SoapUI is a widely popular API testing tool. It allows you to test REST and SOAP protocols. It facilitates seamless integrations and reusability of scripts. However, load and work flow testing is difficult with SoapUI.

Here, is a list of top 20 API testing tools which are good enough to replace SoapUI. This list consists of paid and open-source tools with important features and the latest download link.

1) Parasoft SOAtest

Best SoapUI Alternatives

Parasoft SOAtest is the industry-leading API testing solution, which simplifies the process of creating automated end-to-end test scenarios across multiple layers of modern applications (i.e. mobile, REST APIs, SOAP services, Microservices, databases, Web UIs, ESBs, or mainframes) from a single intuitive interface.

  • Rapid and scriptless test creation: Automatically generate tests from a service definition to test design of an API. Use drag and drop tools for data driving, looping and performing complex assertions
  • Save time building tests: SOAtest plug-in leverages artificial intelligence to automatically convert UI tests into scriptless API test scenarios
  • Change management: SOAtest can identify service schema changes and automatically update your library of tests
  • Maximum scalability: Integration for existing SDLC test frameworks and CI infrastructures. Seamless integration with load testing and service virtualization
  • Robust and flexible integration: Broad support for 120+ protocols and message formats including JMS, MQ, TCP, File, Copybook, FIX, EDI and many more

2) API Fortress

Best SoapUI Alternatives

API Fortress is a continuous testing platform for APIs. It is a platform, not a tool, which allows for true collaboration and workflow flexibility. Built for testers and engineers, it works across departments as a company-wide solution for continuous testing of APIs. Deployed in the cloud, or on-premises for complete data ownership.


  • Generate comprehensive functional tests from a payload or spec files such as Swagger, OpenAPI Specification, IO Docs, RAML, WSDL, and more.
  • Data-driven test support for CSVs, APIs, and Databases like JDBC
  • Seamlessly integrates with CI/CD platform including Jenkins, Bamboo, TravisCI, Microsoft TFS, and more.
  • Full dashboard and detailed test reports
  • Out-of-the-box integrations with Slack, Pagerduty, JIRA, Splunk, and Datadog
  • Load testing that goes beyond just a stress test but also validates the functionality under load
  • Comprehensive mocking capabilities to expedite the delivery of new APIs and save money

3) Rest Console

HTTP client and Request visualizer and constructor API testing tool. It helps developers to build, debug and test RESTful APIS.


  • Construct POST or PUT body via raw input
  • Easy query parameters creation
  • Add custom headers through intuitive UI
  • Keyboard navigation and shortcuts

Download link:

4) Tricentis

Top 6 API Testing Tools In 2017: REST & SOAP

Tricentis is a robust web services testing tool. Prominent API Testing features of Tricentis Tosca are –

  • It supports a wide array of protocols including HTTP(s) JMS, AMQP, Rabbit MQ, TIBCO EMS, SOAP, REST, IBM MQ,NET TCP
  • It integrates into the Agile and DevOps Cycle
  • It uses model-based test automation that makes script maintenance easy.
  • Enables end-to-end testing as API tests can be used across mobile, cross-browser, packaged apps, etc.

Tricentis’ 400+ customers include global names from the Top 500 brands such as ExxonMobil, HBO, Whole Foods, Toyota, Allianz, BMW, Starbucks, Deutsche Bank, Lexmark, Orange, A&E, Vantiv, Vodafone, Telstra and UBS.

Download link:

5) Hippie-Swagger

Hippie-swagger is a tool for testing APIS. It supports a clear assertion syntax, for extending test behavior. It also allows clean printing reports.


  • It will fail test whenever swagger documentation is either erroneous or missing
  • Readable and accurate assertation messages
  • Validated parameters, request, response, pats, etc.

Download link:

6) JMeter

JMeter is used for functional API testing which includes needed to test an API. It also has features which help to boost the performance of API testing.


  • It can be used for both static as well as dynamic resources performance testing
  • It supports replaying of test results
  • It can automatically work with CSV files. This helps test team to produce unique parameter values for API tests

Download link:

7) Rest-assured

It’s a popular framework to test REST services in Java.

Learn more about Rest-Assured

Download HttpMaster

8) Airborne

Airborne is an API automation testing tool used for testing Rest APIs.


  • Airborne is a programming framework, so it has no user interface apart from the text file to create code
  • To use airborne, you just need to remember a few key methods in the toolset and some ruby and rspec fundamentals

Download link:

9) APIpray Inspector

Apiary allows monitoring the API during the design phase by capturing both request and response. It allows the user to write API blueprints and lets the user view them Apiary editor or


  • Role-based access control over API documents.
  • It allows to add and remove team members from API design projects
  • API Blueprint management dashboard

Download link:

10) Apigee

Apigee is a cross-cloud API testing tool. It allows the user to measure and test API performance, supports and build API using other editors like Swagger. It offers security and governance policies across all APIs.


  • Allows to design monitor, deploy, and scale APIs
  • Easily create API proxies from the Open API Specification and deploy them in the cloud
  • Identify performance issues by tracking API traffic, error rates, and response times

Download link:

11) vREST

vREST provides an online solution for automated testing, mocking, automated recording and specification of REST/HTTP APIs/RESTful APIs.

  • It provides an exhaustive tool to quickly validate your REST APIs
  • It delivers zero defect web applications with less effort in API testing
  • To validate your web application no skilled resources are required, and it can generate documentation for your API specifications
  • API mocks can be created in vREST with the help of Mock Server Functionality. User can directly start developing frontend using mock HTTP requests

Link to Vrest

12) Pyresttest

PyRestTest is a Python-based REST API testing platform. It supports tests in JSON or YAML config files. Therefore, there is no code needed.


  • It’s minimal dependencies, which allows easy deployment on-server for smoke tests/health checks
  • This API testing tool will return exit codes on failure
  • Pyresttest allows to generate/extract and validate mechanisms to build test scenarios

Download link:

13) Ping API

Ping-API is API testing allows to write test script in JavaScript and CoffeeScript to test your APIs. It allows inspecting HTTP API call with a complete request and response data. For any failures, the user gets a notification through email, slack or Hipchat.


  • Ping- API to schedule test in every minutes or hour
  • Support for writing script to set request headers, body and URL parameters. It supports for writing script to validate response headers and body
  • Validate CRUD flow and log in to Ping API

Download link:

14) Postman

Postman is a plugin in Google Chrome, and it can be used for testing API services. It is a powerful HTTP client to test web services. For manual or exploratory testing, Postman is a good choice for testing API.

  • With Postman, almost all modern web API data can be extracted
  • You can write Boolean tests within Postman Interface
  • You can create a collection of REST calls and save each call as part of a collection for execution in future
  • Unlike CURL, it is not a command line based tool, which makes this tool hassle free of pasting text into command line window
  • For transmitting and receiving REST information, Postman is more reliable

Link to Postman

15) Karate DSL

Karate is a new API testing framework base on cucumber library. Karate DSL allows testers to write meaningful tests for web service using a domain-specific language.


  • It supports configuration switching/staging, multi-threaded parallel execution
  • Allows testing and generating reports just like any standard Java Project
  • Possible to write tests even for the non-programmers
  • The karate API testing tool allows re-use of payload-data and user-defined functions across tests.

Download link:

16) HttpMaster

It is a web development tool to automate web application testing, including API testing, service testing and website testing. It is primarily used as web API test tool to automate testing of web API calls.

HttpMaster is a best choice for API testing as it has got

  • Several http methods (GET, POST, DELETE etc.)
  • Dynamic parameters of various data types to make batches of different API requests
  • Various validation types and advanced validation expressions

Download HttpMaster

17) SOAP Sonar

SOAPSonar is an API testing and diagnostics platform for SOAP, XML, REST-based web services. Use external sources like Excel, MS SQL, Oracle or any ODBC Database for automated tests.


  • Identifies Web Services vulnerabilities like Malware Threat and SQL Injection
  • Web Service Functional Testing with Success Rule Framework and Concurrent Client Load Testing
  • Native HP QC Integration, and supports integration with Hudson, Ant, and JUnit

Download link:


It provides an extensible framework helpful in executing and building the functionality of headless system that do not have a user interface. It helps to test the headless technologies like Databases and Webservices, JMS, etc. By using the API test conversion tool, you can convert soapUI tests to UFT (QTP) API tests.

Download QTP