SoapUI / ReadyAPI
The professional API testing platform for complex enterprise workflows. Best for SOAP, REST, and GraphQL testing at scale.
Overview
SoapUI, created by SmartBear in 2005, is one of the oldest dedicated API testing tools. The open-source SoapUI supports functional testing of SOAP and REST APIs with a GUI-based test builder. ReadyAPI is the commercial evolution, adding performance testing, security scanning, virtualization, and reporting.
In 2026, SoapUI/ReadyAPI remains relevant for enterprise teams with heavy SOAP legacy (financial services, government, healthcare) and complex API orchestration requirements that simpler tools cannot handle.
What it's used for
SoapUI/ReadyAPI is the right choice when:
- SOAP services are primary: Many legacy enterprise systems still use SOAP — SoapUI has the best SOAP support in the industry.
- Complex data-driven testing: Parameterise tests with Excel, databases, or custom data sources.
- API virtualization needed: Create mock services for dependent APIs that are unavailable during testing.
- Security scanning: ReadyAPI includes built-in security scans for common API vulnerabilities.
Pros & Cons
Pros
- Best-in-class SOAP support
- Powerful data-driven testing with external data sources
- API virtualization (ServiceV) for stubbing dependencies
- Security scanning built into ReadyAPI
- Comprehensive reporting and analytics
Cons
- Heavy and resource-intensive compared to Postman or REST Assured
- UI feels dated compared to modern tools
- Expensive: ReadyAPI licenses start at thousands per year
- Overkill for simple REST API testing
- Smaller community than Postman
Platforms & Integrations
SoapUI runs on Windows, macOS, and Linux. ReadyAPI is Windows-primary with macOS/Linux support. Both support SOAP, REST, GraphQL, and JMS.
Pricing
| Tier | Cost | Includes |
|---|---|---|
| SoapUI Open Source | Free | Functional testing, SOAP/REST support, basic reporting |
| ReadyAPI Test | $779/yr | Advanced testing, data-driven tests, CI integration |
| ReadyAPI Pro | $2,299/yr | Performance, security, virtualization, advanced analytics |
NZ Context
SoapUI is common in NZ government and banking sectors where SOAP services persist. The IRD's older web services, for example, are SOAP-based. However, most NZ startups and modern SaaS companies have moved to Postman or code-based API testing. ReadyAPI is rarely seen outside large enterprises due to cost.
Alternatives
- Postman — Modern, lighter, and better for REST-first teams.
- REST Assured — Code-based Java alternative for teams that want tests in version control.
- Karate — BDD-style API testing with built-in performance and mocking.