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The decarbonization of the energy sector sees an increase in fluctuating and non-programmable energy sources (wind and solar) and requires solutions to balance fluctuations that these may cause to electricity grids. On the other hand, geothermal is known for its reliability over time and the GeoSmart project (2019-2024, www.geosmartproject.eu) was aimed at demonstrating and optimizing innovative solutions to increase the flexibility of plants. These technologies were tested in two different sites: Kizildere II (Türkiye), which uses higher temperature and adopts the triple flash technology, and Insheim (Germany), an ORC plant using lower temperature resources. The project also investigated the opportunity to hybridize geothermal with other renewable energy sources to improve efficiency and flexibility. Geothermal resources can vary within a few kilometres and technologies should adapt to local conditions, making it challenging to standardize solutions. Case by case in-depth technical and economic analysis on feasibility is necessary to provide as many guarantees as possible to investors at their convenience. This work reports the main strengths and gaps identified for the replicability and market uptake of 1) silica retention system to decrease reinjection temperatures and prevent scaling, and high-temperature phase change material (PCM) energy storage, 2) low-temperature thermocline thermal energy storage with flexible ORC, and 3) geothermal flash plants hybridized with waste biomass and Parabolic Trough Collector (PTC). Geothermal flow assurance simulations have been performed, and an Open Access online simulation tool has been developed to further showcase these technologies in different operational environments and scenarios.The GeoSmart project demonstrated solutions for flexible geothermal operation, but it is necessary to find solutions to improve the replication potential of these technologies, lower capital and operational costs and increase the technological maturity, particularly in the case of hybridization of geothermal power plants with CST (Concentrated Solar Thermal) and biomass. These gaps should be first overcome by continuing to support research and innovation for flexible geothermal solutions. This might concern support to further demonstrations in storage systems, to combine heat and power production in contexts with high temperatures and different plant layouts. In this framework, further research in geothermal hybrid solutions should also be supported, to increase their TRL (Technology Readiness Level) and be commercialized. Policies and measures to promote investments in renewable energy flexible solutions, as reported above, would result in their greater deployment, a decrease in equipment costs and more trust of investors in the long term.