The main aim of this research was to study and compare the microstructure and mechanical properties of AISI H11 hot work tool steel samples produced by wire laser-based DED technology (DED-LB/M) with respect to the conventional material. Material properties of Material properties of metal Additive Manufacturing (AM) materials differ significantly from those produced by conventional methods due to the numerous AM phenomena, like thermal gradients, high cooling rates or complex parameters could successfully result in materials with outstanding properties. Dense samples were achieved by the process parameters developed with a material densification up to 99.89% and 99.75%, in the horizontal and vertical directions, respectively. Microstructural analysis and hardness measurements were also carried out. Horizontal and vertical samples were manufactured from the as-built H11 material obtained by DED wire to machine cylindrical tensile samples according to ISO 6892 standard. Tensile specimens were also machined from conventional AISI H11 material before and after performing the conventional heat treatment for AISI H11. Results for the conventional material indicated tensile strength of 718 MPa and 1435 MPa, before and after heat treatment, respectively. Whereas for the material developed by additive manufacturing in as-built condition, tensile strength values of 1778 MPa and 925 MPa in horizontal and vertical directions, respectively, were obtained. These promising properties could lead to an innovative method for processing the AISI H11 tool steel by wire DED-LB/M in one single step without the need for heat treatment and leading to properties even higher compared to the heat-treated conventional material. This could potentially save costs and time on the overall production of industrial components.