swap_horiz Gatling Alternatives

1

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

9.6 Brilliant

2

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

9.0 Excellent

3

LoadRunner

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

Professional Complex Legacy Enterprise

8.9 Great

4

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

8.8 Great

5

GTmetrix

GTmetrix combines the strengths of Google PageSpeed Insights and YSlow, providing a comprehensive performance analysis i...

Free Performance SEO Tool Page Speed

8.5 Great

6

API Fortress

API Fortress is a dedicated API security testing tool that automates the process of identifying vulnerabilities in REST...

Modern Enterprise Automation Security Focused

8.5 Great

7

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

8.3 Great

8

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

8.3 Great

9

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

8.2 Great

10

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

8.2 Great

11

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

8.2 Great

12

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

8.1 Great

13

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

8.1 Great

14

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

7.8 Good

15

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

7.6 Good

16

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

7.5 Good

17

Katalon Studio

Katalon Studio is a versatile, low-code automation platform that powerfully integrates API, Web, and Mobile testing into...

All In One AI Powered Low Code Web Testing

7.4 Good

18

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

7.3 Good

19

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

7.1 Good

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

5.7 Mediocre