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Bright and close-by G-to-M type stars are preferential targets in radial velocity surveys to find Earth analogs. Their brightness allows us to achieve the best precision on RV measurements and search for signals with amplitudes of less than 1 m s<jats:sup>\u22121<\/jats:sup>.<\/jats:p>\n<jats:p><jats:italic>Aims.<\/jats:italic> We present an analysis of the RV data of the star HD 20794, a target whose planetary system has been extensively debated in the literature. The broad time span of the observations makes it possible to find planets with signal semi-amplitudes below 1 m s<jats:sup>\u22121<\/jats:sup> in the habitable zone.<\/jats:p>\n<jats:p><jats:italic>Methods.<\/jats:italic> We analyzed RV datasets spanning more than 20 years. We monitored the system with ESPRESSO. We joined ESPRESSO data with the HARPS data, including archival data and new measurements from a recent program. We applied the post-processing pipeline YARARA to HARPS data to correct systematics, improve the quality of RV measurements, and mitigate the impact of stellar activity.<\/jats:p>\n<jats:p><jats:italic>Results.<\/jats:italic> We confirm the presence of three planets, with periods of 18.3142 \u00b1 0.0022 d, 89.68 \u00b1 0.10 d, and 647.6<jats:sub>\u22122.7<\/jats:sub><jats:sup>+2.5<\/jats:sup> d, along with masses of 2.15 \u00b1 0.17 M\u2295, 2.98 \u00b1 0.29 M\u2295, and 5.82 \u00b1 0.57 M\u2295 respectively. For the outer planet, we find an eccentricity of 0.45<jats:sub>\u22120.11<\/jats:sub><jats:sup>+0.10<\/jats:sup>, whereas the inner planets are compatible with circular orbits. The latter is likely to be a rocky planet in the habitable zone of HD 20794. From the analysis of activity indicators, we find evidence of a magnetic cycle with a period of ~3000 d, along with evidence pointing to a rotation period of ~39 d.<\/jats:p>\n<jats:p><jats:italic>Conclusions.<\/jats:italic> We have determined the presence of a system of three planets orbiting the solar-type star HD 20794. 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