head to head · open source
Krayin vs mailtrain
Krayin has 24,096 GitHub stars, 1,677 forks, 121 open issues and last shipped 2 days ago. mailtrain has 5,754 stars, 706 forks, 116 open issues and last shipped 1.1 years ago. Krayin leads on adoption by 319% (24,096 vs 5,754 stars). Krayin is written in PHP under MIT; mailtrain is written in JavaScript under GPL-3.0. Krayin has attracted 7% as many forks as stars, mailtrain 12%. Krayin 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.
← all 20902 open source comparisons
Side by side
| Krayin | mailtrain | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 5.8K |
| License | MIT | GPL-3.0 |
| Written in | PHP | JavaScript |
| Last push | 2026-11-01 | 2025-10-05 |
| Forks | ⑂ 1.7K | ⑂ 706 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Krayin if
- You weight community size — 24K stars and counting
- You want the MIT license terms
- Your stack matches PHP
- You value the larger contributor base for long-term maintenance
pick mailtrain if
- You want the mailtrain feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and mailtrain fits your workflow better
About Krayin
Topics 1. Introduction 2. Documentation 3. Requirements 4. Installation & Configuration 4. Docker Installation 5. Krayin Cloud System 6. License 7. Security Vulnerabilities Introduction Krayin CRM is a hand tailored CRM framework built on some of the hottest opensource technologies such as Laravel (a PHP framework) and Vue.js a progressive Javascript framework. Free & Opensource Laravel CRM solution for SMEs and Enterprises for complete customer lifecycle management. Read our documentation: Krayin CRM Docs We also have a forum for any type of concerns, feature requests, or discussions. Please visit: Krayin CRM…
read the full Krayin overview →
About mailtrain
Mailtrain v2 Mailtrain is a self hosted newsletter application built on Node.js (v14+) and MySQL (v8+) or MariaDB (v10+). This is version 2 of Mailtrain. It mostly implements all features of v1 and add some more. It is a complete rewrite, so you will have to install it from scratch. If you are upgrading from Mailtrain v1, backup the DB and use it for Mailtrain v2. Mailtrain v2 should be able to upgrade the DB to the new schema. Features Subscriber lists management List segmentation Custom fields Email templates (including MJML based templates) Custom reports Automation (triggered and RSS campaigns) Multiple…
read the full mailtrain overview →
More in Business Software
Related comparisons
More Marketing & Customer Engagement projects
Compare either of these against the rest of the Marketing & Customer Engagement field.
Frequently asked questions
Is Krayin or mailtrain more popular?
Krayin has 24,096 GitHub stars and mailtrain has 5,754. Krayin has the larger community by that measure.
Are Krayin and mailtrain free?
Both are open source. Krayin is licensed under MIT and mailtrain under GPL-3.0. Neither carries a licence fee.
What is the difference between Krayin and mailtrain?
Krayin is written in PHP and mailtrain in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Krayin or mailtrain?
Choose Krayin if you want the larger community (24,096 stars) or its MIT licence terms. Choose mailtrain if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.