Run WebAssembly everywhere, across platforms and languages
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205 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
WebAssembly runtime engine
Biggest con
WebAssembly expertise needed
TL;DR - Wasmer
- Wasmer is a WebAssembly runtime for running Wasm applications
- It executes WebAssembly outside the browser with near-native speed
- Free and open-source, Edge plans available
Pricing: Free plan available
Best for: Growing teams
4.0/5 across review platforms
What is Wasmer?
Wasmer runs WebAssembly everywhere. Universal runtime for WASM-portability across platforms and languages.
The portability is real. The performance is good. The ecosystem is growing.
Developers building portable applications explore Wasmer for WebAssembly runtime.
Available on: Web, iOS
Pros & Cons
Pros
- WebAssembly runtime engine
- Run WASM anywhere
- Multiple language support
- Fast execution performance
- Edge computing ready
Cons
- WebAssembly expertise needed
- Ecosystem still growing
- Debugging complexity
- Not all use cases suited
- Competition from other runtimes
Ratings Across the Web
4(205 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
WebAssembly runtimeMulti-platformFast executionPackage registryEdge runtimeOpen source
Pricing Plans
Pricing checked Jun 24, 2026
Free
Free
- 100,000 requests/month
- 150GB bandwidth
- 1GB storage
- Community support
Pay When Active
Usage-based
- Pay only when app receives traffic
- $0.10/GB bandwidth
- $0.023/GB-hour storage
- Automatic scaling
Reviews
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4.0/5
Across 205 verified user reviews on Capterra, SourceForge
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Wasmer FAQ
How does Wasmer enable portable application development?
Wasmer functions as a universal runtime for WebAssembly, allowing developers to run WebAssembly modules across various platforms and languages. This capability ensures that applications built with Wasmer can maintain portability wherever WebAssembly is supported.
What kind of user benefits most from Wasmer?
Developers who are building portable applications and require a robust WebAssembly runtime will find Wasmer most beneficial. It is particularly well-suited for those looking to deploy applications across different environments with consistent performance.
How does Wasmer compare to Wasmtime?
Wasmer, like Wasmtime, serves as a WebAssembly runtime engine, focusing on running WASM everywhere with good performance. Wasmer distinguishes itself with its emphasis on universal portability across platforms and its growing ecosystem for diverse language support.
What are the main limitations to consider when adopting Wasmer?
Adopting Wasmer requires existing WebAssembly expertise, and users should be aware that its ecosystem is still growing. Additionally, debugging WebAssembly applications can present complexities, and Wasmer may not be ideal for all possible use cases.
Can Wasmer be used for edge computing applications?
Yes, Wasmer is designed to be ready for edge computing, leveraging its fast execution performance and ability to run WebAssembly anywhere. This makes it suitable for deploying applications in distributed environments closer to data sources.
How is Wasmer priced?
Wasmer is available on a free tier, allowing users to get started without initial cost. For those requiring more extensive usage or additional features, paid plans are offered to accommodate their needs.
Source: wasmer.io