listmonk is a standalone, self-hosted, newsletter and mailing list manager.
It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL (⩾ v9.4) database as its data store.
This is free and open source software.
Key Features
- Manage millions of subscribers across many single and double opt-in lists with custom JSON attributes for each subscriber.
- Query and segment subscribers with SQL expressions.
- Use the fast bulk importer (~10k records per second) or use HTTP/JSON APIs or interact with the simple table schema to integrate external CRMs and subscriber databases.
- Simple API to send arbitrary transactional messages to subscribers using pre-defined templates. Send messages as e-mail, SMS, Whatsapp messages or any medium via Messenger interfaces.
- Simple analytics and visualizations. Connect external visualization programs to the database easily with the simple table structure.
- Create powerful, dynamic e-mail templates with the Go templating language. Use template expressions, logic, and 100+ functions in subject lines and content. Write HTML e-mails in a WYSIWYG editor, Markdown, raw syntax-highlighted HTML, or just plain text.
- Multi-threaded, high-throughput, multi-SMTP e-mail queues. Throughput and sliding window rate limiting for fine grained control. Single binary application with nominal CPU and memory footprint that runs everywhere. The only dependency is a Postgres (⩾ v9.4) database.
Website: listmonk.app
Support: GitHub Code Repository
Developer: Kailash Nadh
License: GNU Affero General Public License v3.0
listmonk is written in Go and JavaScript. Learn Go with our recommended free books and free tutorials. Learn JavaScript with our recommended free books and free tutorials.

Related Software
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| Gray Duck Mail | Modern group email discussion lists |
Read our verdict in the software roundup.
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