MagNEO's objective is robust and sustainable REE-free permanent magnets (PM) for emergent energy & mobility applications. The concept hinges upon novel compositions of AlNiCo & HEAs undergoing similar spinodal decompositions, processed by additive manufacturing (AM). The recycling strategies developed will allow environmentally friendly repurposing of disparate metallic constituents, with emphasis on Co recovery. The targeted properties of the new PMs are (BH)max 60 kJ/m3 for Co 24% and (BH)max 72 kJ/m^3 for Co35%. MagNEO will be realised through the following strategies: 1) open-source modelling tools, machine learning guided high-throughput digital & experimental screening to accelerate the development of novel environmentally benign materials, with compositions suitable for AM, throughout multicomponent alloy phase spaces, 2) harness the competitive advantages conferred by AM, such as shape complexities and microstructure engineering, in tandem with comprehensive heat treatment. These will be crafting novel anisotropic microstructures characterized by higher coercivity, culminating in (BH)max values exceeding 60 kJ/m^3. The performance of the new PMs will be verified for a) low-speed PM generators in wind turbines & ship propulsion shafts, (b) high speed (>100 m/s) rotors in heat pumps and (c) ABS sensors & headlight systems in automotive. The upscaling process will be conducted through techno-economic analyses performed by the manufactures in synergy with the end-users. This procedure will begin with a proof of concept at TRL3-4 and will culminate with technology validation at TRL6. MagNEO stands out as a fusion between accomplished multidisciplinary experts who will contribute to training and joint actions with other European teams to increase the competitiveness and sustainability of European industry by bringing innovative materials and new methods closer to the market, while maintaining cost-effectiveness of REE-free products in consideration.