Open-source Marketing Automation tools

The best open-source Marketing Automation tools, curated: 5 in the registry, including Billion Mail, Dittofeed, Plunk. Every tool is open-source; each entry lists license, self-hostability, and links.

5 tools · ← all categories · JSON

• Billion Mail — tool, 2026-09-03
  OSS alt to Mailchimp; ~15393 stars; via openalternative.co
• Dittofeed — tool, 2026-09-03
  OSS alt to Customer.io; ~2888 stars; via openalternative.co
• Plunk — tool, 2026-09-03
  OSS alt to Resend; ~5347 stars; via openalternative.co
• Sendune — tool, 2026-09-03
  OSS alt to Resend; ~2182 stars; via openalternative.co
• useSend — tool, 2026-09-03
  OSS alt to Resend; ~4586 stars; via openalternative.co