Background: The COVID-19 pandemic has increased worldwide mental health conditions, substantially affecting the demand and provision of mental health services. To continue services and safeguard the health and well-being of mental health service users, service providers have responded to the pandemic with the adoption of remote services. The objective of our study was to identify and compare the promoters and challenges of the adoption of remote mental health services experienced by service users in Finland and the Netherlands during the COVID-19 pandemic with help of the FITTE framework. Methods: The study adopted a qualitative descriptive approach, consisting of in-depth semi-structured interviews with mental health service users in Finland (n = 12) and the Netherlands (n = 13) during the COVID-19 pandemic. Qualitative content analysis with both inductive and deductive approach was utilized, and the extended FITTE framework was applied to identify the factors related to the fit between individual, task, technology, and environment that influenced the adoption of remote services. Results: Overall, the adoption of remote mental health services during the COVID-19 pandemic involved several promoters related to easy access to mental health services, support for mental health and well-being, and benefits of the home environment such as not having to leave outside for services and having less risk of getting the corona virus. Most of the challenges were related to lack of non-verbal communication, difficulties with expressing oneself and interpreting others, technological issues, the organization of remote services, usability and suitability of services, affinity of the health professional with the provision of remote services, and the safety and security of remote services. Conclusions: While remote services are accessible, support our well-being and mental health and protect us against the coronavirus, our findings also show that face-to-face contact was often indispensable when adopting mental health services. ...