AI assistants most often recommend Postman for API testing tools in 🇯🇵 Japan (日本語), naming it in 100% of the buyer questions we tested, followed by SoapUI and GitHub Copilot. We asked an AI model the questions buyers ask about API testing tools and tallied which brands it named most — "share of voice" in AI answers, who AI recommends when no human is watching.
| # | Brand | AI share of voice |
|---|---|---|
| 1 | Postman | 6/6 (100%) |
| 2 | SoapUI | 5/6 (83%) |
| 3 | GitHub Copilot | 5/6 (83%) |
| 4 | JMeter | 2/6 (33%) |
| 5 | Notion | 2/6 (33%) |
| 6 | Apigee | 2/6 (33%) |
| 7 | AWS API Gateway | 1/6 (17%) |
Method: 6 representative buyer questions via a large language model, 🇯🇵 Japan (日本語). Updated 6/24/2026. A proxy for how AI assistants describe this category.
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