head to head · open source
Harness vs modern.js
Harness has 38,798 GitHub stars, 3,451 forks, 106 open issues and last shipped yesterday. modern.js has 5,051 stars, 425 forks, 66 open issues and last shipped yesterday. Harness leads on adoption by 668% (38,798 vs 5,051 stars). Harness is written in Go under Apache-2.0; modern.js is written in TypeScript under MIT. Harness has attracted 9% as many forks as stars, modern.js 8%. Harness was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Harness | modern.js | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 5.1K |
| License | Apache-2.0 | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.5K | ⑂ 425 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Harness if
- You weight community size — 39K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick modern.js if
- You want the modern.js feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and modern.js fits your workflow better
About Harness
Harness Harness Open Source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, hosted development environments (Gitspaces), and artifact registries. Overview Harness Open source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, Gitspaces, and artifact registries. Running Harness locally The latest publicly released docker image can be found on harness/harness. To install Harness yourself, simply run the command below. Once the container is up, you can visit in your browser. The Harness image uses a…
read the full Harness overview →
About modern.js
Modern.js Inspire creativity in modern web development. English 简体中文 Introduction The Modern.js framework is a progressive web framework based on React. At ByteDance, we use Modern.js to build upper level frameworks that have supported the development of thousands of web applications. When developing React applications, developers usually need to design implementation plans for certain features or use other libraries and frameworks to solve these problems. Modern.js supports all configurations and tools needed by React applications, and has built in additional features and optimizations. Developers can use React…
read the full modern.js overview →
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Frequently asked questions
Is Harness or modern.js more popular?
Harness has 38,798 GitHub stars and modern.js has 5,051. Harness has the larger community by that measure.
Are Harness and modern.js free?
Both are open source. Harness is licensed under Apache-2.0 and modern.js under MIT. Neither carries a licence fee.
What is the difference between Harness and modern.js?
Harness is written in Go and modern.js in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Harness or modern.js?
Choose Harness if you want the larger community (38,798 stars) or its Apache-2.0 licence terms. Choose modern.js if its feature set, stack or MIT licence fits better. Both are self-hostable.