swap_horiz FastAPI Alternatives

1

Postman

Postman has evolved from a simple Chrome extension into the ubiquitous platform for API development and testing, definin...

Monitoring Collaboration Affordable Freemium

9.5 Brilliant

2

AP

Apache JMeter

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

Legacy Open Source Plugin Performance Testing

9.4 Excellent

3

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

9.2 Excellent

4

Gatling

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

Enterprise Open Source Performance Testing Java

9.2 Excellent

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

9.1 Excellent

6

K6

k6

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

Cloud Performance Automation Open Source

9.0 Excellent

7

AM

Amazon Selling Partner API

The Amazon Selling Partner API allows businesses to automate order processing and fulfillment through third-party integr...

API Based Third Party Integration Automated Ordering

8.7 Very Good

8

API Fortress

API Fortress is an API testing tool that focuses on security and performance. It offers automated testing, continuous de...

Performance Testing Security Testing Continuous Delivery Automated Testing

8.7 Very Good

9

LoadRunner

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

Legacy Enterprise On Premise Comprehensive

8.7 Very 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

8.5 Very Good

11

TE

Testim.io

Testim.io is an AI-driven API and UI testing tool that supports cross-platform testing and continuous delivery. It offer...

Continuous Delivery Cross Platform Support UI Automation AI Driven Testing

8.1 Very Good

12

TI

TinCan API

The TinCan API, also known as Experience API (xAPI), is a standard for tracking learning experiences across various plat...

Data Tracking Scorm Compliance Learning Record Store

8.1 Very Good

13

RestAssured

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

Automation Open Source Java Bdd

8.0 Very Good

14

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

7.9 Good

15

Karate DSL

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

Performance Automation Open Source Web Testing

7.8 Good

16

ZA

ZAP (OWASP Zed Attack Proxy)

ZAP is an open-source API testing tool that focuses on security and ethical hacking. It offers advanced scanning feature...

Open Source Security Testing Web Application Security Ethical Hacking

7.8 Good

17

CL

Cloudmersive

Cloudmersive is a cloud-based API testing and validation platform that helps developers test, validate, and monitor APIs...

Automation Integration Cloud Based Software Development

7.8 Good

18

KA

Katalon Studio

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

All In One Automation AI Powered Low Code

7.4 Good

19

TE

TestProject

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

Free Tier Open Source Cloud Based Cross Platform

7.3 Good

20

TR

Tricentis Tosca

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

Enterprise Automation Oracle Low Code

7.0 Good