Karen Serfaty
san francisco / @keyserfaty
Companies
- Atlas — co-founder, CEOglobal expense management and corporate cards for distributed teams. acquired by Remote, 2026.
- Palabra — co-founder, CEOproduct analytics that let app makers see what users actually do inside their apps. raised $1M led by Daniel Gross and Jason Calacanis. (palabra.io, no longer active.)
- Nilus — CTOtech to reduce cost of living for low-income communities by cutting out intermediaries, rescuing food waste, and organizing community buying groups.
Active research
- Where the Longevity Discourse is Systematically Wrongcalibrated synthesis of 38 aging interventions. pre-committed methodology, locked anchors, falsifiable verdicts. ~8,000 words, 71 cited references.
- Thought-to-Text — non-invasive telepathywearable sEMG+EEG hybrid for cross-subject, sequence-level silent-speech decoding. open benchmark and foundation model.
- Agent Cardsterminal-first virtual debit cards for AI agents. fund a wallet, issue one-time-use cards over MCP.
Writing
- ambition feeds itself
- how to have original thoughts in the age of ai
- how I'd validate PMF for 15 ideas
- how we went from releases every 6 months to weekly releases
- how to think of startup ideas
- my bad traits
- what's next for emails
- on having biases
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