Comparison

Fastify vs Next.js

On the evidence we track, Next.js leads this comparison with a composite score of 82/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Fastify full profile →Next.js full profile →

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Fastify70

★Next.js82

Attribute comparison across 2 tools
Attribute	Fastify	Next.jsLeader
vioscaleAI score	70 / 100high · 78%	82 / 100high · 76%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	open_source
Price levelpricing.price_level	free	free
Transparentpricing.transparent	-	✓
Integrations
Countintegrations.count	28	4
Security
Scorecardsecurity.scorecard	8.3	6.2
Soc2security.soc2	-	✗
Vulnerabilitiessecurity.vulnerabilities	Count: 17 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=fastify&per_page=100 · Last 12m: 12 · Max severity: HIGH	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40next%2Fenv&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	16,712	304,007
Github starsadoption.github_stars	37,232	143,019
Package downloads weeklyadoption.package_downloads_weekly	-	67,469,854
Stackoverflow questionsadoption.stackoverflow_questions	-	148,000
Activity
Commits last 30dactivity.commits_last_30d	20	100
Release
Cadence daysrelease.cadence_days	4	9
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	JavaScript	JavaScript
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	6 items	8 items

Score

vioscaleAI score

Fastify70 / 100high · 78%

Next.js82 / 100high · 76%

Pricing

Free tier

Fastify✓

Next.js✓

Model

Fastifycommercial

Next.jsopen_source

Price level

Fastifyfree

Next.jsfree

Transparent

Fastify–

Next.js✓

Integrations

Count

Fastify28

Next.js4

Security

Scorecard

Fastify8.3

Next.js6.2

Soc2

Fastify–

Next.js✗

Vulnerabilities

FastifyCount: 17 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=fastify&per_page=100 · Last 12m: 12 · Max severity: HIGH

Next.jsCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40next%2Fenv&per_page=100 · Last 12m: 0

Reliability

Status page

Fastify–

Next.js✓

Adoption

Dependent repos

Fastify16,712

Next.js304,007

Github stars

Fastify37,232

Next.js143,019

Package downloads weekly

Fastify–

Next.js67,469,854

Stackoverflow questions

Fastify–

Next.js148,000

Activity

Commits last 30d

Fastify20

Next.js100

Release

Cadence days

Fastify4

Next.js9

History

Fastify20 items

Next.js20 items

License

Spdx

FastifyMIT

Next.jsMIT

Language

Primary

FastifyJavaScript

Next.jsJavaScript

Market

Availability

Fastify–

Next.jsAvailable worldwide

Content

Faq

Fastify6 items

Next.js8 items

Capabilities

Feature-by-feature on the axes that matter for web frameworks. “-” means undocumented, not absent.

Capability comparison for Web Frameworks
Capability	Fastify	Next.js
Core
Rendering model	-	Hybrid (SSR+SSG+CSR)
File-based routing	✓	✓
Language	JavaScript/TypeScript	JavaScript/TypeScript
Rendering
Server components	-	✓
Streaming SSR	-	✓
Fullstack
Built-in API / backend routes	✓	✓
DX
First-class TypeScript	✓	✓
Fast refresh / HMR	-	✓
Deployment
Edge runtime support	-	✓

Core

Rendering model

Fastify-

Next.jsHybrid (SSR+SSG+CSR)

File-based routing

Fastify✓

Next.js✓

Language

FastifyJavaScript/TypeScript

Next.jsJavaScript/TypeScript

Rendering

Server components

Fastify-

Next.js✓

Streaming SSR

Fastify-

Next.js✓

Fullstack

Built-in API / backend routes

Fastify✓

Next.js✓

First-class TypeScript

Fastify✓

Next.js✓

Fast refresh / HMR

Fastify-

Next.js✓

Deployment

Edge runtime support

Fastify-

Next.js✓

What each one is

The product in its own terms, so the numbers below have context.

Fastify

A Node.js web framework emphasizing fast request handling and low resource consumption while maintaining strong security, input validation, and developer experience.

Independently observed

Next.js

Leader

Next.js provides a complete framework for creating full-stack web applications by combining React components with built-in routing, rendering, data fetching, caching, and build tooling. It enables developers to write both frontend UI and backend API endpoints within a unified application structure.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Fastify

Open source

as of 2026-09-07verify ↗

Next.js

Leader

Open sourceFree tier

Open source (MIT license), free to use

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Fastify	Next.js
WebPlatforms	✓	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✓

Platforms

Web

Fastify✓

Next.js✓

CLI

Fastify✓

Next.js✓

Deployment

Cloud / SaaS

Fastify✓

Next.js✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Fastify

40 total

Next.js
Apollo Server
Angular
PostgreSQL
MongoDB
Redis
Elasticsearch
Swagger/OpenAPI
WebSocket
JWT
Helmet
Sentry
RabbitMQ
CORS
CSRF
OAuth2
Kubernetes
Firebase
Mongoose
TypeORM
OAuth
GraphQL
Swagger
OpenAPI
+16 more

Independently observed

Next.js

Leader

5 total

Cloudinary
Netlify
Cloudflare
Google Cloud
AWS Amplify

Independently observed

Still deciding?

Fastify or Next.js: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.