Fastify vs Spring Boot: Key Differences & When to Use Each

Comprehensive side-by-side comparison of features, pricing, and metrics

Key Differences

Compare Fastify and Spring Boot across features, pricing, integrations, and community metrics. Fastify / Spring Boot.

Feature

Fastify

Web Framework

Spring Boot

Web Framework

Side-by-side comparison of developer tools
Fast and low overhead web framework for Node.js
Java-based framework for building web applications
GitHub Stars
⭐ 37,058
⭐ 81,378
Contributors
👥 920
👥 1,609
Pricing
✓ Free
Enterprise: Contact sales
✓ Free
Enterprise: Contact sales
Languages
JavaScript
Java
Features
  • • Fastify
  • • Fastify Core
  • • Hacktoberfest
  • • Nodejs
  • • Performance
  • • Framework
  • • Java
  • • Spring
  • • Spring Boot
Integrations
No integrations listed
No integrations listed
Momentum Score
42/100 (slowing)
71/100 (stable)
Community Health
62/100 (moderate)
85/100 (excellent)
Maturity Index
59/100 (growing)
87/100 (mature)
Innovation Score
64/100 (progressive)
75/100 (innovative)
Risk Score (higher is safer)
67/100 (low)
81/100 (minimal)
Developer Experience
68/100 (fair)
53/100 (needs-improvement)
Links
🌐 Visit Website View on GitHub
🌐 Visit Website View on GitHub

Fastify Strengths

  • ✓ More features (5 listed)

Spring Boot Strengths

  • ✓ More popular (81,378 stars)
  • ✓ Larger community (1,609 contributors)

When to Use Fastify vs Spring Boot

Use Fastify when its strengths align better with your stack and team needs, and choose Spring Boot when its ecosystem, integrations, or cost profile is a better fit.

Related comparisons

Fastify vs Django → Spring Boot vs Django → Fastify vs Laravel → Spring Boot vs Laravel → Fastify vs Flask → Spring Boot vs Flask → Fastify vs Express.js → Spring Boot vs Express.js → Fastify vs Ruby on Rails → Spring Boot vs Ruby on Rails → Fastify vs Phoenix → Spring Boot vs Phoenix →

More Comparisons

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Data source: GitHub API

Last updated: 8/30/2026