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Violentmonkey VS Katalon

Compare Violentmonkey VS Katalon and see what are their differences

JackHamr
AI agents that spec, build, test, and ship code โ€” with voice chat, deep GitHub integration, and zero LLM markup. featured
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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Violentmonkey logo Violentmonkey

Violentmonkey is a userscript manager to support running userscripts in web pages.

Katalon logo 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.
  • Violentmonkey Landing page
    Landing page //
    2023-10-16
  • Katalon Landing page
    Landing page //
    2022-09-19

Violentmonkey features and specs

  • Free and Open Source
    Violentmonkey is freely available to use and the source code is open for anyone to inspect, modify, and contribute to. This ensures transparency and community-driven development.
  • Active Development
    The project is actively maintained and updated, which means that bugs are fixed promptly and new features are regularly added.
  • Cross-Browser Support
    Violentmonkey is compatible with multiple browsers including Chrome, Firefox, Microsoft Edge, and Opera, providing flexibility to users regardless of their browser preference.
  • User Script Manager
    It allows users to manage and run custom scripts to enhance web pages, providing extensive customization options for a tailored browsing experience.
  • Easy Backup and Sync
    Features like backup and sync allow users to easily transfer their settings and scripts across different devices, ensuring a consistent experience.

Possible disadvantages of Violentmonkey

  • Learning Curve
    For new users, especially those not familiar with scripting, there might be a learning curve involved in understanding how to write and manage scripts effectively.
  • Security Risks
    As with any tool that runs third-party scripts, there is a potential risk for malicious scripts that can compromise user security and privacy if not properly vetted.
  • Dependency on Community Scripts
    The quality and functionality of Violentmonkey heavily rely on the availability and maintenance of user-submitted scripts, which can vary in quality.
  • Browser Performance Impact
    Running multiple or poorly optimized scripts can affect browser performance by increasing loading times and resource consumption.

Katalon features and specs

  • User-Friendly Interface
    Katalon's intuitive and easy-to-navigate interface lowers the barrier for entry, making it simple for both novice and experienced testers to create and manage automated tests.
  • Cross-Browser Testing
    It supports automated testing across different browsers and platforms, ensuring consistent behavior of applications in various environments.
  • Integrated Reporting
    Katalon offers robust reporting and dashboard features, providing detailed insights and analytics on test execution and results.
  • Built-in Keywords
    The platform includes a comprehensive library of built-in keywords for web, API, mobile, and desktop testing, reducing the need for custom scripting.
  • Community and Support
    An active community along with comprehensive documentation and professional support services help users troubleshoot issues and share best practices.
  • Cost-Effective
    Offering both free and paid versions, Katalon is cost-effective and accessible for both small teams and large enterprises.
  • Integration Capabilities
    Katalon integrates well with popular CI/CD tools, version control systems, and other DevOps tools, enabling seamless workflows.

Possible disadvantages of Katalon

  • Performance Issues
    Some users report performance lags and slow test execution speeds, especially when dealing with large test suites.
  • Limited Scripting Language Options
    Katalon primarily supports Groovy for scripting, which could be a limitation for teams accustomed to other languages like Python or JavaScript.
  • Resource Intensive
    The platform can be resource-heavy, requiring robust hardware to run efficiently, which could be a concern for smaller setups or limited environments.
  • Steep Learning Curve for Advanced Features
    While the interface is user-friendly, advanced features and customizations have a steep learning curve that might require significant time investment.
  • Limited Mobile Testing Features
    Mobile testing capabilities, while present, are not as mature or extensive as some specialized mobile testing tools.
  • Pricing for Enterprise Features
    Advanced features and extensive support come at a cost, which might be a hurdle for smaller teams or organizations with limited budgets.
  • Integration Limitations
    Although Katalon integrates with many tools, it still lacks compatibility with some niche or less popular systems.

Analysis of Violentmonkey

Overall verdict

  • Yes, Violentmonkey is a reliable and efficient userscript manager that caters to the needs of users who want to customize their web browsing experience.

Why this product is good

  • Violentmonkey is considered a good choice for users looking to manage userscripts on their web browsers. It provides a clean and straightforward interface, supports a wide range of script sources, and is compatible with multiple browsers including Chrome, Firefox, and Edge. Moreover, it is open-source, allowing for community contributions and transparency.

Recommended for

  • Tech-savvy users interested in enhancing their web browser functionality through userscripts.
  • Developers who want to test userscripts in a flexible environment.
  • Users looking for an open-source alternative to other popular script managers like Greasemonkey or Tampermonkey.

Analysis of Katalon

Overall verdict

  • Katalon is a highly regarded tool in the test automation field. It offers a comprehensive solution for both beginner and advanced users, making it an effective choice for many organizations looking to implement automated testing.

Why this product is good

  • Katalon is considered a good option for test automation due to its user-friendly interface, extensive support for different types of testing such as web, API, mobile, and desktop applications, and its integration with a variety of tools like CI/CD pipelines, version control systems, and issue tracking tools. It provides built-in keywords, dual scripting interfaces (manual and Groovy scripting), and robust reporting capabilities, which streamline the test automation process for users with varying levels of expertise.

Recommended for

    Katalon is recommended for software testing teams and quality assurance professionals who are seeking a cost-effective and versatile automation tool. It's especially well-suited for those who work with diverse technologies and want an all-in-one platform for their test automation needs. Its ease of use makes it accessible for those new to automation, while its advanced features cater to more experienced testers.

Violentmonkey videos

+ Add

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Katalon videos

+ Add

Katalon Studio: Advantage and Disadvantage to Katalon Studio

More videos:

  • Review - TestProject vs Katalon Studio - An Complete comparison
  • Review - QnA Friday 20 - Selenium or Katalon Studio ? โญโญโญ

Category Popularity

0-100% (relative to Violentmonkey and Katalon)

Violentmonkey

Katalon

Browser Extensions
100 100%
Browser Extensions
0% 0
Automated Testing
0 0%
Automated Testing
100% 100
Dark Mode
100 100%
Dark Mode
0% 0
Website Testing
0 0%
Website Testing
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Violentmonkey and Katalon

Violentmonkey Reviews

We have no reviews of Violentmonkey yet.
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Katalon Reviews

Top 20 Open Source & Cloud Free Postman Alternatives (2024 Updated)
Katalon Studio is an integrated environment for API, web, desktop, and mobile testing. It provides a rich feature set for comprehensive testing.
Source: medium.com
Top Selenium Alternatives
Katalon Studio is a versatile testing platform that provides a comprehensive solution for web, API, mobile, and desktop application testing. It's designed for users of all technical levels and features codeless test creation, a friendly UI, and the ability to integrate with various tools and frameworks. Katalon platforms offers both automated and exploratory testing,...
Source: bugbug.io
15 Best Postman Alternatives for Automated API Testing [2022 Updated]
API testing in Katalon Studio is a comprehensive feature that supports all sorts of REST, SOAP/1.1, and SOAP/1.2 calls. Katalon Studio allows testers to collaborate in multiple ways on their API project, including keyword-driven testing and Page Object Model (POM) testing. Katalonโ€™s API automation IDE offers the best functionality for scripting, debugging, and maintaining...
Source: testsigma.com
Best Automation Testing Tools (Free and Paid) | July 2022
Katalon Studio is a simple and powerful automation solution built by KMS Technology for testers everywhere. The tool provides comparable features to popular commercial solutions whilst eliminating the effort to build an automation framework from open sources. Best of all, weโ€™re committed to keeping Katalon Studio free.
Source: www.softwaretestingmaterial.com
20 BEST Selenium Alternatives in 2021
Trusted by over half a million users, Katalon Studio offers the best of both worlds of Selenium & Appium by eliminating their complexities while still remaining a powerful automation solution with advanced features.
Source: www.guru99.com

Social recommendations and mentions

Based on our record, Violentmonkey should be more popular than Katalon. It has been mentiond 46 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.

Violentmonkey mentions (46)

  • Show HN: UserScript to manually choose model for ChatGPT website
    - GPT 4o mini, so you can save your 4o calls for more complex queries https://github.com/altbdoor/userscripts/raw/master/force-gpt3.user.js. - Source: Hacker News / almost 2 years ago
  • If your Firefox suddenly started to hang or become extremely slow today, check if you have tampermonkey 5.0. Disable it for now as it seems to be the culprit.
    Since Tampermonkey seems to be misbehaving, consider using Violentmonkey. Source: over 2 years ago
  • Current plan for the flag
    Step 1Install violentmonkey (or your favorite user script manager). Source: almost 3 years ago
  • Andrej Karpathy โ€“ State of GPT ( At MSBuild 2023)
    Sounds like a good violent monkey [0] script for you do this weekend. :) [0] https://violentmonkey.github.io/. - Source: Hacker News / about 3 years ago
  • Auto expand for reports button in modqueue
    Toolbox is great, but if that is all you really need, here's this! You can copy and paste this as a new script to use in ViolentMonkey [AMO] or whatever script manager you use. Source: about 3 years ago
View more

Katalon mentions (12)

  • How to Consolidate Your QA Toolstack: A Practical Buyer's Guide
    Katalon True Platform is designed for teams making the transition from fragmented toolstacks to a unified quality system. It covers the full testing lifecycle in one platform: manual testing, test automation, test management, test execution (cloud and local), reporting and analytics, and production monitoring. That is typically four to five separate tools collapsed into one, with a single data layer underneath. - Source: dev.to / about 2 months ago
  • Top 6 AI API Testing Tools for Developers (2026)
    TL;DR: For AI-native test generation from specs, try Kusho AI. For the most complete platform with the newest AI Agent Mode, go Postman. For open-source and Git-native workflows, Bruno or Hoppscotch are your best bets. Enterprise teams should evaluate Katalon. Collaboration-first smaller teams will like Testfully. - Source: dev.to / 4 months ago
  • Top 5 AI Test Case Generation Tools to Boost Your API Testing in 2025
    Overview: Katalon Studio now offers a beta AI test case generator capable of producing test scenarios from OpenAPI/Swagger specifications. - Source: dev.to / 9 months ago
  • Top 10 AI Testing Tools You Need In 2025
    Katalon Studio integrates AI features like test object auto-healing and smart wait functionality. It simplifies testing across web, mobile, and APIs with minimal setup and has built-in CI/CD support. The platform also supports advanced analytics for deeper test insights. - Source: dev.to / about 1 year ago
  • 25 Best SaaS Testing Tools [2024]
    Katalon Studio is designed to provide a comprehensive testing platform for visual, web, API, mobile, and desktop applications. It is one of the best SaaS testing tools due to its user-friendly interface and robust features, which help teams streamline their testing processes and deliver high-quality software without bugs, enhancing overall digital experiences. - Source: dev.to / over 1 year ago
View more

What are some alternatives?

When comparing Violentmonkey and Katalon, you can also consider the following products

Greasemonkey - Customize the way a web page displays or behaves, by using small bits of JavaScript.

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.

Tampermonkey - Greasemonkey compatible script manager.

Testsigma - Complete AI-driven Test Automation platform for Web apps, Mobile apps and APIs. Simple English commands to automate complex tests easily and effectively with all the flexibility that enterprise teams need!

Greasy Fork - A site for user scripts.

TestMu AI (Formerly LambdaTest) - Worldโ€™s first full-stack Agentic AI Quality Engineering platform.

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