swap_horiz Katalon Studio Alternatives

1

k6

k6, from Grafana Labs, is a modern, developer-centric, open-source load testing tool built for the cloud-native era. It...

Cloud Performance Open Source Developer Friendly

9.08 Excellent

2

Apache JMeter

Apache JMeter is the venerable, open-source standard for performance and load testing, with robust capabilities for func...

Open Source Plugin Performance Testing Load Testing

8.79 Great

3

LoadRunner

LoadRunner is the industry veteran of performance testing, known for its unparalleled support for legacy protocols and e...

Professional Complex Legacy Enterprise

8.67 Great

4

MuleSoft Anypoint Platform

MuleSoft Anypoint Platform is a comprehensive integration platform known for its robust API management capabilities and...

Customization Cloud Native Enterprise Integration Low Code

8.45 Great

5

Hoppscotch

Hoppscotch (formerly Postwoman) is a lightweight, open-source, web-based API client built as a Progressive Web App (PWA)...

Lightweight Open Source Web Based Rest

8.35 Great

6

Gatling

Gatling is a powerful, open-source load testing tool built on Scala, offering a code-based approach to test creation. It...

Performance Open Source Scalability Performance Testing

8.24 Great

7

RE

RestAssured

REST Assured is the de facto standard Java domain-specific language (DSL) for testing RESTful APIs. It simplifies testin...

Open Source Java Bdd Dsl

8.14 Great

8

Insomnia

Insomnia is a powerful, elegant, and open-source API client that has gained a strong following as a streamlined alternat...

Design Open Source Rest Graphql

8.03 Great

9

SoapUI Open Source

SoapUI Open Source is the free, community edition of the tool that evolved into ReadyAPI. It remains a powerful, standal...

Open Source Rest Soap Load Testing

7.94 Good

10

SmartBear ReadyAPI

ReadyAPI, built on the legacy of SoapUI Open Source, is a comprehensive, enterprise-grade functional API testing platfor...

Automation Soapui Performance Testing Security Testing

7.81 Good

11

Karate DSL

Karate DSL is a unique open-source tool that combines API test automation, performance testing, mocks, and even UI autom...

Performance Open Source Web Testing Java

7.81 Good

12

ZAP (OWASP Zed Attack Proxy)

ZAP, or OWASP Zed Attack Proxy, is a free, open source tool designed to assess web application security. It’s notable fo...

Free Modern Open Source Security Testing

7.59 Good

13

Assertible

Assertible is a specialized cloud service focused solely on continuous monitoring of APIs. It provides real-time insight...

Monitoring Automation Cloud Native Cloud Based

7.50 Good

14

Tricentis Tosca

Tricentis Tosca is a leading enterprise continuous testing platform that employs a unique model-based approach to test a...

Enterprise Oracle Model Based Codeless

7.24 Good

15

Runscope

Runscope is a comprehensive cloud platform designed for end-to-end API management and testing. It excels at continuous m...

Monitoring Enterprise Automation Cloud Native

7.15 Good

16

LoadRunner Cloud

LoadRunner Cloud is a cloud-based solution designed for comprehensive API testing. This tool facilitates distributed loa...

Performance Monitoring Enterprise Automation Cloud Based

7.07 Good

17

Testim.io

Testim.io is a cloud-based API testing tool leveraging artificial intelligence for modern application verification. It’s...

Modern Enterprise Automation AI Powered

6.95 Fair

18

Cypress.io

Cypress.io is a cloud-based web testing tool that allows developers to write and run end-to-end tests for their applicat...

Modern Automation Developer Cloud Based

6.74 Fair

19

TestProject

TestProject is a cloud-based test automation platform that supports API testing. Freelancers can leverage its cross-plat...

Collaborative Free Tier Automation Open Source

6.09 Fair

20

Flowling

Flowling is a visual API testing tool that allows you to create and execute tests using a drag-and-drop interface. It su...

Graphql API Testing Tool Visual Testing Rest API

5.65 Mediocre