A person with borderline personality disorder (BPD) can live a normal life if they receive appropriate therapy. Dialectical behavior therapy is one of the most effective treatments for reducing BPD criteria in a person. Individuals with BPD are typically aged 18–40 years and are comfortable with the internet. Therefore, Dialectical Behavior Therapy can be performed via a chatbot (DBTC). This study aims to this study aims to create a chatbot application for BPD clients. The hypothesis is that DBTC is useful in lowering Borderline Personality Disorder (BPD) scores. This research is divided into two stages. The first stage is to distribute the BPD scale to 56 individuals. Eleven participants with high BPD scale scores (above 80) were chosen to participate in the focus group discussion (FGD). The pretest-posttest design is used in the second stage of this study. Three participants with high BPD scale scores were invited to attempt to ask SoviLau questions regarding everyday difficulties. The next stage is to build a chatbot as a virtual assistant using the SoviLau app. The findings showed that DBTC could reduce BPD symptoms, notably impulsivity, affective instability, inappropriate behavior, and unstable patterns of interpersonal relationships.