Weltmeister is a German accordion manufacturer based in Klingenthal, Saxony, with roots tracing back to 1852. The brand was produced for decades by VEB Klingenthaler Harmonikawerke, a state-owned East German enterprise formed in 1949 through the consolidation of several private Klingenthal workshops. Following German reunification, production continued under HARMONA Akkordeon GmbH, and the instruments are still handcrafted in Klingenthal under the Weltmeister Akkordeon Manufaktur name.

The company is best known for its piano and chromatic button accordions, ranging from student models to professional concert instruments. Notable lines include the Saphir, Achat, Rubin, Juwel, Supita, and Romance piano accordions, along with diatonic button models such as the 509 and 571. Weltmeister accordions have historically been exported to dozens of countries and are valued for their hand-built reeds, traditional craftsmanship, and the broad tonal palette characteristic of the Klingenthal accordion-making tradition.

Weltmeister has 8 products cataloged on Equipboard, including Accordions, Vintage & Electric Pianos, and Portable & Arranger Keyboards. Their gear is featured by 6 artists, with the strongest followings in Rock, Electronic, and Pop. Notable users include Guy Sigsworth, Jeff Fatt, and Kid Koala.