Fastify vs Phoenix: Key Differences & When to Use Each

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

Key Differences

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

Feature

Fastify

Web Framework

Phoenix

Web Framework

Side-by-side comparison of developer tools
Fast and low overhead web framework for Node.js
Productive web framework for Elixir
GitHub Stars
⭐ 36,169
⭐ 22,987
Contributors
👥 881
👥 1,465
Pricing
✓ Free
Enterprise: Contact sales
✓ Free
Enterprise: Contact sales
Languages
JavaScript
Elixir
Features
  • • Hacktoberfest
  • • Nodejs
  • • Performance
  • • Speed
  • • Webframework
  • • Api Server
  • • Distributed
  • • Elixir
  • • Realtime
  • • Web Framework
Integrations
No integrations listed
No integrations listed
Momentum Score
41/100 (stable)
51/100 (stable)
Community Health
63/100 (moderate)
57/100 (moderate)
Maturity Index
60/100 (growing)
63/100 (growing)
Innovation Score
59/100 (progressive)
59/100 (progressive)
Risk Score (higher is safer)
62/100 (low)
76/100 (minimal)
Developer Experience
68/100 (fair)
68/100 (fair)
Links
🌐 Visit Website View on GitHub
🌐 Visit Website View on GitHub

Fastify Strengths

  • ✓ More popular (36,169 stars)

Phoenix Strengths

  • ✓ Larger community (1,465 contributors)

When to Use Fastify vs Phoenix

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

Related comparisons

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

More Comparisons

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Data source: GitHub API

Last updated: 5/4/2026