head to head · open source
claude-seo vs BillionMail
claude-seo has 25,931 GitHub stars, 3,395 forks, 19 open issues and last shipped 2 days ago. BillionMail has 16,171 stars, 1,801 forks, 239 open issues and last shipped 5 months ago. claude-seo leads on adoption by 60% (25,931 vs 16,171 stars). claude-seo is written in Python under MIT; BillionMail is written in Go under AGPL-3.0. claude-seo has attracted 13% as many forks as stars, BillionMail 11%. claude-seo 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
| claude-seo | BillionMail | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 16K |
| License | MIT | AGPL-3.0 |
| Written in | Python | Go |
| Last push | 2026-11-01 | 2026-06-11 |
| Forks | ⑂ 3.4K | ⑂ 1.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick claude-seo if
- You weight community size — 26K stars and counting
- You want the MIT license terms
- Your stack matches Python
- 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 claude-seo
Claude SEO: SEO Skill for Claude Code Claude SEO is an open source SEO analysis plugin for Claude Code. It runs 25 sub skills and 18 specialist agents in parallel across technical SEO, content quality (E E A T), Schema.org markup, AI search optimization (GEO), local SEO, e commerce, and international SEO. Every audit produces a prioritized action plan with testable recommendations grounded in primary source guidance from Google. Two versions of this skill. 🌐 Public open source → AgriciDaniel/claude seo : MIT, public releases, no membership. Use this if you want stable + downloadable. 🔒 Community private mirror…
read the full claude-seo overview →
About BillionMail
BillionMail 📧 An Open Source MailServer, NewsLetter, Email Marketing Solution for Smarter Campaigns [![][license shield]][license link] [![][docs shield]][docs link] [![][github release shield]][github release link] [![][github stars shield]][github stars link] English 简体中文 日本語 Türkçe What is BillionMail? BillionMail is a future open source Mail server, Email marketing platform designed to help businesses and individuals manage their email campaigns with ease. Whether you're sending newsletters, promotional emails, or transactional messages, this tool will provide full control over your email marketing efforts…
read the full BillionMail overview →
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Frequently asked questions
Is claude-seo or BillionMail more popular?
claude-seo has 25,931 GitHub stars and BillionMail has 16,171. claude-seo has the larger community by that measure.
Are claude-seo and BillionMail free?
Both are open source. claude-seo is licensed under MIT and BillionMail under AGPL-3.0. Neither carries a licence fee.
What is the difference between claude-seo and BillionMail?
claude-seo is written in Python 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, claude-seo or BillionMail?
Choose claude-seo if you want the larger community (25,931 stars) or its MIT licence terms. Choose BillionMail if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.