Multi-part filaments for additive manufacturing comprise an elongate filament body. The elongate filament body comprises a first body part extending longitudinally along the elongate filament body, and a second body part extending longitudinally along the elongate filament body. The first body part comprises a first material, and the second body part comprises a second material. One of the first body part and the second body part is more rigid than the other of the first body part and the second body part and is sufficiently rigid to print self-supporting structures from the multi-part filament.