{"slug":"express-vs-fastify)","title":"Express vs Fastify","url":"https://www.aversusb.net/compare/express-vs-fastify)","faqCount":5,"faqs":[{"question":"Which framework should I choose for a new project in 2026?","answer":"Choose Fastify if performance, modern defaults, and built-in validation matter for your use case (microservices, high-traffic APIs, serverless). Choose Express if you need maximum community resources, prefer a gentler learning curve, or building traditional web applications where performance isn't critical. Both are actively maintained and production-ready."},{"question":"How much faster is Fastify than Express?","answer":"Fastify handles 2-3x more requests per second (35,000 req/s vs 15,000 req/s) with 50% lower latency (5ms vs 10ms average). This translates to roughly 30-50% cost savings on hosting infrastructure at scale due to lower memory requirements (~28MB vs ~45MB idle)."},{"question":"Can I migrate an Express app to Fastify?","answer":"Partial migration is possible but not trivial. Express middleware and plugin systems differ from Fastify's. Small projects (< 10 routes) can be rewritten in 1-2 days. Large Express apps with heavy middleware dependency may require weeks. Consider Fastify for new projects rather than porting existing Express code."},{"question":"Why does Express have 6x more downloads than Fastify?","answer":"Express has 15+ years of market dominance, is the industry standard taught in most Node.js courses, and benefits from extensive legacy system usage. Fastify is newer (released 2016) but growing faster year-over-year. Express's larger ecosystem provides psychological comfort for enterprise teams, though Fastify is catching up rapidly for performance-sensitive workloads."},{"question":"Is Express dead or being replaced by Fastify?","answer":"No. Express remains actively maintained with 100M+ weekly downloads and is still the default choice for many projects. Express and Fastify serve different purposes: Express prioritizes simplicity and ecosystem; Fastify prioritizes performance. Both will coexist for years. Choose based on your project's performance requirements, not framework popularity."}],"faqPageSchema":{"@context":"https://schema.org","@type":"FAQPage","@id":"https://www.aversusb.net/compare/express-vs-fastify)#faq","url":"https://www.aversusb.net/compare/express-vs-fastify)","inLanguage":"en-US","name":"Express vs Fastify — FAQ","description":"Frequently asked questions about Express vs Fastify","dateModified":"2026-07-07T16:05:21.721Z","author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"},"publisher":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"},"isPartOf":{"@type":"Article","@id":"https://www.aversusb.net/compare/express-vs-fastify)#article"},"license":"https://creativecommons.org/licenses/by/4.0/","speakable":{"@type":"SpeakableSpecification","cssSelector":["#faq",".faq-item"]},"mainEntity":[{"@type":"Question","name":"Which framework should I choose for a new project in 2026?","acceptedAnswer":{"@type":"Answer","text":"Choose Fastify if performance, modern defaults, and built-in validation matter for your use case (microservices, high-traffic APIs, serverless). Choose Express if you need maximum community resources, prefer a gentler learning curve, or building traditional web applications where performance isn't critical. Both are actively maintained and production-ready.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/express-vs-fastify)"}},{"@type":"Question","name":"How much faster is Fastify than Express?","acceptedAnswer":{"@type":"Answer","text":"Fastify handles 2-3x more requests per second (35,000 req/s vs 15,000 req/s) with 50% lower latency (5ms vs 10ms average). This translates to roughly 30-50% cost savings on hosting infrastructure at scale due to lower memory requirements (~28MB vs ~45MB idle).","inLanguage":"en-US","url":"https://www.aversusb.net/compare/express-vs-fastify)"}},{"@type":"Question","name":"Can I migrate an Express app to Fastify?","acceptedAnswer":{"@type":"Answer","text":"Partial migration is possible but not trivial. Express middleware and plugin systems differ from Fastify's. Small projects (< 10 routes) can be rewritten in 1-2 days. Large Express apps with heavy middleware dependency may require weeks. Consider Fastify for new projects rather than porting existing Express code.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/express-vs-fastify)"}},{"@type":"Question","name":"Why does Express have 6x more downloads than Fastify?","acceptedAnswer":{"@type":"Answer","text":"Express has 15+ years of market dominance, is the industry standard taught in most Node.js courses, and benefits from extensive legacy system usage. Fastify is newer (released 2016) but growing faster year-over-year. Express's larger ecosystem provides psychological comfort for enterprise teams, though Fastify is catching up rapidly for performance-sensitive workloads.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/express-vs-fastify)"}},{"@type":"Question","name":"Is Express dead or being replaced by Fastify?","acceptedAnswer":{"@type":"Answer","text":"No. Express remains actively maintained with 100M+ weekly downloads and is still the default choice for many projects. Express and Fastify serve different purposes: Express prioritizes simplicity and ecosystem; Fastify prioritizes performance. Both will coexist for years. Choose based on your project's performance requirements, not framework popularity.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/express-vs-fastify)"}}]}}