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Last Updated: 07-11-2026 06:00 PM (UTC)

Keila

Among open-source Mailchimp alternatives, Keila has the most modern UI - built in Germany on Elixir and Phoenix (the PETAL stack), with GDPR-conscious defaults including an optional no-tracking mode, and 100% open source with no proprietary premium tier. Campaign authoring is flexible three ways: a visual block editor with multi-column layouts, Markdown with or without WYSIWYG for hybrid HTML-plus-plain- text sends, and raw MJML for hand-coded designs. The personalization system is unusually clean - every contact carries custom data as a single JSON object (populated from sign-up form fields or pushed from your CMS/CRM), and Shopify's Liquid template language renders it into fully dynamic emails. Targeting uses a visual segment editor backed by a powerful segment language for complex logic over tags, language preferences, and any custom field. Sign-up forms with custom fields grow your lists; open and click tracking measures campaigns; scheduled sending handles timing. Delivery pipes through your own SMTP or first-class integrations with AWS SES (including automated bounce handling), SendGrid, Mailgun, and Postmark. A full REST API manages contacts, campaigns, and segments, with Erlang/OTP reliability underneath. Comfortable at 100K+ subscribers. AGPL-licensed, EU-hosted project, actively developed.

Keila
Keila
Keila
Keila
Keila

Benefits

  • Mailchimp UX Without Mailchimp
  • The most modern interface of the open-source newsletter tools, with zero proprietary features.
  • Subscriber Data Stays Yours
  • GDPR-conscious defaults, optional no-tracking mode, and every contact record on your server.
  • Personalization That Scales
  • JSON custom data per contact rendered through Liquid templates for fully dynamic emails.
  • Deliverability Your Way
  • Send via SMTP or AWS SES, SendGrid, Mailgun, and Postmark - with automated SES bounce handling.

Features

  • Three Editors
  • Visual block editor, Markdown with WYSIWYG, and raw MJML for hand-coded designs.
  • Liquid Templating
  • Shopify's template language over per-contact JSON data for dynamic content.
  • Visual Segmentation
  • Point-and-click segment editor plus a powerful language for complex targeting.
  • Sign-Up Forms
  • Embeddable forms with custom fields feeding contact data directly.
  • Campaign Analytics
  • Open and click tracking with scheduled sending.
  • REST API
  • Programmatic control of contacts, campaigns, and segments.