head to head · open source
marketingskills vs Billion Mail
marketingskills has 53,618 GitHub stars, 7,975 forks, 154 open issues and last shipped today. Billion Mail has 15,862 stars, 1,743 forks, 236 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; Billion Mail is written in Go under AGPL-3.0. marketingskills has attracted 15% as many forks as stars, Billion Mail 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.
← all 20902 open source comparisons
Side by side
| marketingskills | Billion Mail | |
|---|---|---|
| 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 Billion Mail if
- You want the Billion Mail 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 Billion Mail 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 Billion Mail
BillionMail is an open source mail server and email marketing platform written in Go and released under the AGPL 3.0 license. It lives in the self hosted email ecosystem and is described as a solution for newsletters, promotional emails, and transactional messages. The project combines mail server topics such as Postfix, Dovecot, Rspamd, and SMTP with campaign features such as customer management, analytics, templates, and sending control.
read the full Billion Mail 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 marketingskills or Billion Mail more popular?
marketingskills has 53,618 GitHub stars and Billion Mail has 15,862. marketingskills has the larger community by that measure.
Are marketingskills and Billion Mail free?
Both are open source. marketingskills is licensed under MIT and Billion Mail under AGPL-3.0. Neither carries a licence fee.
What is the difference between marketingskills and Billion Mail?
marketingskills is written in JavaScript and Billion Mail 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 Billion Mail?
Choose marketingskills if you want the larger community (53,618 stars) or its MIT licence terms. Choose Billion Mail if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.