Hapi

Hapi is a Node.js web framework for building APIs and web applications — known for its rich plugin system, built-in input validation, authentication mechanisms, and strong security defaults that make it popular for building enterprise-grade backend services and APIs. Originally created at Walmart Labs by Eran Hammer in 2011 (to handle Walmart's Black Friday traffic loads), Hapi became an independent open-source project and remains actively maintained. The framework competes with Express.js (more popular but lower-level) and Fastify for Node.js server-side development.\n\nHapi's design philosophy emphasizes configuration over code — developers define routes, validation schemas, authentication requirements, and response formatting through configuration objects rather than writing middleware chains. This structured approach makes Hapi applications more predictable and testable than Express.js applications, but with more initial setup. Hapi's built-in validation (using Joi schema validation), authentication (multiple strategies via plugins), and caching (catbox abstraction) reduce the need for third-party middleware.\n\nIn 2025, Hapi competes primarily with Express.js (the dominant Node.js framework by volume), Fastify (performance-focused alternative), and NestJS (TypeScript-first framework with strong enterprise features) for Node.js web framework adoption. The Node.js ecosystem has matured significantly, and Hapi maintains a loyal developer community that values its structured approach and enterprise security defaults. The framework's active maintenance and ongoing development by the open-source community continues to make it a viable choice for teams prioritizing conventions and built-in features over Express's minimal approach.