R
B
M
SWhat it is
BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXz GitHub popularity snapshot captured on 2026-07-16: 15,323 stars and 1,661 forks.
Teams can evaluate BillionMail as an open alternative to Resend while keeping the implementation, license, and repository signals visible. Confirm the official documentation against your exact workflow before treating it as a production dependency.
- Categories
Data & Analytics
Self-hosted- Built with
Go
JavaScript
NodeJS
CSS
Bash
Typescript
Who it’s for — and when to skip it
Data teams
Use it when you need transparent storage, processing, querying, or reporting behavior.
Skip if your required connectors or governance controls are not documented.
Backend engineers
Consider it when the data model and APIs can remain portable across your infrastructure.
Skip if migration and backup procedures are unclear.
Analytics owners
Evaluate it when access to queries and source code is more valuable than a closed dashboard workflow.
Skip if nontechnical operators require a fully managed support model.
Strengths and trade-offs
Why teams consider it
server
smtp
Source code and AGPL-3.0 license are visible before adoption
Repository activity is available as a current maintenance signal
What to validate
Self-hosting transfers upgrades, backups, monitoring, and incident response to your team
GitHub popularity is not a security, quality, or product-fit guarantee
The AGPL-3.0 license still needs review against your distribution and commercial model
Support quality, migration effort, and production hardening vary by project
Pricing
Free and open source
No commercial plan is documented in this catalog entry. Self-hosting or third-party infrastructure may still incur operating costs.
Open source
$0Project license- Source available under the listed license
- No catalog-documented paid edition
- Infrastructure costs depend on how you run it
Capabilities and stack fit
Catalog metadata supports discovery, not installation. Verify supported versions, dependencies, deployment topology, and production requirements in the official repository.
Guides for BillionMail
Use the learning library to find a guide by technology, category, or difficulty.
Browse guidesApproved community reviews
We do not display synthetic testimonials or ratings without sufficient moderated data.
Before you adopt it
- 01
Read the license and confirm it fits your intended use and distribution model.
- 02
Review recent commits, open issues, releases, and the maintainer response pattern.
- 03
Run a small proof of concept with representative data, users, and integrations.
- 04
Plan backups, upgrades, secrets, monitoring, and rollback before self-hosting.
- 05
Document an export or migration path before storing critical data.
