Colossus — Self-Hosted Email Marketing

Colossus — Self-Hosted Email Marketing

Colossus is a self-hosted email marketing solution built with Django and Python. It provides a full newsletter and campaign management workflow — subscriber import and management, HTML/text campaign authoring, list segmentation, automated open and click tracking, unsubscribe handling, and per-campaign analytics — all under the MIT license with no per-email fees.

Key Features

• Subscriber management: import CSV, double opt-in, unsubscribe workflows
• Campaign builder: HTML editor + plain-text fallback
• Segment subscribers by tag or custom attribute for targeted campaigns
• Open and click tracking with campaign-level analytics
• SMTP relay support (SendGrid, Mailgun, SES, self-hosted Postfix)
• Django admin for full database management

Quick Start

git clone https://github.com/vitorfs/colossus
cd colossus
pip install -r requirements.txt
python manage.py migrate
python manage.py createsuperuser
python manage.py runserver

Open http://localhost:8000/accounts/login/ and log in to create your first email list and campaign.

npx ai-supply add colossus-email-marketing

Curated mirror of the open-source Colossus (MIT). Get it from the source.