head to head · open source
marketingskills vs mailcheap
marketingskills has 54,784 GitHub stars, 8,115 forks, 154 open issues and last shipped yesterday. mailcheap has 933 stars, 233 forks, 8 open issues and last shipped today. marketingskills leads on adoption by 5,772% (54,784 vs 933 stars). marketingskills is written in JavaScript under MIT; mailcheap is written in JavaScript under AGPL-3.0. marketingskills has attracted 15% as many forks as stars, mailcheap 25%. mailcheap was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-agents), 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
| marketingskills | mailcheap | |
|---|---|---|
| GitHub stars | ★ 55K | ★ 933 |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-10-14 | 2026-10-15 |
| Forks | ⑂ 8.1K | ⑂ 233 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick marketingskills if
- You weight community size — 55K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick mailcheap if
- You want the mailcheap feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and mailcheap fits your workflow better
About marketingskills
marketingskills is a free, MIT licensed collection of marketing skills for Claude Code, OpenAI Codex, Cursor, Windsurf, and any agent that supports the Agent Skills spec, aimed at technical marketers and founders who want AI coding agents to handle conversion optimization, copywriting, SEO, analytics, and growth engineering.
read the full marketingskills overview →
About mailcheap
MailCheap is an open source newsletter application in JavaScript — dashboard, public archive, REST API and MCP server in one Next.js app — for writers, teams and agent builders who want to keep their subscriber list in their own database and pay a sending provider per email instead of paying a platform per subscriber.
read the full mailcheap overview →
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Frequently asked questions
Is marketingskills or mailcheap more popular?
marketingskills has 54,784 GitHub stars and mailcheap has 933. marketingskills has the larger community by that measure.
Are marketingskills and mailcheap free?
Both are open source. marketingskills is licensed under MIT and mailcheap under AGPL-3.0. Neither carries a licence fee.
What is the difference between marketingskills and mailcheap?
marketingskills is written in JavaScript and mailcheap 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, marketingskills or mailcheap?
Choose marketingskills if you want the larger community (54,784 stars) or its MIT licence terms. Choose mailcheap if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.