BillionMail gives you open-source mail server, newsletter, email marketing — fully self-hosted, dev-friendly, and free from monthly fees.
Cost / License
- Free
- Open Source (AGPL-3.0)
Platforms
- Self-Hosted
- Docker
Hong Kong SAR China

Browse 1,463 Docker Software on AlternativeTo including popular Docker options.
BillionMail gives you open-source mail server, newsletter, email marketing — fully self-hosted, dev-friendly, and free from monthly fees.

Open-source, self-hosted platform for logs and OpenTelemetry traces, with full-text search running on S3-compatible object storage.



The framework is completely customizable with a full featured set of API and flexible classes. RadaeePDF Master SDK allows you to read, annotate, manipulate, do text searches and extractions, and much more besides.
A lightweight network configuration backup and visual drift detection tool built for MSPs, featuring native integrations with Hudu and Syncro.


Sirius is a GPU-native SQL engine. It plugs into existing databases such as DuckDB via the standard Substrait query format, requiring no query rewrites or major system changes.

HermitMQ is a highly performant, lightweight message broker written entirely in Go. It was built for developers who need fast message queuing without the massive runtime overhead and operational complexity of heavy enterprise solutions.

LiMon is a self-hosted appliance that tracks usage across FlexLM, RLM, LM-X, and DSLS license servers. Installs via Docker, DEB, or RPM in about 15 minutes. Runs fully air-gapped. No agents , no cloud, no phone-home




WireQuery is a full-stack session replay tool. Using WireQuery, you can see how a user experiences an issue through a video-like frontend recording.
Graphically design industrial dashboards, then run them on Windows, Linux, Docker or Raspberry Pi and operate them from modern web browsers.




A Docker-first equipment rental management system built in Go, featuring inventory tracking, job & customer management, analytics, and secure role-based access.




Open source data dashboards and customer-facing analytics you can embed into your product with full control over your data.

Jellycorrd — a small Discord bot that lets you request movies/TV via Jellyseerr and receives Jellyfin "item added" notifications in Discord.








The searchmysite.net search engine is a niche search, focussing on the "indieweb" or "small web" or "digital gardens", i.e. non-commercial content, primarily personal and independent websites.


Fully autonomous AI hacker to find actual exploits in your web apps. Shannon has achieved a 96.15% success rate on the hint-free, source-aware XBOW Benchmark.

Web interface for viewing and managing database connections — PostgreSQL, MySQL, MongoDB, Redis, Kafka and more. Designed for Kubernetes/Docker deployment.

An open-source, self-hosted expense tracking and bill-splitting application designed for privacy, flexibility, and financial transparency.




A zero-knowledge encrypted sharing utility for secure notes, one-time self-destructing secrets (EnvShare alternative), and a cross-device synced private notepad.


Endurain is a self-hosted fitness tracking service designed to give users full control over their data and hosting environment. It's similar to Strava but focused on privacy and customization.



Lightweight CRM for effortlessly managing contacts, sales pipelines, and customer interactions on your own infrastructure.

Picodata is a distributed, PostgreSQL-compatible database with a plugin model in Rust; plugins add Redis and Cassandra CQL wire protocol support.

CubeBackup is a self-hosted backup solution for Google Workspace data. It can automatically and incrementally back up Google Workspace data for all users in your domain. It supports backup for Google Drive, Shared Drives, Gmail, Google Contacts, Google Calendar, and Google...


