Wasmtime vs WinterJS: Which Should You Choose in 2026?
Choosing between Wasmtime and WinterJS comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Wasmtime
Fast, secure, and configurable WebAssembly runtime for diverse environments.
Best for you if:
- • Executes WebAssembly modules quickly and securely.
- • Built with an optimizing code generator for high performance.
WinterJS
Blazing-fast JavaScript server for Service Workers, built for high performance.
Best for you if:
- • A blazing-fast JavaScript server running WinterCG-compliant Service Workers.
- • Achieves high performance, handling up to 100,000 requests/second.
| At a Glance |  Wasmtime |  WinterJS |
|---|---|---|
Price | Free | Free |
Best For | Hosting & Deployment | Hosting & Deployment |
Rating | —/100 | —/100 |
| Feature | Wasmtime | WinterJS |
|---|---|---|
| Pricing Model | Free | Free |
| Editorial Score | — | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Hosting & DeploymentServerless | Hosting & DeploymentServerless |
How Wasmtime and WinterJS Compare
Wasmtime
Fast, secure, and configurable WebAssembly runtime for diverse environments.
Free
WinterJS
Blazing-fast JavaScript server for Service Workers, built for high performance.
Free
Who Should Use What?
On a budget?
Both are free. Compare plans on their websites.
Go with: Wasmtime
Want the highest-rated option?
Neither has been rated yet.
Go with: Wasmtime
Value user reviews?
Neither has user reviews yet.
Go with: Wasmtime
3 Questions to Help You Decide
What's your budget?
Both are free. Pricing won't help you decide here.
What's your use case?
Both are hosting & deployment tools. Compare their specific features to decide.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
Wasmtime
- Completely free
- Our pick for this comparison
WinterJS
The Bottom Line
Wasmtime is our pick.
Frequently Asked Questions
Is Wasmtime or WinterJS better?
Wasmtime scores high/100 in our evaluation. Both are free.
What are Wasmtime and WinterJS used for?
Wasmtime: Fast, secure, and configurable WebAssembly runtime for diverse environments.. WinterJS: Blazing-fast JavaScript server for Service Workers, built for high performance..
What does Wasmtime cost vs WinterJS?
Wasmtime is completely free. WinterJS is completely free. Visit their websites for detailed pricing.