Edge.js

Run .NET and Node.js code in the same process across multiple platforms.

EstablishedOpen SourceLow lock-in
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Pricing

Free tier

Flat rate

Adoption

→Stable

License

Open Source

Data freshness

Aging · Jun 8, 2026

Overview

What is Edge.js?

Edge.js enables developers to run .NET and Node.js code within a single process, facilitating seamless integration between these two environments on Windows, macOS, and Linux. This tool is particularly useful for projects requiring both JavaScript and .NET capabilities.

Key differentiator

“Edge.js stands out by offering a unique solution for integrating .NET and Node.js within a single process, making it ideal for developers who need to leverage both ecosystems without the complexity of separate processes.”

Capability profile

Capability Radar

Ease of StartEcosystemValueMaturityFlexibilityScale Ready

Honest assessment

Strengths & Weaknesses

↑ Strengths

Seamless integration of .NET and Node.js in a single process.medium

Cross-platform support for Windows, macOS, and Linux.medium

Facilitates the use of .NET libraries within Node.js applications.medium

↓ Weaknesses

Complex setup and configurationhigh

Setting up Edge.js requires careful management of both Node.js and .NET environments, which can be error-prone for developers unfamiliar with both ecosystems.

Performance overhead due to interopmedium

The interaction between Node.js and .NET within a single process introduces additional overhead that may impact the performance of applications, especially under heavy load.

Limited community support and documentationhigh

Edge.js has a relatively small user base which can lead to limited third-party resources and slower resolution of issues through community channels.

Fit analysis

Who is it for?

✓ Best for

Developers working on projects that require the use of both .NET and JavaScript environments within a single application.

Teams looking to integrate legacy .NET code with modern web applications built using Node.js.

Hybrid application developers who need to leverage specific functionalities from both .NET and Node.js.

✕ Not a fit for

Projects that require real-time streaming capabilities as Edge.js focuses on process integration rather than real-time data processing.

Applications where the overhead of running two environments in a single process is not acceptable due to performance constraints.

Cost structure

Pricing

Free Tier

Available

Open source — free to use

Starts at

$0

Model

Flat rate

Enterprise

None

Performance benchmarks

How Fast Is It?

Ecosystem

Relationships

Alternatives

IronPython

Works well with

AngularReact

Next step

Get Started with Edge.js

Step-by-step setup guide with code examples and common gotchas.

View Setup Guide →