Seiler is a German piano manufacturer founded in 1849 by Eduard Seiler in Liegnitz, Silesia. After post-war disruption that pushed operations through Denmark, the company settled in Kitzingen, Bavaria in 1961, where its premium grand and upright pianos are still built. Seiler is acknowledged in the piano world for its German craftsmanship tradition and proprietary technologies such as the Super Magnet Repetition (SMR) action and Membrator soundboard system.

The company produces instruments across three tiers: the flagship Seiler line built in Germany, the mid-level Eduard Seiler line, and the entry-level Johannes Seiler line, with the latter two manufactured in Indonesia under parent company Samick following its 2008 acquisition. Models span small uprights through full-size concert grands, including the Seiler 132 Konzert upright and the Seiler 278 concert grand.

Seiler instruments are exported to dozens of countries and are commonly found in conservatories, recital halls, and private studios. The brand sits in the German premium piano tier alongside makers such as Steinway, Bechstein, and Bösendorfer, while the Eduard and Johannes sub-lines extend the name into more accessible price points.

Seiler has 2 products cataloged on Equipboard, including Grand Pianos and Upright Pianos. Their gear is featured by 3 artists, with the strongest followings in Pop, Electronic, and Stage & Screen. Notable users include Stimming, Kurt Schneider, and Shiori Kubo.