head to head · open source
Billion Mail vs perspective
Billion Mail has 16,171 GitHub stars, 1,801 forks, 236 open issues and last shipped 5 months ago. perspective has 11,386 stars, 1,355 forks, 39 open issues and last shipped 7 days ago. Billion Mail leads on adoption by 42% (16,171 vs 11,386 stars). Billion Mail is written in Go under AGPL-3.0; perspective is written in Rust under Apache-2.0. Billion Mail has attracted 11% as many forks as stars, perspective 12%. perspective 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 | perspective | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 11K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Go | Rust |
| Last push | 2026-06-11 | 2026-10-27 |
| Forks | ⑂ 1.8K | ⑂ 1.4K |
| 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 perspective if
- You want the perspective feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and perspective 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 perspective
Perspective is an interactive analytics and data visualization component for large, real time and streaming datasets. Build user configurable reports, dashboards, notebooks and applications, backed by a high performance streaming query engine that runs in browser via WebAssembly or server side in Python, Node.js and Rust — or delegates to a database you already have. Features A data reactive UI packaged as a Custom Element, with drag and drop query and layout configuration. Includes a virtual scrolling, editable data grid, WebGL charting engine with 15+ chart types, tile based geographic maps, full theme…
read the full perspective overview →
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Frequently asked questions
Is Billion Mail or perspective more popular?
Billion Mail has 16,171 GitHub stars and perspective has 11,386. Billion Mail has the larger community by that measure.
Are Billion Mail and perspective free?
Both are open source. Billion Mail is licensed under AGPL-3.0 and perspective under Apache-2.0. Neither carries a licence fee.
What is the difference between Billion Mail and perspective?
Billion Mail is written in Go and perspective in Rust. 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 perspective?
Choose Billion Mail if you want the larger community (16,171 stars) or its AGPL-3.0 licence terms. Choose perspective if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.