Absolit Consulting maintains a list of German email marketing agencies and their relationships to the most common email service providers (see also the ESP worldmap). Please find it in the two articles More Success with Specialized Email Agencies and Specialized Email Agencies Part 2. Both are in German.
The list would fit well into the agency-branch of the email marketing ecosystem. However, to make the visualization not more confusing than it already is, here’s a separate infographic, mapping the relationships between German email agencies and their supported ESPs: Continue reading