Niki Rotor Aviation is a Bulgarian aircraft manufacturer based in Pravets.

The company specializes in the design and manufacture of autogyros in the form of kits for amateur construction.

[1] The company is noted for its elegant, enclosed cockpit designs and its use of US-made Vortech and Sport Copter rotor blades.

[1] The Niki 2004 model was developed into the stretched Niki 2004M and later into the faster Niki 2008 and Niki Apis.

[1] The Niki Lightning, originally designated as the Niki 2009, and Niki Kallithea are tandem two seat models, the Kallithea with a low-mounted tailboom under the propeller and the Lightning with a propeller-hub mounted tailboom.