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Two new AI personal assistant products launched this week positioning themselves around privacy: Sigil Wen's Underdog, described as a free, fully private, on-device assistant, and Hark's AI assistant, both aiming to compete with existing offerings like Muse, Dots, and Instinct. The launches reflect growing competition in the consumer AI assistant space, with privacy and on-device processing emerging as key differentiators against cloud-based rivals from larger tech companies.