CreateOS Sandbox vs Wasmer
Wasmer is the better fit for many small, stateless web apps or PHP sites that need to start fast and cost little, and for embedding a Wasm runtime in your own product. CreateOS Sandbox is the better fit when agent code expects a full Linux machine: native binaries, package installs, a shell, and Docker preinstalled in devbox:1. The deciding question is whether your workload runs under WebAssembly/WASIX.
Pricing at a Glance
CreateOS rates verified 17 October 2026. Wasmer 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
- Compute
- $0.0362 /vCPU-hr
- Memory
- $0.0116 /GiB-hr
Wasmer
Wasmer Hobby is free; Pro is $10/month, then $0.50 per million requests, $0.10 per active CPU hour, $0.01 per GB-hour of provisioned memory and $0.10 per GB of bandwidth (its Edge page lists $0.05 per CPU hour), as of 17 October 2026.
Where CreateOS Sandbox Fits Better
What CreateOS Sandbox brings to this matchup, with a plain note on where Wasmer has the edge.
Runs ordinary Linux software. Wasmer workloads must target WebAssembly/WASIX.
Pause with memory and CPU state, then fork from the paused copy; Wasmer publishes neither.
Host-enforced egress allowlists; Wasmer does not publish egress controls.
Where Wasmer is strong
Density and start time. WebAssembly instances use a fraction of a container's or VM's memory (about 20 MB per sandbox, vendor-stated) and scale from zero, so many small stateless workloads run cheaply.
Which to Pick
Pick CreateOS Sandbox if
- The agent will pip install, apt install or run native binaries
- You want a persistent, pausable machine per session
- You need outbound traffic limited to named hosts
Pick Wasmer if
- Your workload compiles to WebAssembly and is stateless
- You host many small sites or PHP apps and want low cost
- You want an open-source runtime to embed in Rust, Python, Node.js or Swift
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 | Wasmer |
|---|---|---|
| Built for | API-created sandboxes for agent-written and untrusted code | Stateless web apps and sites on Wasmer Edge; an embeddable Wasm runtime |
| Isolation | Firecracker micro-VM with its own guest kernel | WebAssembly (WASIX) sandbox with its own process table, memory, handle map, network and threads |
| Ephemeral per-run environments | Yes. Create a sandbox per task by API, SDK, CLI or MCP and destroy it after | Apps are stateless and auto-scaled; per-task code environments not documented |
| Pause and resume | Yes. Saves disk, memory and CPU state; vCPU stops billing while paused, memory and storage still bill | Not published |
| Outbound network | Open with no rules; deny-by-default once any rule exists (host, IP, CIDR, wildcard), enforced on the host outside the VM | Not published |
| 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 by default) | Monthly plan plus requests, active CPU hours, provisioned memory GB-hours and bandwidth |
| Run untrusted code | Yes, the core use case; each sandbox is its own micro-VM | Wasm sandbox isolation; limits, egress controls and lifetimes for code execution not documented |
Common Questions
Can agent code that installs packages run on Wasmer Edge?
Only if it runs under WebAssembly/WASIX, which is Wasmer's execution model; arbitrary native binaries and Docker sit outside it. A CreateOS sandbox is a Linux micro-VM, and its devbox:1 image ships Python 3.12 with pip and uv, Node.js 24, Go, Rust and Docker.
How does Wasmer isolate workloads compared with CreateOS?
Wasmer gives each workload its own WASIX process table, memory, handle map, network and threads, while sharing compiled code pages across instances. CreateOS gives each sandbox a Firecracker micro-VM with its own guest kernel, root filesystem and network identity.
Does Wasmer have a free tier?
Yes. Wasmer's Hobby plan is free forever with 6 active CPU hours, 400 GB-hours of provisioned memory and 150 GB of bandwidth, at low execution priority. CreateOS has a Free plan with 500 credits, one concurrent sandbox up to 1 vCPU / 1 GB, and no card required.
Sources
Checked 17 October 2026.
See CreateOS Sandbox for yourself
Book a demo, or explore the Sandbox and its pricing.