Keila is a German open-source newsletter tool (AGPLv3) designed for companies needing privacy-friendly email marketing. It provides an interface for creating, sending and tracking email campaigns (visual editor, Markdown or plain-text), along with audience segmentation and analytics. Keila can be self-hosted or used via its managed service, with servers located in Germany and France to ensure EU data protection. The project emphasizes “Made in Germany” data sovereignty and GDPR compliance.