head to head · open source
Bruno vs swagger-core
Bruno has 47,992 GitHub stars, 3,068 forks, 1,831 open issues and last shipped yesterday. swagger-core has 7,534 stars, 2,255 forks, 197 open issues and last shipped 6 days ago. Bruno leads on adoption by 537% (47,992 vs 7,534 stars). Bruno is written in JavaScript under MIT; swagger-core is written in Java under Apache-2.0. Bruno has attracted 6% as many forks as stars, swagger-core 30%. Bruno was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (openapi, openapi3, rest-api), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| Bruno | swagger-core | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 7.5K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-11-02 | 2026-10-28 |
| Forks | ⑂ 3.1K | ⑂ 2.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Bruno if
- You weight community size — 48K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick swagger-core if
- You want the swagger-core feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and swagger-core fits your workflow better
About Bruno
Bruno Opensource IDE for exploring and testing APIs. English Українська Русский Türkçe Deutsch Français Português (BR) 한국어 বাংলা Español Italiano Română Polski 简体中文 正體中文 العربية 日本語 ქართული Nederlands فارسی Bruno is a new and innovative API client, aimed at revolutionizing the status quo represented by Postman and similar tools out there. Bruno stores your collections directly in a folder on your filesystem. We use a plain text markup language, Bru, to save information about API requests. You can use Git or any version control of your choice to collaborate over your API collections. Bruno is offline only. There…
read the full Bruno overview →
About swagger-core
Swagger Core NOTE: If you're looking for Swagger Core 1.5.X and OpenAPI 2.0, please refer to 1.5 branch. NOTE: Since version 2.1.7, Swagger Core also supports the Jakarta namespace. There are a parallel set of artifacts with the jakarta suffix, providing the same functionality as the unsuffixed (i.e.: javax ) artifacts. Please see the Wiki for more details. NOTE: Since version 2.2.0 Swagger Core supports OpenAPI 3.1; see this page for details Swagger Core is a Java implementation of the OpenAPI Specification. Current version supports JAX RS2 ( javax and jakarta namespaces). Get started with Swagger Core! See the…
read the full swagger-core overview →
More in Developer Tools
Related comparisons
More API Development & Testing projects
Compare either of these against the rest of the API Development & Testing field.
Frequently asked questions
Is Bruno or swagger-core more popular?
Bruno has 47,992 GitHub stars and swagger-core has 7,534. Bruno has the larger community by that measure.
Are Bruno and swagger-core free?
Both are open source. Bruno is licensed under MIT and swagger-core under Apache-2.0. Neither carries a licence fee.
What is the difference between Bruno and swagger-core?
Bruno is written in JavaScript and swagger-core in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Bruno or swagger-core?
Choose Bruno if you want the larger community (47,992 stars) or its MIT licence terms. Choose swagger-core if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.