Watt, The Node.js Application Server

Watt (wattpm) is Platformatic's core Node.js application server, currently at version 3.52.2. It provides a robust runtime environment for centrally managing and orchestrating multiple Node.js applications, offering built-in support for popular frameworks like Fastify, Next.js, Astro, and Express. The project maintains a very active development cycle, with frequent patch and minor releases, often multiple times a week, ensuring quick bug fixes and feature enhancements. Key differentiators include an integrated virtual mesh network for inter-service communication, high-performance logging via Pino, comprehensive monitoring with Prometheus, and distributed tracing through OpenTelemetry. This makes it suitable for modular monoliths and microservices architectures where centralized management and observability are critical.