels | previewUrl(port) signed with a one-hour token; opt-in tokenless public port through the REST API |
| Largest size | 8 vCPU / 16 GB on Enterprise (Pro 8 vCPU / 8 GB, Beginner 4 / 4, Free 1 / 1) | 8 vCPU / 16 GB per dedicated sandbox; shared tier up to 4 vCPU / 2 GB |
| Concurrency | Free 1, Beginner 5, Pro 20, Enterprise 30; paused sandboxes count toward the cap | Free 1, Starter 2, Professional 10, Enterprise 50+; paused sandboxes do not count |
| Session length | No lifetime cap; optional idle auto-pause from 60 s to 24 h, off by default | Free 1 hour, Starter 5 hours, Professional 24 hours, Enterprise unlimited; 30-minute idle timeout by default |
| Billing | Per second: $0.03616363/vCPU-hr, $0.01159025/GiB-hr, storage $0.0001584/GB-hr; no egress fees, 50 GiB bandwidth budget per sandbox | Per second; $0.0525 to $0.0175 per vCPU-hour and $0.0165 to $0.0055 per GB-hour depending on plan |
| SDKs and interfaces | TypeScript, Go, Python, Rust, C#, Java (all but TypeScript pre-1.0), CLI, MCP, REST | TypeScript and Python (full parity), Go, Rust and C++ (core features), REST, control WebSocket, MCP server |
Common Questions
Does Solari cap how long a sandbox can run?
Yes, on most plans. Solari lists a maximum session of 1 hour on Free, 5 hours on Starter and 24 hours on Professional, with Enterprise unlimited. CreateOS Sandbox has no lifetime cap; a sandbox runs until you destroy it, pause it, or an optional idle auto-pause fires.
Can I restrict outbound traffic from a Solari code sandbox?
Only in part. Solari's hardened tier blocks all outbound traffic, and its per-domain allowlist is documented for Enterprise stealth browser sessions only. CreateOS Sandbox accepts host, IP, CIDR and wildcard rules on any sandbox; once one rule exists, everything else is denied on the host, outside the VM.
Is Solari cheaper per vCPU-hour than CreateOS Sandbox?
On its paid plans, yes. Solari charges $0.0525 per vCPU-hour on Free, $0.035 on Starter, $0.0245 on Professional and $0.0175 on Enterprise. CreateOS Sandbox charges $0.03616363 on every plan, so Solari's Starter and higher list below it and its Free rate lists above.
Do paused Solari sandboxes count toward the running limit?
No, Solari says paused sandboxes do not count, though parked ones do. CreateOS Sandbox works the other way: every sandbox that is not destroyed, paused ones included, counts toward the plan cap of 1, 5, 20 or 30, so destroy what you no longer need.
Sources
Checked 17 October 2026.
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