The purpose of this study was to compare online gambling and associated harms across two cohorts of adults who sought help from the Swedish National Gambling Helpline. The first cohort was recruited in 2019 and included 185 adults. The second cohort was recruited in 2023 and included 122 participants. Both cohorts completed an online survey. Participants in the 2023 cohort reported more intense gambling than those in the 2019 cohort. Online electronic gambling machines (EGMs) were the most common form of gambling. Many participants in both cohorts experienced gambling-related harms and co-occurring mental health issues, such as depression, with increases in the 2023 cohort. People who gambled on online EGMs were more likely to experience harms.