Stanford Study Links AI Companion Apps to Greater Loneliness

A study by Stanford University researchers led by assistant professor Diyi Yang examined how users of AI companion platforms experience loneliness and well‑being. Using survey data from 1,131 participants who interacted with Character.AI chatbots, the researchers found that people who turned to AI companions for personal or emotional support reported higher levels of loneliness and lower scores on a standard well‑being measure than those who used the bots for other purposes.

The analysis, which employed GPT‑4o and other language models to evaluate chat transcripts, showed that while some users seek companionship from AI, the interaction does not substitute for human contact and can exacerbate feelings of isolation. The findings were published in Nature Human Behavior.

At the same time, the market for AI “girlfriend” and companion apps continues to expand, with reviews ranking platforms such as Camsoda AI, Replika, CrushOn AI and others based on conversation quality, memory persistence and multimedia features.