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How to show up in any room with a low heart rate: Silicon Valley's missing etiquette playbook | Sam Lessin

2026-01-15 - 86 min - source - Read full transcript
Lenny Rachitsky (host)Sam Lessin

Key insights

Etiquette functions as a trust-signaling skill, not surface-level politeness.
Sam frames etiquette as literally 'how to show up in a room with a low heart rate' - projecting calm, non-transactional presence so people read you as someone they can work with and trust. He argues Silicon Valley under-teaches this because young founders come up believing 'only the product matters,' when in reality a low heart rate and good etiquette are the difference between closing and missing a relationship or deal.
founder-etiquette
An abundance mindset beats a scarcity mindset in high-stakes networking.
Sam describes young founders at events like a Kleiner Perkins holiday party treating every conversation like their one shot, which raises their heart rate and 'scares off' the person they're courting. Reminding yourself 'this is part of the story, not the entire story' projects the calm self-confidence that actually makes people want to keep talking to you.
social-capital
Conversations should be a mutual exchange, not a pitch or an interrogation.
Sam repeatedly uses a ping-pong metaphor: hit a question, let them hit it back, then respond - firing off ten questions in a row feels like an inquisition, and a four-minute unsolicited pitch is purely self-centered. The goal is to leave someone thinking 'that was interesting' rather than feeling extracted from or talked at.
communication-norms
How you treat gatekeepers and support staff is a high-signal, low-cost trust builder.
Sam's partner Kevin insists on personally clearing coffee cups and dishes even when someone else will clean up, because they answer to LPs and small gestures of respect toward EAs, servers, and assistants compound. He tells a story of a deal advisor who specifically built rapport with Airbnb's EA and office manager during an acquisition, which 'lubricated' the process.
social-capital
Fit and effort in dress matter more than price, and both extremes read badly.
Sam's rule of thumb is a well-fitting $20 shirt beats a misfitting $500 one, and showing up as a founder with a Rolex is 'classless' because it signals you're trying too hard rather than reading the room. Most people can't judge what an item costs but can intuitively tell whether it fits, so overspending without fit gains you nothing.
status-signaling
Tip aggressively and never let your tip be the memorable part of the meal.
Sam's baseline is 20% minimum, 30% not unreasonable, framed as removing tipping as a variable so no one at the table has cause to think of you as stingy. When dining with someone very wealthy or well-known, he says you should tip at the level they would, because the gesture of offering to pay (even when declined) matters more than the money itself.
social-capital
Sam predicts seed-stage AI-labeled startups will lose investors an 'impossibly large amount of money,' even as using AI itself remains essential.
His argument: AI-native businesses are too capital-intensive for seed economics to work, and technology-only differentiation commoditizes fast. He cites OpenAI itself as evidence - even at a $500B valuation, he estimates its earliest seed investors only made roughly 25x, a mediocre outcome for defining the era, because the capital consumed along the way diluted so heavily.
ai-investing-skepticism
Every generation needs its own 'Terra Nova' narrative, and Sam argues today's AI narrative is being overextended to justify bad bets.
He traces the pattern from the American West to the internet ('digital Terra Nova') to mobile and crypto, arguing each generation is 'desperate' for a frontier story to believe in. He separates this from genuinely disruptive, capital-efficient uses of AI inside existing businesses, which he does invest in (e.g. Sublime Security, Outtake) - his skepticism is specifically about ground-up 'AI company' seed bets.
ai-investing-skepticism
Scheduling etiquette follows a power/business hierarchy, and Calendly links can be a subtle disrespect signal.
Sam argues the less senior or less busy party should let the other person set the time and adapt around it, rather than defaulting to a scheduling-link tool; he publicly criticized Calendly enough to reportedly move its growth numbers for a month. Rescheduling requires giving as much notice as possible and then accommodating the other person's availability even more than usual.
communication-norms
Email 'To' versus 'CC' placement and ordering carries an invisible etiquette language most people never learn.
Sam explains that who appears first in the 'To' field signals who the sender considers most important - putting an assistant ahead of a CEO reads as a mistake - and that being deep in a CC chain signals you're not expected to respond first. He warns proofreading matters doubly here, describing accidentally CCing a person to check the spelling of their own name as one of his worst etiquette failures.
communication-norms
Vibe-coding gets a personal tool to v1 fast, but doesn't scale without real engineers.
Sam describes building the first version of his newsletter-aggregator app Letter Mem himself end-to-end using Cursor, Digital Ocean, and Cloudflare, then handing it off to engineer friends to level it up once he hit the limits of what vibe coding alone could support - offered as a concrete data point on where AI-assisted building is and isn't sufficient.
ai-investing-skepticism

Books referenced

Media referenced

Companies

Techniques and frameworks

Summary

Lenny Rachitsky sits down with Sam Lessin, a partner at Slow Ventures, for an unusually structured episode built around Lessin's self-published etiquette book, born from a viral tweet and now taught in classes to Y Combinator founders. The through-line of the conversation is Lessin's phrase "how to show up in a room with a low heart rate" - the idea that etiquette isn't superficial politeness but a practical skill for projecting calm, trustworthy confidence in high-stakes founder, investor, and social situations. He frames it as newly urgent precisely because software is commoditizing and AI is unsettling people, which makes trust-building human skills matter more, not less.

The two work through Lessin's book category by category: introductions (be early, use people's names, don't make a late arrival awkward), conversation (treat it as a back-and-forth "ping pong," not a pitch or an interrogation, and leave people wanting more rather than exhausting them), hygiene and dress (unremarkable scent, fit over price, dress one level up from the room), dining (tip generously and let someone else set the pace before ordering), humor (self-deprecation is always safe, humor at others' expense requires real rapport), scheduling (accommodate the busier or more senior party rather than defaulting to Calendly, which Lessin has publicly and gleefully trashed), written communication (proofread, avoid emoji in business contexts, and understand the invisible signaling in email To/CC ordering), and exits (stand to shake hands, send brief thank-yous, don't make a production of leaving). A recurring meta-point is that effort is graded alongside execution - someone visibly trying, even imperfectly, earns social credit that a technically correct but indifferent performance doesn't.

The conversation pivots in its final third to Lessin's "AI Corner" and "Contrarian Corner" segments. His AI Corner pick is Letter Mem, a personal newsletter aggregator he vibe-coded with Cursor, Digital Ocean, and Cloudflare that turns newsletters he doesn't have time to read into daily cartoon summaries - a concrete example of what he considers AI's real sweet spot: supercharging an existing workflow rather than being the product itself. His Contrarian Corner take is considerably sharper: he predicts seed-stage investors in companies branded as "AI companies" will lose enormous amounts of money in the coming years, arguing these businesses are too capital-intensive for seed economics and too easily commoditized. He uses OpenAI itself as the illustrative case - even at a reported $500 billion valuation, he estimates its earliest seed backers only made roughly 25x, a mediocre outcome given the company arguably defines the era. He situates this within a recurring "Terra Nova" pattern where every generation (the American West, the early internet, mobile, crypto) manufactures a frontier narrative to believe in, and argues the current AI-company narrative is being overextended the same way.

The lightning round surfaces Lessin's reading list (The Lessons of History by Will Durant as his strongest single recommendation, alongside The Ancient City, Man's Search for Meaning, Area 51, The Fish That Ate the Whale, and The Last Kings of Shanghai), his enthusiasm for the show Landman, a plug for the AI dating app June (which builds match profiles from users' ChatGPT histories), and closing color on his own low-key podcast, More or Less, co-hosted with Dave Morin and their wives.

Notable Quotes

"Etiquette is a skill for how to show up in a room with a low heart rate." - Sam Lessin

"Don't smell like shit." - Sam Lessin

"A well-fitting $20 shirt is way better than a misfitting $500 shirt." - Sam Lessin

"I think that the seed venture capitalists who invest in companies that are branded as AI companies are going to lose an impossibly large amount of money in the coming years." - Sam Lessin

"The internet was digital Terra Nova." - Sam Lessin