head to head · open source
Billion Mail vs ClickStack
Billion Mail has 16,207 GitHub stars, 1,809 forks, 236 open issues and last shipped 5 months ago. ClickStack has 9,997 stars, 517 forks, 270 open issues and last shipped yesterday. Billion Mail leads on adoption by 62% (16,207 vs 9,997 stars). Billion Mail is written in Go under AGPL-3.0; ClickStack is written in TypeScript under MIT. Billion Mail has attracted 11% as many forks as stars, ClickStack 5%. ClickStack 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
| Billion Mail | ClickStack | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 10.0K |
| License | AGPL-3.0 | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-06-11 | 2026-11-07 |
| Forks | ⑂ 1.8K | ⑂ 517 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Billion Mail if
- You weight community size — 16K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick ClickStack if
- You want the ClickStack feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and ClickStack fits your workflow better
About Billion Mail
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 Billion Mail overview →
About ClickStack
ClickStack ClickStack (formerly HyperDX) helps engineers quickly figure out why production is broken by making it easy to search & visualize logs and traces on top of any ClickHouse cluster (imagine Kibana, for ClickHouse). Documentation • Chat on Discord • Live Demo • Bug Reports • Contributing • Website 🕵️ Correlate/search logs, metrics, session replays and traces all in one place 📝 Schema agnostic, works on top of your existing ClickHouse schema 🔥 Blazing fast searches & visualizations optimized for ClickHouse 🔍 Intuitive full text search and property search syntax (ex. level:err ), SQL optional! 📊…
read the full ClickStack overview →
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Frequently asked questions
Is Billion Mail or ClickStack more popular?
Billion Mail has 16,207 GitHub stars and ClickStack has 9,997. Billion Mail has the larger community by that measure.
Are Billion Mail and ClickStack free?
Both are open source. Billion Mail is licensed under AGPL-3.0 and ClickStack under MIT. Neither carries a licence fee.
What is the difference between Billion Mail and ClickStack?
Billion Mail is written in Go and ClickStack in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Billion Mail or ClickStack?
Choose Billion Mail if you want the larger community (16,207 stars) or its AGPL-3.0 licence terms. Choose ClickStack if its feature set, stack or MIT licence fits better. Both are self-hostable.