MailMergic GmbH is a German software company that builds document automation infrastructure for teams that work out of spreadsheets. Founded in 2019 as PDF Mail Merger and rebranded to MailMergic in 2024, it is headquartered in Eschborn near Frankfurt, and businesses of every size, from early startups to public companies, use its software to automate document workflows. The product turns a PDF, Word, or Excel template plus an Excel or Google Sheets list into one personalized document per row, then emails each one to the right recipient. A public API and Zapier integration connect it to existing systems. MailMergic runs on EU infrastructure and is fully GDPR compliant, and an offline desktop app covers organizations whose data can never leave their own machines.