SoapUI vs Swagger:Which is more popular?
In September 2026, SoapUI had more branded searches than Swagger among API development tools worldwide. SoapUI had about 27,100 branded searches, while Swagger had 15,200. SoapUI made up 18.3% of all API development tool searches we track, and Swagger accounted for 10.3%. When we asked ChatGPT and Google AI Overviews about API development tools, Swagger appeared in three of the five answers and SoapUI in two. Swagger was mentioned before SoapUI in every answer that named either.
Who do people search for more?
SoapUI, about 78% more searches than Swagger
Who does AI mention more?
Swagger, mentioned in 3 of 5 answers, SoapUI in 2
Who does AI recommend more?
Swagger, named ahead of SoapUI in 3 of 3 answers
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Top API development tools in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Swagger was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. SoapUI was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Swagger was listed before SoapUI in every answer that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
Postman5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Insomnia5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Bruno4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Swagger3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
k62 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers- SoapUI2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Hoppscotch2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Stoplight2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
See every answer about API development tools
5 answers
Asked ChatGPT
“Which API development tool should I use?”
Asked ChatGPT
“What are the best API development tools?”
Asked ChatGPT
“What's the best API development tool for testing APIs?”
Searched Google, AI Overview
“api development tools”
Searched Google, AI Overview
“rest api tool”
Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.
Is SoapUI or Swagger more popular in search?
This chart shows how often people search Google for SoapUI and Swagger by name. Each line represents a brand's share of searches for all eight API development tools we track, month by month, from English-language searches worldwide.
Share of searches by month for SoapUI, Swagger. The figures are in the table below the chart.
View monthly share of searches table
| Month | k6 | SoapUI | Postman | Swagger | Hoppscotch | Stoplight | Bruno | Insomnia |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 41.5% | 28.7% | 16% | 13.2% | 0.23% | 0.28% | 0.02% | 0.01% |
| Nov 2025 | 45.7% | 25.9% | 15% | 12.9% | 0.2% | 0.25% | 0.02% | 0.01% |
| Dec 2025 | 45% | 25.4% | 14.8% | 14.3% | 0.25% | 0.25% | 0.02% | 0.02% |
| Jan 2026 | 49.3% | 22.8% | 13.9% | 13.4% | 0.27% | 0.27% | 0.03% | <0.01% |
| Feb 2026 | 48.2% | 22.3% | 15.8% | 13% | 0.26% | 0.26% | 0.03% | 0.02% |
| Mar 2026 | 45.2% | 25.3% | 14.7% | 14.2% | 0.37% | 0.24% | 0.02% | 0.02% |
| Apr 2026 | 48.2% | 22.3% | 15.8% | 13% | 0.32% | 0.22% | 0.02% | 0.01% |
| May 2026 | 50.2% | 23.2% | 13.5% | 12.6% | 0.34% | 0.18% | 0.03% | <0.01% |
| Jun 2026 | 50.2% | 22.9% | 14% | 12.4% | 0.27% | 0.18% | 0.03% | <0.01% |
| Jul 2026 | 52.4% | 19.6% | 14.6% | 13% | 0.28% | 0.19% | 0.02% | <0.01% |
| Aug 2026 | 53.6% | 20% | 14.2% | 11.8% | 0.29% | 0.16% | 0.03% | <0.01% |
| Sep 2026 | 59.1% | 18.3% | 11.8% | 10.3% | 0.26% | 0.14% | 0.02% | <0.01% |
How has the SoapUI and Swagger comparison changed over the last 12 months?
3 findings
- SoapUI was ahead of Swagger in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, SoapUI’s share of searches among API development tools worldwide moved from 28.7% to 18.3%, and its estimated monthly branded searches moved from 49.5K to 27.1K.
- Across the 12 months ending September 2026, Swagger’s share of searches among API development tools worldwide moved from 13.2% to 10.3%, and its estimated monthly branded searches moved from 22.8K to 15.2K.
How did search popularity change for API development tools worldwide in September 2026?
2 changes
In September 2026, SoapUI lost share of searches among API development tools worldwide, from 20% to 18.3%.
In September 2026, Swagger lost share of searches among API development tools worldwide, from 11.8% to 10.3%.
How are branded searches counted?
5 search terms
Brandwave collects information about searches that people make online using SoapUI’s and Swagger’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Other head-to-heads among API development tools
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