Nature Materials, Published online: 23 February 2026; doi:10.1038/s41563-026-02518-5We discuss altermagnetic multiferroics, materials hosting distinct advantages for low-power spintronic devices, including a zero net magnetization that eliminates stray fields, a momentum-dependent spin splitting enabling controllable spin currents and an intrinsic strong magnetoelectric coupling originating from the spin space symmetry.