Ex-Google X trio builds AI "second brain" — $6M seed proves the concept

TwinMind captures ambient speech all day to build your personal knowledge graph. Think Otter, but running 24/7 in your pocket.

• 30,000+ users, 15,000 monthly active
• 16-17 hours continuous audio capture without battery drain
• $60M post-money valuation (Sequoia + Streamlined Ventures)
• 5.26% word error rate on new Ear-3 model
• Works offline, processes on-device for privacy

Founders spent 6-7 months perfecting iOS background audio capture — a technical moat most competitors can't replicate.

The insight: AI chatbots are reactive. TwinMind is proactive, learning from everything you say to generate contextual notes and answers.

Why it matters: Personal AI that knows your context beats generic chatbots.

https://techcrunch.com/2025/09/10/ex-google-x-trio-wants-their-ai-to-be-your-second-brain-and-they-just-raised-6m-to-make-it-happen/

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