head to head · open source
marketingskills vs BillionMail
marketingskills has 53,618 GitHub stars, 7,975 forks, 154 open issues and last shipped today. BillionMail has 15,862 stars, 1,743 forks, 239 open issues and last shipped 4 months ago. marketingskills leads on adoption by 238% (53,618 vs 15,862 stars). marketingskills is written in JavaScript under MIT; BillionMail is written in Go under AGPL-3.0. marketingskills has attracted 15% as many forks as stars, BillionMail 11%. marketingskills 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
| marketingskills | BillionMail | |
|---|---|---|
| GitHub stars | ★ 54K | ★ 16K |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | Go |
| Last push | 2026-10-08 | 2026-06-11 |
| Forks | ⑂ 8.0K | ⑂ 1.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick marketingskills if
- You weight community size — 54K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick BillionMail if
- You want the BillionMail feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go
- You evaluated both and BillionMail 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 BillionMail
BillionMail is an open source mail server, newsletter, and email marketing platform that runs entirely on infrastructure the operator controls. It is written in Go and released under the AGPL 3.0 license, and it lives in the self hosted email and marketing ecosystem alongside the mail transfer and delivery components it bundles, including Postfix, Dovecot, and Rspamd. The project ships as a complete stack rather than a single binary, combining a sending server, a campaign manager, and a webmail client so that one deployment covers transactional mail, promotional campaigns, and newsletters.
read the full BillionMail overview →
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Frequently asked questions
Is marketingskills or BillionMail more popular?
marketingskills has 53,618 GitHub stars and BillionMail has 15,862. marketingskills has the larger community by that measure.
Are marketingskills and BillionMail free?
Both are open source. marketingskills is licensed under MIT and BillionMail under AGPL-3.0. Neither carries a licence fee.
What is the difference between marketingskills and BillionMail?
marketingskills is written in JavaScript and BillionMail 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, marketingskills or BillionMail?
Choose marketingskills if you want the larger community (53,618 stars) or its MIT licence terms. Choose BillionMail if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.