Software Alternatives, Accelerators & Startups

Cypress.io VS Preact.js

Compare Cypress.io VS Preact.js and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Cypress.io logo Cypress.io

Slow, difficult and unreliable testing for anything that runs in a browser. Install Cypress in seconds and take the pain out of front-end testing.

Preact.js logo Preact.js

Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
  • Cypress.io Landing page
    Landing page //
    2023-04-17
  • Preact.js Landing page
    Landing page //
    2023-05-11

Cypress.io features and specs

  • Easy Setup and Configuration
    Cypress.io is known for its straightforward setup process, requiring minimal configuration to get started with writing and running tests, making it very accessible for developers new to end-to-end testing.
  • Real-time Reloads
    Cypress offers real-time reloading of tests, which improves the development experience by allowing instant feedback on test results as code changes are made.
  • Time Travel Debugging
    Cypress provides the ability to 'time travel' through tests by taking snapshots of the application state at different steps, making it easier to debug and understand failures.
  • Automatic Waiting
    Tests in Cypress automatically wait for commands and assertions, eliminating the need for manual waits and helping to avoid flaky tests due to timing issues.
  • Built-in Mocking and Stubbing
    Cypress has built-in capabilities for mocking and stubbing network requests, which simplifies testing of applications that depend on various services and APIs.
  • Rich Documentation and Community Support
    Cypress boasts comprehensive documentation and an active community, providing plenty of resources for learning and troubleshooting.
  • Cross Browser Testing
    Cypress supports testing in multiple browsers, including Chrome, Firefox, and Edge, ensuring compatibility across different environments.

Possible disadvantages of Cypress.io

  • Limited Browser Support
    Although Cypress supports several major browsers, it does not support legacy browsers like Internet Explorer, which can be a disadvantage for projects that require testing across a wider range of browsers.
  • No Native Mobile App Testing
    Cypress does not natively support mobile app testing, limiting its use for projects that need end-to-end testing on mobile platforms.
  • Heavy Memory Usage
    Cypress can consume significant system resources, particularly memory, which may impact performance during large or complex test runs.
  • Limited Parallelism
    By default, Cypress's parallel execution capabilities are limited, which can slow down the test suite execution for larger projects, although this can be mitigated with the Dashboard Service (a paid feature).
  • Learning Curve for Advanced Features
    While basic tests are easy to set up, leveraging advanced features like custom commands, plugins, and complex test setups can require a steeper learning curve.
  • Incompatibility with Some Testing Ecosystems
    Cypress's architecture and testing approach can sometimes cause compatibility issues with certain testing frameworks and libraries, particularly those that are tightly coupled with traditional WebDriver-based tools.

Preact.js features and specs

  • Size
    Preact is very small in size (about 3KB gzipped), which makes it easy to load and faster to execute, resulting in improved performance and quicker load times.
  • Compatibility
    Preact is largely compatible with React, allowing developers to switch to Preact with minimal code changes. This makes it easier to adopt for projects already using React.
  • Performance
    Due to its small size and efficient design, Preact offers excellent performance, especially on low-powered devices and in applications with heavy user interactions.
  • Ecosystem
    Preact can work with many tools and libraries that are designed for React, giving developers access to a rich ecosystem of resources.
  • Community
    Preact has an active and growing community that provides support, plugins, and third-party tools, making it easier for developers to find solutions and share knowledge.

Possible disadvantages of Preact.js

  • Feature Set
    While Preact covers most of the core React features, it lacks some of the advanced functionality present in React, which may require additional workarounds or third-party libraries.
  • Learning Curve
    For developers coming from a non-React background, learning Preact might involve a learning curve, particularly because of its similarities and subtle differences with React.
  • Tooling Compatibility
    Although many tools designed for React can work with Preact, some might not be directly compatible, requiring additional configuration or patches.
  • Community Size
    While Preact has a supportive community, it is smaller compared to the massive React community, which can result in fewer available resources and third-party packages.
  • Maturity
    Preact, being newer and less widely adopted than React, might not have the same level of battle-tested reliability for all use cases, especially for large scale applications.

Analysis of Cypress.io

Overall verdict

  • Cypress.io is considered a good testing tool for developers due to its efficiency, ease of use, and robust testing capabilities. Its growing community and continuous updates make it a worthwhile choice for web testing.

Why this product is good

  • Cypress.io is a powerful end-to-end testing framework for web applications. It offers a user-friendly interface, excellent documentation, and provides fast and reliable testing with real-time reloads and debugging. It also integrates well with CI/CD pipelines and supports modern JavaScript frameworks like React, Angular, and Vue.js.

Recommended for

  • Frontend developers who need to test web applications.
  • Teams looking for a reliable end-to-end testing solution.
  • Projects using modern JavaScript frameworks like React, Angular, or Vue.js.
  • Developers who require a tool with extensive documentation and community support.

Analysis of Preact.js

Overall verdict

  • Preact.js is a strong option for projects where performance and load time are critical, or where a light footprint is necessary. Its compatibility with React makes it a flexible and efficient alternative in scenarios where React may be overkill due to its larger size.

Why this product is good

  • Preact.js is known for its small size and high performance, making it an excellent choice for developers who need a lightweight alternative to React without sacrificing functionality. It offers a familiar API for React developers, ensuring an easy transition, and is highly efficient in terms of rendering performance. Preact also offers excellent compatibility with existing React tools and ecosystems, meaning many React packages work seamlessly with Preact.

Recommended for

    Preact.js is recommended for developers building applications with stringent performance requirements, those needing to optimize for fast loading times in environments with limited bandwidth or resources, or those looking to integrate React-like architecture in smaller projects without introducing the full weight of the React library.

Cypress.io videos

Introduction to automation testing with Cypress.io (Non-selenium framework)

More videos:

  • Review - Testing Angular with Cypress.io | Joe Eames | AngularConnect 2018

Preact.js videos

JS frameworks are replaceable

Category Popularity

0-100% (relative to Cypress.io and Preact.js)
Automated Testing
100 100%
0% 0
Javascript UI Libraries
0 0%
100% 100
Browser Testing
100 100%
0% 0
JavaScript Framework
0 0%
100% 100

User comments

Share your experience with using Cypress.io and Preact.js. For example, how are they different and which one is better?
Log in or Post with

Reviews

These are some of the external sources and on-site user reviews we've used to compare Cypress.io and Preact.js

Cypress.io Reviews

20 Best JavaScript Frameworks For 2023
Cypress is a holistic automation testing framework where the tester can perform unit, integration, end-to-end, and regression testing. Additionally, they may orchestrate and unify outcomes with quality measurements and useful insights that support the agile workplace by leveraging the Cypress cloud.
Top 10 Perfecto alternatives with Zebrunner on top
- is a SaaS web app for easy scaling test runs and debugging failed tests. Pairs with the open source Cypress Test Runner.
Source: zebrunner.com

Preact.js Reviews

Top JavaScript Frameworks in 2025
PreactJS is a JavaScript library that is said to be the fast 3Kb alternative to ReactJS using the same modern API. It implements the fastest virtual DOM compared to other frameworks in the market. Moreover, it is one of the smallest libraries in terms of size.
Source: solguruz.com
20 Next.js Alternatives Worth Considering
Preact is like React’s little sibling, smaller in size but with the same familiar moves. It’s cutting down the fluff and zipping through tasks with less overhead. When performance budgets are tight, Preact wiggles in perfectly.
20 Best JavaScript Frameworks For 2023
Preact is built with the same core principle of React – A component-based approach with Virtual DOM while completely compatible with React. It can even use React packages without compromising on speed, performance, and leaner size. In instances where the full potential of React isn’t necessary, most developers even use React during development and switch to Preact for...
Top 15 jQuery Alternatives To Know
ReactJS is a powerful JavaScript library to create user interfaces. Developers can design easy views at each stage in the application and there is regular update and rendering for the actual components whenever there is any data alteration. It is component-driven and creates encapsulated components that manage their own state.
Top 5 JavaScript Frameworks To Learn in 2021
But according to the graph above, we can notice a decrease in interest in Preact. This might result from having many similar frameworks with the same specs, like react-lite, Inferno, etc. However, knowing a framework like Preact will be useful for your development journey.
Source: enlear.academy

Social recommendations and mentions

Based on our record, Preact.js should be more popular than Cypress.io. It has been mentiond 93 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Cypress.io mentions (27)

  • Ensuring Web Accessibility with Cypress: A Comprehensive Guide
    Feature: Web Accessibility Tests Feature: Web Accessibility Tests Scenario Outline: Verify all WCAG Violations Given I am on the "" page And Verify all Accessibility Violations Scenario Outline: Verify P1,P2 WCAG Violations Given I am on the "" page And Verify only P1, P2 issues Examples: | url | | https://google.com | | https://amazon.in | | https://agoda.com | |... - Source: dev.to / 10 months ago
  • Simulating Internet Outage and Recovery using Cypress
    In this blog post, we'll explore a Cypress test that replicates this scenario, utilizing the powerful intercept command to manipulate network requests and responses. - Source: dev.to / over 1 year ago
  • Scraping a site?
    Maybe something like Cypress is what you're looking for? Cypress.io. Source: about 2 years ago
  • How to write tests in Django for JavaScript fetch
    You won't be able to test the javascript function itself from within python, but you can exercise the front-end code using something like cypress (https://cypress.io) or the older but still respectable selenium (https://selenium.dev). Source: about 2 years ago
  • What's your CI/CD flow made of?
    How are they run (services (ie. GitHub Action Runners, SauceLabs, Cypress.io, etc.), or self hosted autoscaling infrastructures)? Source: over 2 years ago
View more

Preact.js mentions (93)

View more

What are some alternatives?

When comparing Cypress.io and Preact.js, you can also consider the following products

Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.

Svelte - Cybernetically enhanced web apps

Katalon - Built on the top of Selenium and Appium, Katalon Studio is a free and powerful automated testing tool for web testing, mobile testing, and API testing.

Vue.js - Reactive Components for Modern Web Interfaces

Robot framework - Robot Framework is a generic test automation framework for acceptance testing and acceptance...

Inferno - An extremely fast React-like javascript library for building modern user interfaces.