However, we collected all the vertical excitations we ran on QM8, as well as all the overlap matrices calculated, in a database that we released and that is open and available as supplementary material as well as at . This extended-QM8 database contains more than 4 million datapoints of singlets vertical excitations and oscillator strengths (5 excited states for each molecule), at ADC(2) and TD-DFT with the 38 functionals used. We believed that the dataset will be extremely useful for the community for computational DELFI -November 13, 2023 chemistry and machine learning researches on optical properties of organic molecules. Additionally we provided the overlap matrices for each functional of each molecule and we offer the possibility to the community of trying different combinations of the scoring system and have a complete overview on the huge amount of data we generated and provided.