ChatGPT's US mobile app DAU share continues to fall in March, now below 40%
ChatGPT's daily active user share on US mobile apps has dropped below 40% for the first time.
Data from market intelligence firm Apptopia reveals a significant shift in the mobile AI chatbot landscape. ChatGPT's share of daily active users (DAU) on US mobile apps fell below 40% in March 2026, continuing a steady decline from its previous market dominance. This metric, tracked since the generative AI boom, highlights how user attention is fragmenting across a growing field of competitors.
The decline points to a maturing market where users are actively comparing and switching between services. Rivals like Google's Gemini, Anthropic's Claude, and various specialized AI apps are capturing market share by offering differentiated features, pricing models, or integration with other ecosystems. This competitive pressure challenges OpenAI to innovate beyond its first-mover advantage to retain its user base in an increasingly crowded space.
- ChatGPT's US mobile app DAU share dropped below 40% in March 2026, per Apptopia data.
- The trend indicates a sustained decline from ChatGPT's peak market dominance.
- The shift reflects growing competition from alternatives like Gemini and Claude as the AI chatbot market expands.
Why It Matters
For professionals, this signals a diversifying AI tool landscape where no single provider holds a monopoly on user attention or innovation.