✨ Founder story

How Three Ex-Google X Scientists Are Building Your AI Second Brain

Daniel George, Sunny Tang and Mahi Karim left Google X to fix what they call AI's biggest weakness — its inability to remember anything about you. After a $5.7M seed round at a $60M valuation and a speech model that beats the field, the desktop app is their latest wedge.

$5.7MSeed round, September 2025, led by Streamlined Ventures
$60MPost-money valuation at the seed raise
30,000Users reported at the seed raise
15,000Monthly active users at the seed raise
5.26%Ear-3 speech model word error rate (140+ languages)
16–17Hours of continuous background capture without draining battery

The third launch: your second brain moves to the desktop

TwinMind's third Product Hunt launch brings its AI "second brain" to the desktop — the product the company describes as "AI that understands your life and helps you proactively." The desktop app extends what the mobile app already does: it runs in the background, captures everything you say and hear in meetings, lectures and in-person conversations, then automatically transcribes, summarizes, proactively suggests tasks, and continuously builds context for the memory it keeps on you.

On its site, TwinMind frames the promise bluntly: "Never forget your ideas, conversations & meetings." The app transcribes and summarizes the day, organizes it into a second brain, and powers ChatGPT, Claude and Gemini with context from the user's life. The launch banner leans on the ambition — "Meeting Notes + Dictation in One App," "Augmenting 500,000+ human minds" — and on the press it has already collected: Forbes, TechCrunch, Business Insider and Fast Company have all covered the company.

The product differentiates itself from AI meeting note-takers like Otter, Granola and Fireflies on one axis: it doesn't join scheduled calls, it captures passively all day with the user's permission, building what the founders call a personal knowledge graph. Pricing starts free, with a $11.99/month Pro plan marked as most popular and a $29.99/month Max plan on top.

From a JPMorgan VP's meeting overload to a phone that quietly listens

Daniel George didn't start at a startup. An astrophysicist by training, he spent years at Google X working on moonshot projects — six of them, including the AI-powered earbuds team — before becoming VP and Applied AI Lead at JPMorgan in 2023. There, back-to-back meetings created the problem that became the product: he built a script that captured audio, transcribed it and fed the context into ChatGPT.

When colleagues on Blind saw the idea, they wanted it — but balked at running an always-listening tool on a work laptop. That reaction set the design: TwinMind became a personal phone app that could quietly listen during meetings without touching a corporate machine. George co-founded the company in March 2024 with two former Google X colleagues, Sunny Tang and Mahi Karim, who serve as co-CTOs.

The early days were spartan. George told Fast Company the three founders were living together in a Bay Area house, "working 100-hour weeks for the past year-and-a-half." The first check came from Stephen Wolfram — George's former research lab mentor — marking Wolfram's debut startup investment. Early angels included Rocketship VC founding partner Anand Rajaraman, Oracle chief AI scientist Dan Roth, and Michael Liou, an early investor in Robinhood and Zapier; the company had raised over $2.5 million at a $30 million valuation by 2024.

Seven months inside Apple's walled garden

The hard part was never the AI — it was the phone. Making continuous background audio capture work on iPhones required, in George's words to TechCrunch, "about six to seven months last year just perfecting this audio capture continuously and getting there to find a lot of hacks around Apple's walled garden."

The engineering choice was deliberate: a low-level audio service written in pure Swift, running natively, while competitors built on React Native and cloud-based processing — exactly what Apple restricts from running in the background for extended periods. The result is the product's headline spec: 16 to 17 hours of continuous capture without draining the battery, with real-time transcription happening on the device and an offline mode for when there's no connection.

The team then went one level deeper and built its own speech model. Ear-3, launched in September 2025, reported a 5.26% word error rate — beating the previous best from ElevenLabs (6.01%) — while supporting more than 140 languages, roughly 100 more than Otter and 40 more than OpenAI's Whisper, at what the company calls the cheapest cost in the field at $0.23 per hour of audio. The app also does real-time translation across more than 100 languages, and a Chrome extension extends capture to tabs, email, Slack and Notion.

The $5.7 million bet on the internet's memory layer

In September 2025 TwinMind closed a $5.7 million seed round led by Streamlined Ventures, with Sequoia Capital participating, valuing the company at $60 million post-money. At the raise, the company reported over 30,000 users with 15,000 monthly actives — 50 to 60% professionals, about 25% students, the rest personal users. The company says up to 30% of users adopt the browser extension.

George's own father is one of the more telling users: he uses TwinMind to dictate and write his autobiography. "Once people use it, they won't stop," George predicted to Fast Company. "I can't live without it." The company told Fast Company it was planning a Series A and speaking with VC firms for the first time as it scaled.

The thesis the round bought is bigger than note-taking. The founders like to compare the product to Jarvis — Tony Stark's AI in the Marvel films — an assistant that is constantly learning what the user is doing and saying, then using that knowledge to understand them better. "If you had your own Jarvis, why would you Google? Why would you ask ChatGPT?" George told Business Insider. "None of these other tools capture you. None of them understand you. They don't understand what's happening in your life."

Privacy as the feature, proactivity as the pitch

An always-listening app only works if people trust it, and TwinMind treats privacy as the feature rather than the fine print. Audio is deleted after transcription by default, the user chooses what gets captured, raw audio is never stored or sent to the cloud, and the founders say they don't train models on user data. Most processing happens locally; the cloud is used for advanced queries.

The positioning completes the loop. TwinMind doesn't pitch transcription — it pitches a memory that makes every AI you use smarter, and an assistant that surfaces the right thing before you ask: a morning digest of the day's priorities, the draft of the email you were dreading, a proactive briefing built from yesterday's conversations. "It really understands everything you've gone through, everyone you know, and your values," George told Fast Company.

That's the arc from the JPMorgan script to the desktop launch: a founder who wanted perfect recall of his own meetings, a team that did the native engineering nobody else would do inside Apple's restrictions, and a product that treats your day as the most valuable training data of all — yours.

The playbook

  1. Build from your own pain, then move to the device people trust — George's script was solving his own JPMorgan meeting overload. When colleagues on Blind wanted it but wouldn't run it on work laptops, he didn't argue — he pivoted to the personal phone, the device where always-listening is a feature instead of a compliance problem.
  2. Do the hard native work competitors skip — Instead of React Native and cloud processing like the competition, TwinMind spent six to seven months building a native pure-Swift audio service to survive Apple's background restrictions. The payoff — 16-17 hours of capture — is the spec every competitor would have to redo from scratch to match.
  3. Make privacy the feature, not the fine print — Audio deleted after transcription by default, user-controlled capture, no raw audio stored or sent to the cloud, no training on user data. For an always-listening product, privacy isn't compliance — it's the distribution unlock.
  4. Own a model, not just an app — Ear-3 gives TwinMind a 5.26% word error rate over 140+ languages at $0.23/hour — beating ElevenLabs, covering 100 more languages than Otter and 40 more than Whisper. In a crowded note-taker market, a proprietary speech model is a real moat.
  5. Sell proactivity, not transcription — TwinMind never competes on transcription quality with Otter or Fireflies — it reframes the category as a second brain that powers ChatGPT, Claude and Gemini with your life's context, and surfaces what you need before you ask. The "Jarvis" metaphor does the positioning work.
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