Watt

Node.js application server.

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Console’s review

· Reviewed by David Mytton

What we like

Uses SO_REUSEPORT built into the Linux kernel for connection distribution, eliminating significant overhead. Handles crash restarts, graceful shutdown, monitoring, deployments for multiple applications. Shared HTTP cache across workers. Allows integration of databases, APIs, and multiple frameworks within a single app server.

Tradeoffs

Supports observability through Prometheus and Jaeger, but needs extra work to get data into services like DataDog unless you ingest through OTLP.

Is Watt a fit?

Based on Console’s review published on 2025-12-11. Summary updated .

Who it’s for

Developers of Node.js applications should consider Watt

Why consider it

Watt eliminates significant overhead for connection distribution

Keep in mind

Watt requires extra work to integrate with some observability services

Console is a free weekly newsletter with short reviews of developer tools, covering strengths and tradeoffs. This review reflects Console’s assessment at publication on 2025-12-11. Features and limitations may have changed since the review date. Read our selection criteria and learn about Console.

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