The Kriegsmarine did not have many special designed escort
vessels. Unlike the allied navys. Although some new designs
were planed none of those were completed. Therefore the Kriegsmarine
used other classes of ships for escort vessels, mine hunters,
German Warships, 1815-1945: Major Surface Vessels.
German Warships, 1815-1945: U-boats and Mine Warfare Vessels.
German warships of the Second World War.
For a complete list of sources