Best Open Source Marketing Automation in 2026

Platforms for automating marketing workflows, lead nurturing, and multi-channel campaign management.

The most popular pick this year is Postiz with 30,278 GitHub stars, but all 4 options below are worth considering depending on your needs.

4 open source marketing automation — ranked by GitHub stars. Browse all

Postiz

📨 The ultimate social media scheduling tool, with a bunch of AI 🤖

Alternative to:

Buffer

Mautic

Open-source marketing automation platform with email campaigns, lead management, and multi-channel marketing.

Alternative to:

HubSpot

Dittofeed

Open-source customer engagement. Automate transactional and marketing messages across email, SMS, mobile push, WhatsApp, Slack, and more 📨

Alternative to:

customer.io

Chronex

Self-hostable social media scheduler for content creators and small teams with distributed job processing.

Alternative to:

Buffer

How we rank these tools

Tools are ranked by GitHub stars as a proxy for community adoption and trust. Stars reflect how many developers found a project valuable enough to bookmark — a reasonable signal for quality in the open source world. We only list tools that are actively maintained and open source.

Looking for tools you can run yourself? Browse self-hosted marketing automation →