Aleksi Rantamaa, widely known on social media as Mentaalisavuke, is a Finnish content creator and media personality who started YouTubing in the early 2010s. He is often referred to as one of the first Finnish YouTube influencers.

He transitioned from blogging to making videos and has since built a diverse career in content production, podcasts, and media collaborations. Years of work with Yle have enabled him numerous different media projects aimed at young people.

On social media, Aleksi describes himself as a "full-time clout demon and media industry jack-of-all-trades." He is also one of the hosts of the popular Isoi Juttui podcast.

Aleksi aims to create content that combines depth and entertainment: he addresses current phenomena, internet culture, and the world of young people, often with a personal and straightforward style.