SoapUI vs Postman: Which is Better in 2026?
Choosing between SoapUI and Postman comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
SoapUI
The world's most popular open-source API testing tool for REST, SOAP, and GraphQL.
Best for you if:
- • Open-source API testing tool for REST, SOAP, and GraphQL.
- • Focuses on basic functional testing capabilities.
Postman
API platform for building and using APIs
Best for you if:
- • Industry-standard API platform supporting HTTP, GraphQL, gRPC, WebSocket, and MQTT in one workspace
- • Free tier includes unlimited collection runs, mock servers, and 50 AI credits per month
| At a Glance |  SoapUI |  Postman |
|---|---|---|
Starts at | Contact us/moReadyAPI | $9/monthSolo |
Best For | API Tools | API Tools |
Rating | - | - |
Choose SoapUI or Postman?
Choose SoapUI if
The world's most popular open-source API testing tool for REST, SOAP, and GraphQL.
- Completely free and open-source
- Supports multiple API protocols
- Widely used and trusted in the API testing community
Choose Postman if
API platform for building and using APIs
- Supports virtually every API protocol in one unified interface
- Generous free tier with unlimited collection runs and mock servers
- Industry-leading collaboration features for distributed teams
| Feature | SoapUI | Postman |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | ★4.5/5 168 reviews | ★4.7/5 2,287 reviews |
| Categories | API ToolsTesting & QA | API ToolsDeveloper Tools |
In-Depth Analysis
SoapUI
The world's most popular open-source API testing tool for REST, SOAP, and GraphQL.
Strengths
- +Completely free and open-source
- +Supports multiple API protocols
- +Widely used and trusted in the API testing community
- +Good for individual users and learning API testing fundamentals
Weaknesses
- -Limited automation capabilities (requires scripting)
- -No native CI/CD integrations
- -Data-driven testing not directly available
Key features
Postman
API platform for building and using APIs
Strengths
- +Supports virtually every API protocol in one unified interface
- +Generous free tier with unlimited collection runs and mock servers
- +Industry-leading collaboration features for distributed teams
- +Extensive ecosystem with pre-built integrations and community collections
- +Built-in AI credits for generating tests, documentation, and queries
Weaknesses
- -Desktop app can consume significant memory with large collections
- -AI credit limits may feel restrictive on Free and Solo plans
- -Enterprise features like RBAC and audit logs require the highest tier
- -Steep learning curve for advanced features like Flows and monitoring
- -Cloud-first approach may concern teams with strict data residency needs
Key features
Pricing: SoapUI vs Postman
| Plan | SoapUI | Postman |
|---|---|---|
| Tier 1 | Contact us ReadyAPI | Free Free |
| Tier 2 | Free SoapUI Open Source | $9 month Solo |
| Tier 3 | N/A | $19 month Team |
| Tier 4 | N/A | $49 month Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on SoapUI pricing and Postman pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: SoapUI
Want the highest-rated option?
Neither has user reviews yet.
Go with: SoapUI
Value user reviews?
Neither has user reviews yet.
Go with: Postman
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Both are api tools tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Postman
- Higher user rating: 4.7/5 vs 4.5/5
- Larger review base (2,287 reviews)
- Free tier available
- Our pick for this comparison
SoapUI
- Choose if you want the world's most popular open-source API testing tool for REST, SOAP, and GraphQL
The Bottom Line
Postman is our pick.
Frequently Asked Questions
Is SoapUI or Postman better?
Postman is rated in our evaluation. Both are freemium.
What are SoapUI and Postman used for?
SoapUI: The world's most popular open-source API testing tool for REST, SOAP, and GraphQL.. Postman: API platform for building and using APIs.
What does SoapUI cost vs Postman?
SoapUI is freemium (free tier + paid plans). Postman is freemium (free tier + paid plans). Visit their websites for detailed pricing.