head to head · open source
reaction vs CoolMallKotlin
reaction has 12,399 GitHub stars, 2,175 forks, 96 open issues and last shipped 7 months ago. CoolMallKotlin has 735 stars, 138 forks, 3 open issues and last shipped 5 months ago. reaction leads on adoption by 1,587% (12,399 vs 735 stars). reaction is written in JavaScript under GPL-3.0; CoolMallKotlin is written in Kotlin under MIT. reaction has attracted 18% as many forks as stars, CoolMallKotlin 19%. CoolMallKotlin was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ecommerce), 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.
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Side by side
| reaction | CoolMallKotlin | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 735 |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | Kotlin |
| Last push | 2026-03-01 | 2026-04-07 |
| Forks | ⑂ 2.2K | ⑂ 138 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick reaction if
- You weight community size — 12K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick CoolMallKotlin if
- You want the CoolMallKotlin feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Kotlin
- You evaluated both and CoolMallKotlin fits your workflow better
About reaction
Mailchimp Open Commerce, formerly Reaction Commerce, is an API first, headless commerce platform built on Node.js, MongoDB, and GraphQL for development teams that want to run a custom storefront, marketplace, or multi shop operation on their own infrastructure — and the project has been discontinued.
read the full reaction overview →
About CoolMallKotlin
青商城 🛍️ 基于 Kotlin 和 Jetpack Compose 的现代化电商应用 🌍 English 📖 项目简介 这是一个基于 Kotlin 和 Jetpack Compose 打造的开源电商学习项目，核心功能已基本完成。项目采用了 Google 推荐的应用架构和最佳实践，参考了 Now in Android 的架构设计，旨在展示如何运用现代 Android 开发技术构建一个完整的电商应用。项目具备完整的电商业务流程，包括用户认证、商品展示、购物车、订单支付等核心功能，适合开发者学习参考现代 Android 开发技术。 作为热爱技术的个人开发者，我将工作之外半年多的时间都投入到这个项目中。每一个功能的实现、每一次代码的优化，都是我在闲暇时间精心打磨的成果。尽管进度可能不如专职团队那么快，而且某些功能的实现还不够完善，但我会持续改进，不断完善。如果你对 Android 开发感兴趣，无论是学习还是共同创造，都欢迎加入。 如果项目对您有帮助，请给个 Star 支持 ⭐ 这对我来说很重要，能给我带来长期更新维护的动力！ 📱 项目预览 💡 说明 ：由于功能模块较多，截图不下，这里仅展示部分界面，可下载体验完整功能。 ☀️ 浅色模式 🌙 深色模式 🌈 主题 🌐 国际化 📍 项目地址 GitHub 地址 ： Gitee 地址 ： Demo 下载 🌟 提示 ：客服聊天和意见反馈功能均为真实可用的，大家给我的留…
read the full CoolMallKotlin overview →
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Frequently asked questions
Is reaction or CoolMallKotlin more popular?
reaction has 12,399 GitHub stars and CoolMallKotlin has 735. reaction has the larger community by that measure.
Are reaction and CoolMallKotlin free?
Both are open source. reaction is licensed under GPL-3.0 and CoolMallKotlin under MIT. Neither carries a licence fee.
What is the difference between reaction and CoolMallKotlin?
reaction is written in JavaScript and CoolMallKotlin in Kotlin. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, reaction or CoolMallKotlin?
Choose reaction if you want the larger community (12,399 stars) or its GPL-3.0 licence terms. Choose CoolMallKotlin if its feature set, stack or MIT licence fits better. Both are self-hostable.