Express.js
The battle-tested standard. Middleware and controllers compatible with Express 4 and 5.
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Fastify
Fast and low overhead web framework, focused on providing the best developer experience.
Quick Comparison
| Feature | Express.js | Fastify |
|---|---|---|
| Type | Micro-framework | Micro-framework |
| Performance | Good | Very High |
| Type Safety | Standard TypeScript | Standard TypeScript |
| Ecosystem | Largest | Growing |
Feature Comparison by Category
Libraries
Express.js: 6 snippets | Fastify: 3 snippets
Middleware
Express.js: 11 snippets | Fastify: 8 snippets
Utilities
Express.js: 7 snippets | Fastify: 3 snippets
Documentation
Express.js: 3 snippets | Fastify: 1 snippets
Frequently Asked Questions
Which framework is faster, Express.js or Fastify?
Fastify generally has better raw performance benchmarks, but actual performance depends on your use case and workload.
Is Express.js compatible with Fastify middleware?
No, each framework has its own middleware system. However, many concepts translate between frameworks.
Which framework should I choose for my project?
Choose Express.js if you prioritize simplicity and ecosystem. Choose Fastify if you prioritize performance.
Can I migrate from Express.js to Fastify?
Migration is possible but requires significant effort due to different APIs and patterns. Consider using an abstraction layer if you anticipate needing to switch.