SoapUI
9.0#1 in api clientsFrom $1,069 a yearFree planAPILinuxmacOSSelf-hosted
VisitSoapUI vs WhoisJSON API
WhoisJSON API
7.1#18 in api clientsFrom $10 a monthFree planWebAPILinuxmacOS
VisitWhat both publish
| Fact | SoapUI | WhoisJSON API |
|---|---|---|
| Free plan | Yes | Yes |
| Integrations | ReadyAPI documentation describes command-line and native Jenkins integration, plus Maven-based automation. | Official clients are listed for PHP, Python 3.7+, and Node.js, and the MCP server is described as compatible with Claude, Cursor, and Windsurf. |
SoapUI plans
- ReadyAPI trialFree
- SoapUI Open SourceFree
- ReadyAPI API Functional & Security Testing$1,069 a year
- ReadyAPI API & Service Virtualization$1,415 a year
- ReadyAPI Performance Small$7,389 a year
WhoisJSON API plans
- BasicFree
- Pro$10 a month
- Ultra$30 a month
- Scale$50 a month
- Mega$80 a month
- Giga$120 a month
Pick SoapUI if…
SoapUI suits developers and testers beginning API testing or building functional and regression tests. It can also fit teams that need API mocks, command-line runs or CI integrations.
Pick WhoisJSON API if…
You want what its maker publishes above — check its page for the details.