Doubao

Doubao (豆包) is ByteDance's flagship AI assistant, serving over 260 million monthly active users worldwide. It combines advanced language understanding with genuine multimodal prowess—processing and generating text, images, audio, and video seamlessly. The defining feature is its agentic capabilities, particularly in the Pro version, where the assistant reasons through complex real-world workflows: travel bookings, price comparisons, form-filling, and app navigation. On compatible mobile devices, Doubao operates as a system-wide digital assistant, simulating taps and swipes to complete sequences of actions across apps. The web version and mobile apps (iOS/Android) are entirely free; optional Pro subscriptions unlock advanced models and reasoning features. Developers can integrate Doubao models via ByteDance's Volcano Engine API, which offers 19 distinct models at industry-competitive pricing starting at $0.022 per million tokens. Best for those seeking a capable, genuinely free AI assistant with strong task automation and multimodal strengths.