SoapUI vs Prism

SoapUI7.4Visit Prism6.9Visit

Higher score SoapUI #4 in API Development Tools 7.4/10 Free plan Free plan✓ 0 of 4 features Visit SoapUI

vs

Prism #7 in API Development Tools 6.9/10 Free plan Free plan✓ 0 of 4 features Visit Prism

• SoapUI fits best

  Teams testing REST and SOAP APIs at no cost

• Prism fits best

  Teams needing OpenAPI mocks and contract validation

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Side by side

Feature	SoapUI 7.4/10 Visit ↗	Prism 6.9/10 Visit ↗
At a glance
Editor score	7.4	6.9
Ranking	#4 in API Development Tools	#7 in API Development Tools
Best for	Teams testing REST and SOAP APIs at no cost	Teams needing OpenAPI mocks and contract validation
Pricing model	Free	Free
Starting price	Not published	Not published
Free plan	✓	✓
Free trial	—	—
Deployment	Desktop	Cloud, Self-hosted
Platforms	Windows, macOS, Linux	Web
Support	Community, Docs	Community, Docs
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features SoapUI 0/4 · Prism 0/4
API design	Not published	Not published
API testing	Not published	Not published
Mock servers	Not published	Not published
Version control	Not published	Not published
Specs
API spec formats	Not published	Not published
Deployment	Not published	Not published
Our review
Pros	Tests REST, SOAP/WSDL, and GraphQL APIs in one desktop tool Includes functional, regression, load, mocking, and contract coverage Supports command-line execution and CI/build integrations	Generates HTTP mocks from OpenAPI v2, v3.0 and v3.1 documents Validates requests and responses against an API contract Supports dynamic examples, callbacks and CI usage
Cons	Desktop deployment limits access to Windows, macOS, and Linux environments Support channels are limited to community and documentation Teams needing broader workspace integrations may find it less flexible	Focused on mocking and validation rather than broad API authoring Hosted mock servers are a separate Stoplight offering Support channels are community and documentation
Our verdict	SoapUI is a free, open-source desktop application for developers and testers working with APIs and web services. It supports REST, SOAP/WSDL, and GraphQL requests across Windows, macOS, and Linux. The product fits solo developers, small… Read the review →	Prism is an open-source HTTP mock server and validation proxy for frontend and backend developers working before an API backend is complete, as well as teams doing contract testing in development or pre-production. It creates mock APIs… Read the review →

Strengths and trade-offs

• SoapUI — where it wins

  • Tests REST, SOAP/WSDL, and GraphQL APIs in one desktop tool
  • Includes functional, regression, load, mocking, and contract coverage
  • Supports command-line execution and CI/build integrations

  Where it doesn't

  • Desktop deployment limits access to Windows, macOS, and Linux environments
  • Support channels are limited to community and documentation
  • Teams needing broader workspace integrations may find it less flexible

• Prism — where it wins

  • Generates HTTP mocks from OpenAPI v2, v3.0 and v3.1 documents
  • Validates requests and responses against an API contract
  • Supports dynamic examples, callbacks and CI usage

  Where it doesn't

  • Focused on mocking and validation rather than broad API authoring
  • Hosted mock servers are a separate Stoplight offering
  • Support channels are community and documentation

• SoapUI7.4/10 · Free plan

  A free desktop API tester with broad protocol coverage and CI automation.

  Visit SoapUIFull verdict →
• Prism6.9/10 · Free plan

  A focused choice for teams that need API mocks and contract checks, not broad authoring tools.

  Visit PrismFull verdict →