Silicon Valley’s AI wunderkind launches Underdog, the most private Instinct/Muse competitor yet

Sigil Wen, backed by prominent Silicon Valley investors, has launched Underdog, an AI assistant designed to run on-device. The product promises to be free, privacy-focused, and capable of handling everyday tasks without relying heavily on cloud processing.

Underdog reflects the growing push toward private AI as users and regulators scrutinize how assistants handle personal data. If it delivers strong everyday utility while staying local and free, it could pressure rivals to improve privacy guarantees and rethink cloud-dependent business models.