Cognitive-Behavioral Therapy for insomnia (CBTi) is a well-established therapeutic intervention for insomnia. SleepUp provides a digital therapeutics platform based on CBTi and additional features. This clinical trial aims at analyzing the efficacy of the CBTi-based platform offered by SleepUp in reducing symptoms of insomnia. The sample will be composed of 160 individuals, both males and females, from 20 to 60 years old, with insomnia symptoms considered as at least mild. Those who accept to participate will be randomized and distributed in four groups: * Standard CBTi (CBTi-S): This treatment consists of an eight-week treatment composed by weekly and structure appointments with board-certified sleep psychologists. The appointments will be made remotely (video calls with psychologists). * Minimal intervention - Sleep hygiene (MI-SH): This group will receive an educational program on sleep hygiene through the SleepUp app. Its content covers topics that are also covered in the online CBTi sessions. This procedure is more adequate as a control than the commonly used no treatment or waiting list controls, due to the behavioral * Online CBTI (CBTI-O): This group will receive access to an eight-weeks CBTi-based treatment through the SleepUp app. The participants of this group will receive interventions equivalent to the standard in-person CBTi, but provided through a digital platform. * Online CBTi + additional features (CBTi-O+): This group will have access to the complete premium version of SleepUp platform. It includes those presented in the CBTi-O group and other therapeutic and complementary features (including meditation audios and videos, mindfulness therapy, relaxation soundtracks, sleep hygiene tips, virtual assistant, and telehealth. All participants in all groups will be assessed periodically throughout the eight weeks of intervention with standard sleep questionnaires and sleep logs. Additionally, follow ups will be made at two, four and six months after the end of the intervention. Equivalent intervals will be applied to the MI-SH group.