express-rate-limit vs bottleneck vs limiter vs p-limit vs rate-limiter-flexible vs ratelimiter
Rate Limiting Libraries for Node.js
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Rate Limiting Libraries for Node.js

Rate limiting libraries are essential tools in web development that help control the amount of incoming requests to a server or service. They prevent abuse by limiting the number of requests a user can make in a given timeframe, thus protecting resources and ensuring fair usage. These libraries can be used to implement various strategies for rate limiting, such as fixed window, sliding window, token bucket, and leaky bucket algorithms, each suited for different use cases and performance requirements.

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express-rate-limit57,845,9633,284153 kB711 days agoMIT
bottleneck02,003-887 years agoMIT
limiter01,564158 kB152 years agoMIT
p-limit02,91314.9 kB0a month agoMIT
rate-limiter-flexible03,582230 kB92 months agoISC
ratelimiter0723-116 years agoMIT

Feature Comparison: express-rate-limit vs bottleneck vs limiter vs p-limit vs rate-limiter-flexible vs ratelimiter

Configuration Flexibility

  • express-rate-limit:

    express-rate-limit provides basic configuration options such as windowMs and max, but is less flexible compared to Bottleneck. It is designed for straightforward use cases where complex configurations are not necessary.

  • bottleneck:

    Bottleneck offers extensive configuration options, allowing developers to customize limits based on various criteria such as user ID, request type, or time intervals. This flexibility makes it suitable for applications with diverse rate limiting needs.

  • limiter:

    Limiter has minimal configuration options, focusing on simplicity and ease of use. It is suitable for projects that do not require advanced settings or custom behaviors.

  • p-limit:

    p-limit allows you to set the maximum number of concurrent promises, providing a straightforward way to manage asynchronous operations, but does not offer extensive configuration options beyond concurrency limits.

  • rate-limiter-flexible:

    rate-limiter-flexible provides a wide range of configuration options, including different rate limiting strategies and the ability to set limits based on various criteria. This makes it highly adaptable to different use cases.

  • ratelimiter:

    ratelimiter offers basic configuration options, making it easy to set up but lacking the advanced flexibility found in more complex libraries.

Integration with Frameworks

  • express-rate-limit:

    express-rate-limit is specifically designed for Express.js applications, providing seamless integration as middleware, which simplifies implementation for Express developers.

  • bottleneck:

    Bottleneck can be integrated into various frameworks and libraries, making it versatile for different types of applications beyond just web servers, including background jobs and API clients.

  • limiter:

    Limiter is framework-agnostic and can be used in any Node.js application, but it does not offer specific integrations with popular frameworks.

  • p-limit:

    p-limit is a standalone utility that can be used in any JavaScript environment, making it versatile for various applications, but it does not provide framework-specific features.

  • rate-limiter-flexible:

    rate-limiter-flexible can be integrated with various Node.js frameworks and supports multiple storage backends, making it suitable for complex applications that require flexibility in implementation.

  • ratelimiter:

    ratelimiter is a simple library that can be used in any Node.js application but does not provide specific integrations with frameworks.

Performance

  • express-rate-limit:

    express-rate-limit is efficient for basic rate limiting needs but may introduce some overhead in high-traffic applications due to its middleware nature.

  • bottleneck:

    Bottleneck is optimized for performance, allowing for efficient management of concurrent requests and minimizing the overhead associated with rate limiting. It is suitable for high-throughput applications.

  • limiter:

    Limiter is lightweight and performs well for simple rate limiting tasks, making it suitable for applications with low to moderate traffic.

  • p-limit:

    p-limit is designed to manage concurrency effectively, ensuring that performance remains optimal even when limiting the number of concurrent operations.

  • rate-limiter-flexible:

    rate-limiter-flexible is designed for high performance and can handle large volumes of requests efficiently, especially when using Redis or other optimized storage backends.

  • ratelimiter:

    ratelimiter is simple and performs adequately for basic rate limiting tasks, but may not be suitable for high-performance applications.

Use Cases

  • express-rate-limit:

    express-rate-limit is best suited for web applications that need to limit requests from users to prevent abuse, such as login attempts or API calls.

  • bottleneck:

    Bottleneck is ideal for applications that require complex rate limiting scenarios, such as API clients that need to respect rate limits imposed by third-party services while managing multiple requests concurrently.

  • limiter:

    Limiter is suitable for simple applications that require basic rate limiting without additional features, such as limiting requests to a single endpoint.

  • p-limit:

    p-limit is perfect for managing concurrent asynchronous operations, such as making multiple API calls or processing large datasets without overwhelming the server.

  • rate-limiter-flexible:

    rate-limiter-flexible is designed for applications with complex rate limiting needs, such as e-commerce platforms or social media applications that require dynamic rate limits based on user behavior.

  • ratelimiter:

    ratelimiter is suitable for applications that require basic rate limiting without the need for advanced features or configurations.

Learning Curve

  • express-rate-limit:

    express-rate-limit is easy to learn and implement, especially for developers familiar with Express.js, making it a great choice for beginners.

  • bottleneck:

    Bottleneck has a moderate learning curve due to its extensive features and configuration options, but it provides detailed documentation to assist developers.

  • limiter:

    Limiter is straightforward and easy to understand, making it suitable for developers who need quick implementation without complex configurations.

  • p-limit:

    p-limit has a simple API, making it easy to learn for developers familiar with promises and asynchronous programming in JavaScript.

  • rate-limiter-flexible:

    rate-limiter-flexible has a steeper learning curve due to its advanced features and configurations, but it offers comprehensive documentation to help users understand its capabilities.

  • ratelimiter:

    ratelimiter is simple to use, with a low learning curve, making it accessible for developers of all skill levels.

How to Choose: express-rate-limit vs bottleneck vs limiter vs p-limit vs rate-limiter-flexible vs ratelimiter

  • express-rate-limit:

    Select express-rate-limit if you are building an Express.js application and need a straightforward middleware solution for basic rate limiting. It is easy to set up and integrates seamlessly with Express, making it suitable for simple use cases.

  • bottleneck:

    Choose Bottleneck if you need a highly configurable and flexible rate limiter that allows for complex scheduling and prioritization of tasks. It is ideal for managing concurrent requests and can handle both rate limiting and queuing effectively.

  • limiter:

    Opt for Limiter if you require a lightweight solution that provides basic rate limiting features without additional dependencies. It is suitable for applications that need minimal setup and straightforward functionality.

  • p-limit:

    Use p-limit when you need to limit the number of concurrent promises in your application. This is particularly useful for managing asynchronous operations and ensuring that your application does not overwhelm resources with too many simultaneous requests.

  • rate-limiter-flexible:

    Choose rate-limiter-flexible if you need a powerful and flexible rate limiting solution that supports various storage backends (like Redis, MongoDB, etc.) and advanced features such as different rate limiting strategies and dynamic limits. It is ideal for applications with complex rate limiting requirements.

  • ratelimiter:

    Select ratelimiter for a simple and effective rate limiting solution that is easy to implement. It is suitable for applications that require basic rate limiting without the overhead of more complex libraries.

Similar Npm Packages to express-rate-limit

express-rate-limit is a middleware for Express.js that helps to limit repeated requests to public APIs and endpoints. It is particularly useful for preventing abuse and ensuring fair usage of resources by controlling the rate at which clients can make requests. By implementing rate limiting, developers can protect their applications from denial-of-service attacks and reduce the load on their servers.

While express-rate-limit is a popular choice for rate limiting in Express applications, there are several alternatives that offer different features and capabilities. Here are a few notable options:

  • express-brute is a robust rate-limiting middleware for Express.js that provides more advanced features compared to express-rate-limit. It allows you to define complex rate-limiting strategies, including support for different stores (like memory, Redis, etc.) and customizable error messages. If you need a more flexible and powerful solution for rate limiting that can handle various scenarios, express-brute is a great choice.

  • express-slow-down is another middleware for Express.js that focuses on slowing down responses instead of outright blocking requests. This can be particularly useful in situations where you want to deter abusive behavior without completely denying access. By introducing delays for repeated requests, express-slow-down can help mitigate the impact of abusive clients while still allowing them to access the service.

  • rate-limiter-flexible is a flexible and powerful rate-limiting library that can be used with various frameworks, including Express.js. It supports a wide range of features, such as different storage backends (Redis, MongoDB, etc.), dynamic limits based on user roles, and more. If you need a highly configurable rate-limiting solution that can adapt to different requirements, rate-limiter-flexible is an excellent option.

To explore how these packages compare, check out the following link: Comparing express-brute vs express-rate-limit vs express-slow-down vs rate-limiter-flexible.

Similar Npm Packages to bottleneck

bottleneck is a powerful rate-limiting library for JavaScript that helps manage the execution of asynchronous tasks. It allows developers to control how many tasks are executed concurrently and to set limits on the rate at which tasks can be processed. This can be particularly useful when dealing with APIs that have rate limits or when you want to prevent overwhelming a server with too many requests at once. Bottleneck provides a flexible and easy-to-use API for managing these constraints, making it a popular choice for developers looking to optimize their asynchronous workflows.

Here are some alternatives to bottleneck:

  • async is a utility module that provides powerful functions for working with asynchronous JavaScript. It offers a variety of methods for managing asynchronous control flow, including parallel execution, series execution, and more. While async does not specifically focus on rate limiting, it provides a robust set of tools for handling asynchronous operations, making it a versatile choice for many developers. If you need a comprehensive toolkit for managing asynchronous tasks beyond just rate limiting, async is a solid option.
  • p-limit is a simple and lightweight library that allows you to limit the number of concurrent promises. It provides a straightforward API for controlling the concurrency of asynchronous operations, making it easy to prevent overwhelming resources or APIs. If you are looking for a minimalistic solution specifically focused on limiting concurrency, p-limit is a great choice that integrates well with promise-based workflows.
  • promise-limit is another library designed to limit the number of concurrent promises. It offers a simple API for managing the execution of asynchronous functions, allowing you to specify how many promises can run simultaneously. If you need a straightforward way to control concurrency without the additional features of a more complex library, promise-limit can be an effective solution.
  • rate-limiter-flexible is a flexible and powerful rate-limiting library that can be used in both Node.js and browser environments. It allows you to implement various rate-limiting strategies, such as limiting requests per second, minute, or hour. This library is particularly useful for applications that require advanced rate-limiting capabilities, such as those interacting with APIs that enforce strict rate limits.

To see how bottleneck compares with async, p-limit, promise-limit, and rate-limiter-flexible, check out the comparison: Comparing async vs bottleneck vs p-limit vs promise-limit vs rate-limiter-flexible.

Similar Npm Packages to limiter

limiter is a rate-limiting middleware for Node.js applications. It helps developers control the rate at which requests are processed, preventing abuse and ensuring fair usage of resources. By implementing rate limiting, applications can protect themselves from denial-of-service attacks and manage traffic more effectively. While limiter provides a solid solution for rate limiting, there are other libraries that serve similar purposes. Here are a few alternatives:

  • express-rate-limit is a popular middleware for Express applications that allows you to limit repeated requests to public APIs and endpoints. It is highly configurable, enabling developers to set limits based on various criteria such as IP address, request path, and more. With built-in support for handling exceeded limits, express-rate-limit is an excellent choice for Express applications that require robust rate-limiting capabilities.
  • ratelimiter is another rate-limiting library that provides a simple and flexible API for implementing rate limits in Node.js applications. It allows developers to define limits based on different criteria and offers features such as burst control and dynamic rate limits. If you are looking for a lightweight and straightforward solution for rate limiting, ratelimiter is a great option.

To see how limiter compares with express-rate-limit and ratelimiter, check out the comparison: Comparing express-rate-limit vs limiter vs ratelimiter.

Similar Npm Packages to p-limit

p-limit is a utility library that allows developers to limit the number of concurrent promises that can be executed at a time. This is particularly useful when dealing with APIs or other asynchronous operations where you want to avoid overwhelming the server or hitting rate limits. By using p-limit, you can control the flow of asynchronous tasks, ensuring that only a specified number of them run concurrently, while the others wait in line until a slot becomes available.

While p-limit is a great tool for managing concurrency, there are other libraries that provide similar functionality. Here are a couple of alternatives:

  • p-queue is a promise queue that allows you to manage the concurrency of asynchronous tasks. It provides a more feature-rich solution than p-limit, with options for prioritizing tasks, setting a maximum concurrency level, and even handling retries. If you need more control over the order and execution of your asynchronous operations, p-queue is an excellent choice. It’s particularly useful for scenarios where you need to manage complex workflows or prioritize certain tasks over others.

  • p-throttle is another alternative that focuses on limiting the rate at which a function can be called. Unlike p-limit, which limits concurrent executions, p-throttle allows you to control how often a function can be invoked over time. This can be particularly useful for scenarios like API rate limiting, where you want to ensure that a function is not called too frequently. If your primary concern is controlling the rate of function execution rather than managing concurrency, p-throttle is the right tool for the job.

To see how p-limit compares with p-queue and p-throttle, check out the comparison: Comparing p-limit vs p-queue vs p-throttle.

Similar Npm Packages to rate-limiter-flexible

rate-limiter-flexible is a powerful and flexible rate-limiting library for Node.js applications. It allows developers to implement rate-limiting strategies to control the number of requests a user can make to an API or service within a specified time frame. This is particularly useful for protecting APIs from abuse, ensuring fair usage, and maintaining performance under high load. The library supports various storage backends, including in-memory, Redis, and MongoDB, making it adaptable to different application architectures.

While rate-limiter-flexible is a robust solution, there are several alternatives available in the Node.js ecosystem that also provide rate-limiting capabilities. Here are a few notable ones:

  • bottleneck is a powerful rate-limiting library that allows you to control the rate of function execution. It provides features such as concurrency control, priority queues, and scheduling, making it suitable for scenarios where you need to manage the execution of asynchronous tasks. If your application requires more than just simple request limiting and you need to manage the execution of functions or tasks, bottleneck is an excellent choice.

  • express-rate-limit is a middleware for Express applications that provides basic rate-limiting functionality. It is easy to set up and configure, making it a popular choice for developers using the Express framework. If you are looking for a straightforward solution to limit the number of requests to your Express routes, express-rate-limit is a simple and effective option.

  • limiter is another lightweight rate-limiting library for Node.js. It provides a simple API for limiting the rate of function calls and can be easily integrated into existing applications. If you need a minimalistic approach to rate limiting without the overhead of more complex libraries, limiter can be a suitable choice.

To compare these libraries and see how they stack up against each other, check out the comparison: Comparing bottleneck vs express-rate-limit vs limiter vs rate-limiter-flexible.

Similar Npm Packages to ratelimiter

ratelimiter is a rate-limiting library for Node.js applications that helps manage the number of requests a user can make to a server within a specified time frame. This is particularly useful for protecting APIs from abuse, ensuring fair usage, and preventing server overload. While ratelimiter provides a solid solution for rate limiting, there are several alternatives available in the Node.js ecosystem. Here are a few notable ones:

  • bottleneck is a powerful and flexible rate-limiting library for JavaScript. It allows developers to control the rate of function calls, making it suitable for scenarios like API requests, database queries, or any other asynchronous operations. Bottleneck supports features like priority queues, clustering, and multiple strategies for rate limiting, making it an excellent choice for applications that require fine-grained control over request rates and concurrency.

  • express-rate-limit is a middleware for Express.js applications that provides basic rate-limiting functionality. It is easy to set up and configure, allowing developers to limit repeated requests to public APIs and endpoints. This library is particularly useful for protecting against brute-force attacks and ensuring fair usage among users. If you are building an Express application and need a straightforward way to implement rate limiting, express-rate-limit is a great option.

  • limiter is a simple and lightweight rate-limiting library that can be used in Node.js applications. It provides a straightforward API for limiting the number of requests or operations that can be performed within a specified time frame. Limiter is ideal for developers looking for a minimalistic solution without the overhead of more complex libraries.

  • p-limit is a promise-based library that allows you to limit the number of concurrent asynchronous operations. While it is not a traditional rate limiter, it can be effectively used to control the concurrency of API requests or other asynchronous tasks. If your application needs to manage the number of simultaneous operations rather than just the rate of requests, p-limit is a suitable choice.

  • rate-limiter-flexible is a highly flexible rate-limiting library that supports various storage backends, including Redis, MongoDB, and in-memory storage. It offers advanced features like dynamic rate limiting, multiple strategies, and support for different types of limits (e.g., IP-based, user-based). This library is ideal for applications that require robust and customizable rate-limiting solutions.

To explore how ratelimiter compares with these alternatives, check out the comparison: Comparing bottleneck vs express-rate-limit vs limiter vs p-limit vs rate-limiter-flexible vs ratelimiter.

README for express-rate-limit

express-rate-limit

tests npm version npm downloads license

Basic rate-limiting middleware for Express. Use to limit repeated requests to public APIs and/or endpoints such as password reset. Plays nice with express-slow-down and ratelimit-header-parser.

Usage

The full documentation is available on-line.

import { rateLimit } from 'express-rate-limit'

const limiter = rateLimit({
	windowMs: 15 * 60 * 1000, // 15 minutes
	limit: 100, // Limit each IP to 100 requests per `window` (here, per 15 minutes).
	standardHeaders: 'draft-8', // draft-6: `RateLimit-*` headers; draft-7 & draft-8: combined `RateLimit` header
	legacyHeaders: false, // Disable the `X-RateLimit-*` headers.
	ipv6Subnet: 56, // Set to 60 or 64 to be less aggressive, or 52 or 48 to be more aggressive
	// store: ... , // Redis, Memcached, etc. See below.
})

// Apply the rate limiting middleware to all requests.
app.use(limiter)

Data Stores

The rate limiter comes with a built-in memory store, and supports a variety of external data stores.

Configuration

All function options may be async. Click the name for additional info and default values.

OptionTypeRemarks
windowMsnumberHow long to remember requests for, in milliseconds.
limitnumber | functionHow many requests to allow.
messagestring | json | functionResponse to return after limit is reached.
statusCodenumberHTTP status code after limit is reached (default is 429).
handlerfunctionFunction to run after limit is reached (overrides message and statusCode settings, if set).
legacyHeadersbooleanEnable the X-Rate-Limit header.
standardHeaders'draft-6' | 'draft-7' | 'draft-8'Enable the Ratelimit header.
identifierstring | functionName associated with the quota policy enforced by this rate limiter.
storeStoreUse a custom store to share hit counts across multiple nodes.
passOnStoreErrorbooleanAllow (true) or block (false, default) traffic if the store becomes unavailable.
keyGeneratorfunctionIdentify users (defaults to IP address).
ipv6Subnetnumber (32-64) | function | falseHow many bits of IPv6 addresses to use in default keyGenerator
requestPropertyNamestringAdd rate limit info to the req object.
skipfunctionReturn true to bypass the limiter for the given request.
skipSuccessfulRequestsbooleanUncount 1xx/2xx/3xx responses.
skipFailedRequestsbooleanUncount 4xx/5xx responses.
requestWasSuccessfulfunctionUsed by skipSuccessfulRequests and skipFailedRequests.
validateboolean | objectEnable or disable built-in validation checks.
loggerLoggerCustom logger

Thank You

Thanks to Mintlify for hosting the documentation at express-rate-limit.mintlify.app

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And thank you to everyone who's contributed to this project in any way! 🫶

Issues and Contributing

If you encounter a bug or want to see something added/changed, please go ahead and open an issue! If you need help with something, feel free to start a discussion!

If you wish to contribute to the library, thanks! First, please read the contributing guide. Then you can pick up any issue and fix/implement it!

License

MIT © Nathan Friedly, Vedant K

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