head to head · open source
Krayin vs warmbly
Krayin has 24,096 GitHub stars, 1,677 forks, 121 open issues and last shipped 2 days ago. warmbly has 866 stars, 159 forks, 17 open issues and last shipped yesterday. Krayin leads on adoption by 2,682% (24,096 vs 866 stars). Krayin is written in PHP under MIT; warmbly is written in Go under Apache-2.0. Krayin has attracted 7% as many forks as stars, warmbly 18%. warmbly 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
| Krayin | warmbly | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 866 |
| License | MIT | Apache-2.0 |
| Written in | PHP | Go |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 1.7K | ⑂ 159 |
| 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 warmbly if
- You want the warmbly feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and warmbly 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 warmbly
The open source agentic cold email and warmup platform. Features · How it works · Quick start · Self hosting · Docs · Community · Support ⭐ Help us reach more senders and grow the Warmbly community. Star this repo! Warmbly Warmbly runs cold email campaigns from the mailboxes you already own and warms them so they keep landing in the inbox. Opens, clicks, and replies land in a shared dashboard the moment they happen, and it's AI native, so your team and its agents work in it together, live. Features Campaigns multi step sequences with per mailbox caps and spacing Unified inbox every mailbox and reply in one place…
read the full warmbly overview →
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Frequently asked questions
Is Krayin or warmbly more popular?
Krayin has 24,096 GitHub stars and warmbly has 866. Krayin has the larger community by that measure.
Are Krayin and warmbly free?
Both are open source. Krayin is licensed under MIT and warmbly under Apache-2.0. Neither carries a licence fee.
What is the difference between Krayin and warmbly?
Krayin is written in PHP and warmbly in Go. 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 warmbly?
Choose Krayin if you want the larger community (24,096 stars) or its MIT licence terms. Choose warmbly if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.