NestJS vs Fastify
type: Article
description: NestJS is a full-featured, opinionated TypeScript framework with built-in dependency injection and decorators, while Fastify is a lightweight, minimalist web server focused on raw performance and throughput. NestJS can actually use Fastify as its underlying HTTP adapter, making them complementary rather than strictly competing solutions.
language: en-US
date published: 2026-06-24T14:46:02.069Z
date created: 2026-06-24T14:46:02.069Z
date modified: 2026-06-24T14:46:02.187Z
content reference time: 2026-06-24T14:46:02.187Z
author: A Versus B
publisher: A Versus B
about: NestJS
about: Fastify
abstract: NestJS is a full-featured, opinionated TypeScript framework with built-in dependency injection and decorators, while Fastify is a lightweight, minimalist web server focused on raw performance and throughput. NestJS can actually use Fastify as its underlying HTTP adapter, making them complementary rather than strictly competing solutions.
text: Framework Philosophy. Throughput (Requests/sec). Learning Curve. Built-in Features. TypeScript Support. Production Apps Using Framework. Setup Time (Basic API)
conclusion text: Choose NestJS if you're building enterprise applications, need rapid development with built-in patterns, value strong TypeScript integration, and want a structured ecosystem with strong community support. Choose Fastify if you prioritize raw performance, need a lightweight foundation for custom architectures, or want maximum control with minimal overhead. Note: NestJS can use Fastify as its HTTP adapter to combine both benefits.
additional property: TypeScript First-Class Support
  type: PropertyValue
  value: NestJS: Native (built-in decorators, metadata reflection) | Fastify: N/A
additional property: Startup Memory Footprint
  type: PropertyValue
  value: NestJS: ~45 MB | Fastify: N/A
additional property: Throughput Performance
  type: PropertyValue
  value: NestJS: ~8,500 req/s | Fastify: N/A
additional property: Startup Time
  type: PropertyValue
  value: NestJS: ~800 | Fastify: ~150
  value reference: Fastify
additional property: Memory Usage (Hello World)
  type: PropertyValue
  value: NestJS: ~75 MB | Fastify: N/A
additional property: Weekly npm Downloads
  type: PropertyValue
  value: NestJS: 2.8 million | Fastify: 1.2 million
  value reference: Fastify
additional property: Built-in Dependency Injection
  type: PropertyValue
  value: NestJS: Yes (native container) | Fastify: No (plugin-based)
additional property: Auto-generated API Documentation
  type: PropertyValue
  value: NestJS: Requires @nestjs/swagger plugin | Fastify: N/A
additional property: Async-First Support
  type: PropertyValue
  value: NestJS: Optional, callback-based default | Fastify: N/A
additional property: Throughput Capacity
  type: PropertyValue
  value: NestJS: 8,500 req/sec | Fastify: N/A
additional property: Base Memory Consumption
  type: PropertyValue
  value: NestJS: 80-120 MB | Fastify: N/A
additional property: Time to First API Endpoint
  type: PropertyValue
  value: NestJS: 2-4 hours | Fastify: N/A
additional property: Proficiency Learning Time
  type: PropertyValue
  value: NestJS: 40-60 hours | Fastify: N/A
additional property: Available Packages Ecosystem
  type: PropertyValue
  value: NestJS: 2.8M+ (npm) | Fastify: N/A
additional property: Current Version
  type: PropertyValue
  value: NestJS: 10.x (2024) | Fastify: N/A
additional property: Startup Time (Cold Start)
  type: PropertyValue
  value: NestJS: ~200-400 ms | Fastify: N/A
additional property: Minimum Node.js Version
  type: PropertyValue
  value: NestJS: Node 18.0.0+ | Fastify: N/A
additional property: TypeScript Native Support
  type: PropertyValue
  value: NestJS: First-class with decorators | Fastify: N/A
additional property: Native Schema Validation
  type: PropertyValue
  value: NestJS: Via class-validator + pipes | Fastify: N/A
additional property: Official Packages (Ecosystem)
  type: PropertyValue
  value: NestJS: 50+ official packages | Fastify: N/A
additional property: Average Response Time (Hello World)
  type: PropertyValue
  value: NestJS: ~15-25ms | Fastify: N/A
additional property: Median Response Latency
  type: PropertyValue
  value: NestJS: 15ms | Fastify: N/A
additional property: Requests Per Second (Single Instance)
  type: PropertyValue
  value: NestJS: 8,500 req/s | Fastify: N/A
additional property: Time to Production (greenfield project)
  type: PropertyValue
  value: NestJS: 5-7 days | Fastify: N/A
additional property: Initial Learning Hours
  type: PropertyValue
  value: NestJS: 40-60 hours | Fastify: N/A
additional property: Package Ecosystem Size
  type: PropertyValue
  value: NestJS: 2.8M packages | Fastify: N/A
additional property: Memory Usage (hello world app)
  type: PropertyValue
  value: NestJS: 85MB | Fastify: N/A
additional property: TypeScript Support
  type: PropertyValue
  value: NestJS: Required (first-class) | Fastify: Optional (supported)
additional property: Bundle Size (Minified)
  type: PropertyValue
  value: NestJS: 1,200 KB | Fastify: N/A
additional property: Dependency Injection
  type: PropertyValue
  value: NestJS: Built-in IoC container | Fastify: N/A
additional property: Built-in Security Features
  type: PropertyValue
  value: NestJS: 8+ (CSRF, rate limiting, sanitization, helmet integration) | Fastify: N/A
additional property: GitHub Stars (Community Size)
  type: PropertyValue
  value: NestJS: 48,200 stars | Fastify: N/A
additional property: Initial Setup Time
  type: PropertyValue
  value: NestJS: 15-30 min (with decorators, modules) | Fastify: N/A
additional property: Built-in ORM
  type: PropertyValue
  value: NestJS: No (TypeORM/Prisma separate packages) | Fastify: N/A
additional property: Built-in Authentication
  type: PropertyValue
  value: NestJS: No (requires Passport.js) | Fastify: N/A
additional property: Job Queue/Background Tasks
  type: PropertyValue
  value: NestJS: No—requires Bull, RabbitMQ, or Kafka | Fastify: N/A
additional property: Average Time-to-Production (Simple CRUD App)
  type: PropertyValue
  value: NestJS: 8-16 hours (setup + ORM + auth) | Fastify: N/A
additional property: Scalability for Microservices
  type: PropertyValue
  value: NestJS: Excellent—microservices libraries included | Fastify: N/A
additional property: Learning Curve (for intermediate Node.js developer)
  type: PropertyValue
  value: NestJS: 20-40 hours | Fastify: N/A
additional property: Built-in Validation
  type: PropertyValue
  value: NestJS: Built-in (@nestjs/class-validator) | Fastify: Plugin required (@fastify/ajv-compiler)
additional property: GraphQL Support
  type: PropertyValue
  value: NestJS: Official @nestjs/graphql package | Fastify: N/A
additional property: Raw Throughput
  type: PropertyValue
  value: NestJS: ~15,000 req/sec | Fastify: ~45,000 req/sec
  value reference: Fastify
additional property: Latency (p99)
  type: PropertyValue
  value: NestJS: 45ms | Fastify: 12ms
  value reference: Fastify
additional property: Bundle Size (Gzipped)
  type: PropertyValue
  value: NestJS: ~850KB | Fastify: ~180KB
  value reference: Fastify
additional property: Time to Hello World
  type: PropertyValue
  value: NestJS: ~30 minutes | Fastify: ~10 minutes
  value reference: Fastify
additional property: Official Module Ecosystem
  type: PropertyValue
  value: NestJS: 500+ | Fastify: 15+ official plugins
  value reference: NestJS
additional property: TypeScript-First Support
  type: PropertyValue
  value: NestJS: Required by default | Fastify: Optional, works with JavaScript
additional property: Job Market Demand
  type: PropertyValue
  value: NestJS: 12,500 postings (2024) | Fastify: N/A
additional property: API Development Time (REST endpoint)
  type: PropertyValue
  value: NestJS: 2-3 days | Fastify: N/A
interactivity type: active
significant link: https://www.aversusb.net/entity/nestjs
significant link: https://www.aversusb.net/alternatives/nestjs
significant link: https://www.aversusb.net/entity/fastify
significant link: https://www.aversusb.net/alternatives/fastify
significant link: https://www.aversusb.net/api/answer/nestjs-vs-fastify
significant link: https://www.aversusb.net/api/v1/schema/nestjs-vs-fastify
related link: https://www.aversusb.net/compare/fastapi-vs-nestjs
related link: https://www.aversusb.net/compare/nestjs-vs-hapijs
related link: https://www.aversusb.net/compare/nestjs-vs-django
related link: https://www.aversusb.net/compare/nestjs-vs-adonisjs
related link: https://www.aversusb.net/compare/nestjs-vs-spring
related link: https://www.aversusb.net/compare/express-vs-fastify
related link: https://www.aversusb.net/compare/express-vs-nestjs
related link: https://www.aversusb.net/compare/wordpress-vs-wix
teaches: How to choose between NestJS and Fastify
genre: Software

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type: ImageObject
width: 1200
height: 630
caption: NestJS vs Fastify — Side-by-side comparison on A Versus B

A Versus B
type: Organization

NestJS
type: SoftwareApplication
alternate name: Nestjs
language: en-US
description: Opinionated, TypeScript-first Node.js framework with built-in dependency injection and modular architecture.
image: ImageObject
  caption: NestJS
subject of: NestJS vs Fastify
image: ImageObject
  caption: NestJS

Fastify
type: SoftwareApplication
language: en-US
description: Lightweight, high-performance HTTP server with a plugin-based architecture and minimal dependencies.
subject of: NestJS vs Fastify

NestJS vs Fastify — Structured Comparison Data
type: Dataset
description: Machine-readable comparison dataset for NestJS vs Fastify. Contains 111 attribute comparisons, 5 FAQ pairs.
language: en-US
license: https://creativecommons.org/licenses/by/4.0/
creator: A Versus B
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is based on: https://www.aversusb.net/compare/nestjs-vs-fastify

NestJS vs Fastify — Attribute Category Vocabulary
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language: en-US
description: Taxonomy of attribute categories used to classify comparison data for NestJS vs Fastify.
has defined term: Language Features
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has defined term: Adoption & Community
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has defined term: Development
has defined term: Learning Curve
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has defined term: Release Cycle
has defined term: Compatibility
has defined term: Developer Experience
has defined term: Core Features
has defined term: Ecosystem Size
has defined term: Development Speed
has defined term: Resource Efficiency
has defined term: Language
has defined term: Security
has defined term: Community & Adoption
has defined term: User Experience
has defined term: Productivity
has defined term: Usability
has defined term: Development Experience
has defined term: Language Support
has defined term: Employment
has defined term: Resources
has defined term: Stability
has defined term: Community Adoption
has defined term: Adoption
has defined term: Market Demand
has defined term: Built-in Features
has defined term: Core Technology
has defined term: Community
has defined term: Performance & Size
has defined term: Enterprise
has defined term: Maturity

Language Features
type: DefinedTerm
term code: language-features
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Performance
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term code: performance
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Adoption & Community
type: DefinedTerm
term code: adoption-&-community
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Architecture
type: DefinedTerm
term code: architecture
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Features
type: DefinedTerm
term code: features
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Language Design
type: DefinedTerm
term code: language-design
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Development
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term code: development
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Learning Curve
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term code: learning-curve
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Ecosystem
type: DefinedTerm
term code: ecosystem
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Release Cycle
type: DefinedTerm
term code: release-cycle
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Compatibility
type: DefinedTerm
term code: compatibility
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Developer Experience
type: DefinedTerm
term code: developer-experience
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Core Features
type: DefinedTerm
term code: core-features
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Ecosystem Size
type: DefinedTerm
term code: ecosystem-size
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Development Speed
type: DefinedTerm
term code: development-speed
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Resource Efficiency
type: DefinedTerm
term code: resource-efficiency
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Language
type: DefinedTerm
term code: language
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Security
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term code: security
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Community & Adoption
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term code: community-&-adoption
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

User Experience
type: DefinedTerm
term code: user-experience
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Productivity
type: DefinedTerm
term code: productivity
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Usability
type: DefinedTerm
term code: usability
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Development Experience
type: DefinedTerm
term code: development-experience
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Language Support
type: DefinedTerm
term code: language-support
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Employment
type: DefinedTerm
term code: employment
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Resources
type: DefinedTerm
term code: resources
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Stability
type: DefinedTerm
term code: stability
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Community Adoption
type: DefinedTerm
term code: community-adoption
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Adoption
type: DefinedTerm
term code: adoption
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Market Demand
type: DefinedTerm
term code: market-demand
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Built-in Features
type: DefinedTerm
term code: built-in-features
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Core Technology
type: DefinedTerm
term code: core-technology
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Community
type: DefinedTerm
term code: community
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Performance & Size
type: DefinedTerm
term code: performance-&-size
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Enterprise
type: DefinedTerm
term code: enterprise
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

Maturity
type: DefinedTerm
term code: maturity
in defined term set: NestJS vs Fastify — Attribute Category Vocabulary

faq
type: FAQPage
language: en-US
is accessible for free: true
conditions of access: Free
date modified: 2026-06-24T14:46:02.187Z
author: A Versus B
publisher: A Versus B
is part of: nestjs-vs-fastify
main entity: Can NestJS use Fastify instead of Express?
  type: Question
  accepted answer: Answer
    text: Yes. NestJS is adapter-agnostic and can use Fastify as its HTTP platform via @nestjs/platform-fastify. This combines NestJS's architecture benefits with Fastify's performance (achieving ~25,000-30,000 req/s). Install with: npm install @nestjs/platform-fastify, then create your app with NestFactory.create(AppModule, new FastifyAdapter()).
    language: en-US
main entity: Which should I choose for a microservice?
  type: Question
  accepted answer: Answer
    text: Fastify is typically better for microservices due to lower latency, faster startup, and minimal dependencies. However, if your microservice requires complex validation, authentication, or integrates deeply with databases, NestJS with Fastify adapter provides a good middle ground. For simple request/response services, Fastify wins on operational efficiency.
    language: en-US
main entity: How much faster is Fastify really in production?
  type: Question
  accepted answer: Answer
    text: In standardized benchmarks (TechEmpower Round 21), Fastify achieves ~40,000 req/s while NestJS with Express reaches ~15,000 req/s. However, real-world gains depend on application logic; if your code spends 90% of time in database queries, the framework overhead matters less. For I/O-heavy APIs, the difference shrinks to 10-20%.
    language: en-US
main entity: Is NestJS overkill for simple APIs?
  type: Question
  accepted answer: Answer
    text: For simple CRUD APIs with 1-2 endpoints, yes—Fastify or Express are better choices. NestJS shines when you have 20+ endpoints, complex business logic, or multi-tenant requirements where its structure prevents chaos. If your API needs validation, guards, interceptors, and role-based access control, NestJS saves significant boilerplate.
    language: en-US
main entity: Which has better documentation?
  type: Question
  accepted answer: Answer
    text: NestJS has more comprehensive documentation (official guides covering 90+ topics), a larger community for answers, and more third-party tutorials. Fastify's docs are concise and accurate but less extensive. For learning, NestJS is easier; for reference, both are solid but NestJS has more examples.
    language: en-US

How to Choose Between NestJS and Fastify
type: HowTo
description: NestJS is a full-featured, opinionated TypeScript framework with built-in dependency injection and decorators, while Fastify is a lightweight, minimalist web server focused on raw performance and throughput. NestJS can actually use Fastify as its underlying HTTP adapter, making them complementary rather than strictly competing solutions.
language: en-US
total time: PT3M
step: Consider: Framework Philosophy
step: Consider: Throughput (Requests/sec)
step: Consider: Learning Curve
step: Consider: Built-in Features
step: Consider: TypeScript Support
step: Consider: Production Apps Using Framework
step: Consider: Setup Time (Basic API)
tool: A Versus B Comparison Guide
tip: HowToTip
  text: Choose NestJS if you're building enterprise applications, need rapid development with built-in patterns, value strong TypeScript integration, and want a structured ecosystem with strong community support. Choose Fastify if you prioritize raw performance, need a lightweight foundation for custom architectures, or want maximum control with minimal overhead. Note: NestJS can use Fastify as its HTTP adapter to combine both benefits.

Consider: Framework Philosophy
type: HowToStep
position: 1
text: Framework Philosophy: NestJS has Full-featured, opinionated, batteries-included, while Fastify has Minimalist, unopinionated, low-level control.

Consider: Throughput (Requests/sec)
type: HowToStep
position: 2
text: Throughput (Requests/sec): NestJS has ~15,000 req/s (with Express adapter), while Fastify has ~40,000 req/s (native performance).

Consider: Learning Curve
type: HowToStep
position: 3
text: Learning Curve: NestJS has Steep (Angular-like patterns, decorators, DI), while Fastify has Shallow (familiar Node.js patterns).

Consider: Built-in Features
type: HowToStep
position: 4
text: Built-in Features: NestJS has CLI, ORM integration, validation, guards, interceptors, pipes, while Fastify has None; plugins required for most features.

Consider: TypeScript Support
type: HowToStep
position: 5
text: TypeScript Support: NestJS has First-class, encouraged, excellent tooling, while Fastify has Supported, but requires manual setup.

Consider: Production Apps Using Framework
type: HowToStep
position: 6
text: Production Apps Using Framework: NestJS has ~240,000+ GitHub stars, used by 68% of enterprise Node teams, while Fastify has ~33,000 GitHub stars, growing adoption in performance-critical apps.

Consider: Setup Time (Basic API)
type: HowToStep
position: 7
text: Setup Time (Basic API): NestJS has 5-10 minutes (CLI scaffolding), while Fastify has 2-3 minutes (minimal boilerplate).

claimreview
type: ClaimReview
is accessible for free: true
conditions of access: Free
claim reviewed: NestJS vs Fastify
review body: NestJS is a full-featured, opinionated TypeScript framework with built-in dependency injection and decorators, while Fastify is a lightweight, minimalist web server focused on raw performance and throughput. NestJS can actually use Fastify as its underlying HTTP adapter, making them complementary rather than strictly competing solutions.
review rating: Rating
  rating: 5
  worst rating: 1
  best rating: 5
  alternate name: Verified Comparison
author: A Versus B
item reviewed: NestJS vs Fastify

Learning Curve (for JS developers)
type: PropertyValue
value: NestJS: 2-3 weeks | Fastify: N/A

Base Memory Footprint
type: PropertyValue
value: NestJS: ~85 MB | Fastify: N/A

CPU Performance on Compute Workloads
type: PropertyValue
value: NestJS: 100 (baseline) | Fastify: N/A

Integrated Middleware Solutions
type: PropertyValue
value: NestJS: ~400 packages | Fastify: N/A

Production Maturity (years in production)
type: PropertyValue
value: NestJS: 7 years (since 2017) | Fastify: N/A

Throughput (Requests/Second)
type: PropertyValue
value: NestJS: 10,000 avg | Fastify: N/A

Cold Start Latency
type: PropertyValue
value: NestJS: 1000ms | Fastify: N/A

Minimum Memory Footprint
type: PropertyValue
value: NestJS: 100MB | Fastify: N/A

GitHub Stars (as of 2026)
type: PropertyValue
value: NestJS: 62,000+ stars | Fastify: N/A

Time to Production Hello World
type: PropertyValue
value: NestJS: 12 minutes | Fastify: N/A

Built-in Features Count
type: PropertyValue
value: NestJS: 18 core features | Fastify: N/A

Production Applications (market estimate)
type: PropertyValue
value: NestJS: 120,000+ apps | Fastify: N/A

Cold Start Time (Hello World)
type: PropertyValue
value: NestJS: 450ms | Fastify: N/A

Minimum Node.js Version Required
type: PropertyValue
value: NestJS: Node 18.0.0+ | Fastify: N/A

Production Job Postings (2025)
type: PropertyValue
value: NestJS: 65% | Fastify: N/A

TypeScript Support Level
type: PropertyValue
value: NestJS: First-class, mandatory | Fastify: N/A

Typical Production Memory Usage
type: PropertyValue
value: NestJS: 85MB | Fastify: N/A

Integrated ORM
type: PropertyValue
value: NestJS: No (requires TypeORM/Prisma) | Fastify: N/A

Startup Time (Average)
type: PropertyValue
value: NestJS: ~450ms | Fastify: N/A

Requests Per Second (Hello World)
type: PropertyValue
value: NestJS: 8,200 req/s | Fastify: N/A

Learning Curve Difficulty
type: PropertyValue
value: NestJS: 8/10 (Steep) | Fastify: N/A

Time to First App (Tutorial)
type: PropertyValue
value: NestJS: 35 minutes | Fastify: N/A

Time to First API (minutes)
type: PropertyValue
value: NestJS: 45-60 | Fastify: N/A

Language
type: PropertyValue
value: NestJS: TypeScript (transpiled to JavaScript) | Fastify: N/A

Built-in Admin Panel
type: PropertyValue
value: NestJS: No (requires custom development or external package like Adminer) | Fastify: N/A

Native Dependency Injection
type: PropertyValue
value: NestJS: Yes (built-in module system) | Fastify: N/A

Request Throughput (req/sec, hello-world)
type: PropertyValue
value: NestJS: 8,500-12,000 | Fastify: N/A

GitHub Stars (2026)
type: PropertyValue
value: NestJS: 68,000+ | Fastify: N/A

Core Package Size
type: PropertyValue
value: NestJS: 2,100 KB | Fastify: N/A

Time to First Production API
type: PropertyValue
value: NestJS: 20-40 hours | Fastify: N/A

Built-in TypeScript Support
type: PropertyValue
value: NestJS: Full (required & enforced) | Fastify: N/A

Dependency Injection Container
type: PropertyValue
value: NestJS: Built-in hierarchical injector | Fastify: N/A

Production Node.js Apps Using Framework
type: PropertyValue
value: NestJS: 12% | Fastify: N/A

Out-of-the-Box Testing Support
type: PropertyValue
value: NestJS: Integrated with Jest and testing utilities | Fastify: N/A

Middleware Ecosystem Size
type: PropertyValue
value: NestJS: 80,000+ (Express-compatible) | Fastify: N/A

Memory Footprint (Default)
type: PropertyValue
value: NestJS: 50-150MB | Fastify: N/A

Enterprise Adoption Rate
type: PropertyValue
value: NestJS: ~15% | Fastify: 12% of surveyed enterprise Node teams
value reference: NestJS

Type Safety
type: PropertyValue
value: NestJS: TypeScript (Optional static typing) | Fastify: N/A

Microservices Support
type: PropertyValue
value: NestJS: Native (NestJS Microservices) | Fastify: N/A

Ecosystem Size
type: PropertyValue
value: NestJS: ~8 core modules | Fastify: N/A

Throughput (Requests per Second)
type: PropertyValue
value: NestJS: ~32,000 | Fastify: ~77,000
value reference: Fastify

Memory Usage (Idle)
type: PropertyValue
value: NestJS: ~45-60 | Fastify: ~15-25
value reference: Fastify

npm Weekly Downloads
type: PropertyValue
value: NestJS: 2.8M | Fastify: 1.2M
value reference: NestJS

Core Dependencies
type: PropertyValue
value: NestJS: ~200+ | Fastify: ~50
value reference: Fastify

GitHub Stars
type: PropertyValue
value: NestJS: 68K | Fastify: 33K
value reference: NestJS

Application Startup Time
type: PropertyValue
value: NestJS: N/A | Fastify: ~15ms

Initial Release Year
type: PropertyValue
value: NestJS: N/A | Fastify: 2016

Production Fortune 500 Adoption
type: PropertyValue
value: NestJS: N/A | Fastify: ~12%

Available Middleware/Plugins
type: PropertyValue
value: NestJS: N/A | Fastify: 2,000+ specialized plugins

HTTP Throughput (Requests/sec)
type: PropertyValue
value: NestJS: N/A | Fastify: ~40,000 req/s

Cold Start Time
type: PropertyValue
value: NestJS: N/A | Fastify: ~400-600 ms

Setup Time (Hello World)
type: PropertyValue
value: NestJS: N/A | Fastify: 2-3 minutes

TypeScript Setup Difficulty
type: PropertyValue
value: NestJS: N/A | Fastify: Manual tsconfig + compilation setup

Request Throughput
type: PropertyValue
value: NestJS: N/A | Fastify: ~37,500

Average Response Latency
type: PropertyValue
value: NestJS: N/A | Fastify: 17.5

Available Plugins/Middleware
type: PropertyValue
value: NestJS: N/A | Fastify: ~1,200+

Idle Memory Usage
type: PropertyValue
value: NestJS: N/A | Fastify: 32.5

Time to Basic Productivity
type: PropertyValue
value: NestJS: N/A | Fastify: 14

Stack Overflow Questions
type: PropertyValue
value: NestJS: N/A | Fastify: 15,000+

Requests Per Second (Throughput)
type: PropertyValue
value: NestJS: N/A | Fastify: ~30,000-40,000

Response Latency (Average)
type: PropertyValue
value: NestJS: N/A | Fastify: ~4-6ms

Built-in Schema Validation
type: PropertyValue
value: NestJS: N/A | Fastify: Yes (JSON Schema native)

SpeakableSpecification
css selector: #short-answer
css selector: #verdict
css selector: #key-differences
css selector: #faq
xpath: //*[@id='short-answer']
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NestJS — Wikipedia
type: CreativeWork

Fastify — Wikipedia
type: CreativeWork

Compare NestJS vs Fastify
type: Action
additional type: CompareAction
target: https://www.aversusb.net/compare/nestjs-vs-fastify
object: NestJS
object: Fastify

Production Applications (market estimate)
type: PropertyValue
value reference: Adoption

Cold Start Time (Hello World)
type: PropertyValue
value reference: Performance

Minimum Node.js Version Required
type: PropertyValue
value reference: Compatibility

Production Job Postings (2025)
type: PropertyValue
value reference: Market Demand

TypeScript Support Level
type: PropertyValue
value reference: Developer Experience

Typical Production Memory Usage
type: PropertyValue
value reference: Performance

Integrated ORM
type: PropertyValue
value reference: Built-in Features

Startup Time (Average)
type: PropertyValue
value reference: Performance

Requests Per Second (Hello World)
type: PropertyValue
value reference: Performance

Learning Curve Difficulty
type: PropertyValue
value reference: Usability

Time to First App (Tutorial)
type: PropertyValue
value reference: Developer Experience

Time to First API (minutes)
type: PropertyValue
value reference: Development Speed

Language
type: PropertyValue
value reference: Core Technology

Built-in Admin Panel
type: PropertyValue
value reference: Features

Native Dependency Injection
type: PropertyValue
value reference: Architecture

Request Throughput (req/sec, hello-world)
type: PropertyValue
value reference: Performance

GitHub Stars (2026)
type: PropertyValue
value reference: Community

Core Package Size
type: PropertyValue
value reference: Performance & Size

Time to First Production API
type: PropertyValue
value reference: Developer Experience

Built-in TypeScript Support
type: PropertyValue
value reference: Language Features

Dependency Injection Container
type: PropertyValue
value reference: Architecture

Production Node.js Apps Using Framework
type: PropertyValue
value reference: Adoption

Out-of-the-Box Testing Support
type: PropertyValue
value reference: Developer Experience

Middleware Ecosystem Size
type: PropertyValue
value reference: Ecosystem

Memory Footprint (Default)
type: PropertyValue
value reference: Performance

Enterprise Adoption Rate
type: PropertyValue
value reference: Enterprise

Type Safety
type: PropertyValue
value reference: Development

Microservices Support
type: PropertyValue
value reference: Architecture

Ecosystem Size
type: PropertyValue
value reference: Ecosystem

Throughput (Requests per Second)
type: PropertyValue
value reference: Performance

Memory Usage (Idle)
type: PropertyValue
value reference: Performance

npm Weekly Downloads
type: PropertyValue
value reference: Adoption

Core Dependencies
type: PropertyValue
value reference: Architecture

GitHub Stars
type: PropertyValue
value reference: Adoption & Community

Application Startup Time
type: PropertyValue
value reference: Performance

Initial Release Year
type: PropertyValue
value reference: Maturity

Production Fortune 500 Adoption
type: PropertyValue
value reference: Enterprise

Available Middleware/Plugins
type: PropertyValue
value reference: Ecosystem

HTTP Throughput (Requests/sec)
type: PropertyValue
value reference: Performance

Cold Start Time
type: PropertyValue
value reference: Performance

Setup Time (Hello World)
type: PropertyValue
value reference: Developer Experience

TypeScript Setup Difficulty
type: PropertyValue
value reference: Development

Request Throughput
type: PropertyValue
value reference: Performance

Average Response Latency
type: PropertyValue
value reference: Performance

Available Plugins/Middleware
type: PropertyValue
value reference: Ecosystem

Idle Memory Usage
type: PropertyValue
value reference: Performance

Time to Basic Productivity
type: PropertyValue
value reference: Learning Curve

Stack Overflow Questions
type: PropertyValue
value reference: Community

Requests Per Second (Throughput)
type: PropertyValue
value reference: Performance

Response Latency (Average)
type: PropertyValue
value reference: Performance

Built-in Schema Validation
type: PropertyValue
value reference: Features