Senlo
MVPOpen-Source Email Infrastructure

Build and automate your email communication

Senlo is a free, self-hosted platform combining a powerful visual email builder with robust campaign management and transactional API. Control your data, your templates, and your delivery.

Self-hosted
Private
Open Source

Visual Email Design
Without Compromise

Our procedural email editor uses a row-column-block architecture that ensures your designs look perfect on every device. Everything is nondestructive and stored in a predictable JSON format.

  • Drag-and-drop layout builder
  • MJML-powered responsive rendering
  • Custom merge tags for personalization
  • Real-time live preview
Senlo Editor

Complete Email Toolbox

Senlo is not just an editor. It is a full-stack engine for your communication needs.

Email Campaigns

Create segments, manage recipient lists, and schedule bulk broadcasts. Keep your audience engaged with personalized announcements.

Transactional API

Trigger order confirmations, password resets, and notifications directly from your backend using our simple REST API.

Deep Analytics

Track opens, clicks, and bounces in real-time. Gain insights into how users interact with your messages with detailed event logs.

Ready to own your
email infrastructure?

Join the open-source movement. Deploy Senlo in minutes and start sending emails without vendor lock-in.