Backing founders with capital and sprints @charactercap. Author of SPRINT, CLICK, and MAKE TIME. ex-@gvteam @youtube @google

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Hey yall, quick announcement: Applications are due soon for Character Labs, our startup accelerator in San Francisco! More info and application link at character.vc/labs The only accelerator that's 100% focused on product-market fit, it's based on sprints that we've run with 300+ teams over the past 20+ years (including those at Google, YouTube, Flatiron Health, Slack, Uber, One Medical, Gusto, Phaidra, Inductive Bio, Fathom, Orbital, House Rx, and Extend). If you're pre-pmf and interested in working with us, please consider Character Labs — and reply/dm if you have any questions.
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Based on applications to Character Labs G7 (which we are reviewing now!) the most common startup ideas in late 2026 are: - personal education apps ("learn anything") - personal finance apps ("spend and/or save better") - personal agent apps ("automate your life") - offline experience apps ("do more IRL stuff") - agent memory ("give AI memory across tools") - model interpretability ("understand AI better") - model output verification ("make sure your AI doesn't do anything dumb") - agents for business ("AI that runs your business") - creative tools ("AI that helps you make music/film/etc")
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Oh, how could I forget! AI video editors. Most of the startups are actually AI video editors.
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Very few startups have a moat when they begin. But founders should identify one or more moats they could build, and have a plan for how they might get there. Speed is an important advantage in the beginning, but it is not durable.
"Moats" are the most BS thing in startups. No such thing exists when you start. Google, Apple, Meta can always "just build it". Defensibility is built in increments. Small, immensely focused teams outpace the biggest companies on earth. Investors, get over the moat obsession.
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John Zeratsky retweeted
Had a great time at the @CharacterCap meetup. Got to meet fellow founders and great VCs. These are people changing what the future is going to look like. @eliblee @jazer @narsagna @nishantjosh If you're wanting to change the future and raise from VCs, you have one day left to apply to their next cohort of character labs. DMs are open
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Kevin is right. I had this same thought this morning (I swear I did haha!) Google should buy Instinct, build first-class integrations with all of Google, and throw a zillion TPUs behind it. Plus, they can prefer Google Pay over Link for payments, etc... Would be a huge win if they didn't screw it up :)
Google needs to buy Instinct, they need that product DNA, Notebook isn't going to cut it. Instinct, Muse, Grok Bot, etc., are social ai. I've seen this play out before... I was at Google+ for 3-months running mobile, I tried buy instagram but I was two steps down from Larry, so I didn't have the pull (Kevin had told me Zuck was sniffing around), my SVP said it was 'too expensive.'.. killed me. I bounced to Google Ventures.
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John Zeratsky retweeted
everybody loves skillsync
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Truly thrilling progress from our portfolio company Inductive Bio, predicting human dose directly from chemical structure in drugs!
Today @inductive_bio is launching Beacon-2, which can predict human dose directly from chemical structure. A dirty secret of AI for drug discovery is that most systems optimize the wrong reward, making them near useless in practice. Human dose is the right reward – it’s what every drug program is already optimizing. Making it computable will unlock the real-world impact of agentic drug discovery. Beacon-2 builds on our Beacon-1 models that beat 750+ competitors to win all three OpenADMET blind challenges. Whereas Beacon-1 provided a suite of models for individual molecular properties, Beacon-2 is a single system that predicts human dose end-to-end. It has three configurable modules: an ADMET-PK foundation model, a potency module that can use our fine-tunable co-folding affinity model or physics-based methods like FEP, and a PK/PD model with physiologically-informed mechanistic models of pharmacokinetics. We share validation results from Beacon-2 in a blog we are releasing today. We show that across 20 real-world drug programs running through Inductive, dose predictions from Beacon-2 agree with those from experimental data with a Spearman’s ρ of 0.61. And in a similar study on 325 publicly available compounds from the ExpansionRx OpenADMET competition, we show a Spearman ρ of 0.79. As a proof-of-concept, we gave Beacon-2 to Indy, our medicinal chemistry agent, which used it over 5 autonomous design cycles on a recently disclosed SARS-CoV-2 program to cut predicted human dose 17x, which can be the difference between a drug program that gets killed and that makes it to clinical trials. We compared the compounds that Indy designed using Beacon-2 against compounds from an optimization loop that used a potency-only reward function. The Beacon-2 compounds were favorable across three independent measures: they were preferred by chemists in blinded comparisons 87% of the time; were more druglike according to QED; and had a lower projected dose when computed by alternate methods relying on in vivo rat models and allometric scaling. Based on these encouraging results, we are now running prospective studies where compounds optimized by Beacon-2 will be validated in the lab. Read the full post here: inductive.bio/news/beacon-2 At Inductive, our long-term goal is to build superhuman chemical intelligence, and by completing the reward function for autonomous drug discovery, Beacon-2 is an exciting step toward that goal. Reach out if you’d like to get involved.
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John Zeratsky retweeted
Today @inductive_bio is launching Beacon-2, which can predict human dose directly from chemical structure. A dirty secret of AI for drug discovery is that most systems optimize the wrong reward, making them near useless in practice. Human dose is the right reward – it’s what every drug program is already optimizing. Making it computable will unlock the real-world impact of agentic drug discovery. Beacon-2 builds on our Beacon-1 models that beat 750+ competitors to win all three OpenADMET blind challenges. Whereas Beacon-1 provided a suite of models for individual molecular properties, Beacon-2 is a single system that predicts human dose end-to-end. It has three configurable modules: an ADMET-PK foundation model, a potency module that can use our fine-tunable co-folding affinity model or physics-based methods like FEP, and a PK/PD model with physiologically-informed mechanistic models of pharmacokinetics. We share validation results from Beacon-2 in a blog we are releasing today. We show that across 20 real-world drug programs running through Inductive, dose predictions from Beacon-2 agree with those from experimental data with a Spearman’s ρ of 0.61. And in a similar study on 325 publicly available compounds from the ExpansionRx OpenADMET competition, we show a Spearman ρ of 0.79. As a proof-of-concept, we gave Beacon-2 to Indy, our medicinal chemistry agent, which used it over 5 autonomous design cycles on a recently disclosed SARS-CoV-2 program to cut predicted human dose 17x, which can be the difference between a drug program that gets killed and that makes it to clinical trials. We compared the compounds that Indy designed using Beacon-2 against compounds from an optimization loop that used a potency-only reward function. The Beacon-2 compounds were favorable across three independent measures: they were preferred by chemists in blinded comparisons 87% of the time; were more druglike according to QED; and had a lower projected dose when computed by alternate methods relying on in vivo rat models and allometric scaling. Based on these encouraging results, we are now running prospective studies where compounds optimized by Beacon-2 will be validated in the lab. Read the full post here: inductive.bio/news/beacon-2 At Inductive, our long-term goal is to build superhuman chemical intelligence, and by completing the reward function for autonomous drug discovery, Beacon-2 is an exciting step toward that goal. Reach out if you’d like to get involved.
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Starting in just over an hour!! You can still sign up!
Heads up: On Thursday @jakek @eliblee and I are hosting an AMA and sneak peek at the redesigned format for Character Labs, including the new 5-day "Everything Week" in San Francisco. luma.com/3jhf9wde
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Heads up: On Thursday @jakek @eliblee and I are hosting an AMA and sneak peek at the redesigned format for Character Labs, including the new 5-day "Everything Week" in San Francisco. luma.com/3jhf9wde
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Exciting news for Fathom and @CharacterCap today! Congrats @rrwhite and team — thanks for letting us play along :)
Big news: Fathom is now part of @Superhuman! We’ve always believed the real value of meetings isn’t the notes – it’s what happens after. Joining Superhuman gives us the opportunity to bring meeting intelligence into more of the places where work gets done and take that vision much further. A big step toward what we’ve been building from the start: helping people show up at their best and move work forward. Read the full announcement: fathom.ai/superhuman
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John Zeratsky retweeted
Today, @Fathom officially became part of @Superhuman. I’ve always believed the value of meetings goes far beyond the notes. Superhuman gives us the opportunity to bring that meeting knowledge into more of the places where work happens. Excited for what we get to build together.
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Using Instinct, Muse, Hermes, Codex, Cowork, and Poke as AI assistants has taught me one very important thing: My life is already pretty efficient and optimized. Not to brag.
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YESTERDAY WAS SO FUN We hosted Character Foundations at the Ferry Building in SF and got to spend the day with a group of 40 amazing founders — including engineers, designers, teachers, doctors, a perfumer, and a pair of dentists. Here's what we did: • A Foundation Sprint on lightning speed. Teams clarified their target customer, biggest pain point, real competition, unique advantages, and differentiation. • Live critiques. We spent a bunch of time reviewing and providing feedback on founders' positioning and messaging. Thanks to our brave volunteers who volunteered to have their work analyzed and critiqued in front of a room of strangers! • Had some AMAZING food from The Sarap Shop and GREAT wine from the Ferry Plaza Wine Merchant. • Fire alarm! Not a drill — the alarm actually went off and the entire building was evacuated!! Bonus break. Also, and this is crazy, a bunch of our former colleagues from GV were in the office next door and we had an impromptu reunion with them on the sidewalk 🤯 Join us next time? Head over to character.vc/foundations and sign up to get a notification email when we announce the next one!
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Back in my day, student founders made websites with pictures of cute classmates and apps to coordinate plans for going out with friends. Today they're all, "I'm building agent orchestration for PE rollups of mom-and-pop fertilizer distribution companies in the midwest." I'm like, bro, you're 19.
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Your post got me thinking, M.G. ... So far the only technology product to become The One (that you use constantly in virtually every part of your life) is the smartphone. You can order food, get a ride, melt your brain, find a mate, make money, lose money, learn, forget, play, work, shop, and lots more. For many people it replaced the phone, the scanner, the camera, the computer, the radio, the news, the map, the doctor, the therapist, the coach, the trainer, the friend, and lots more. Does it do things for you? No, not exactly, but it's remarkably ubiquitous and helps you live your life. You might describe it as a "personal assistant" of sorts. It can be even more capable with better-integrated AI. And interesting that it was developed with a platform approach instead of the monolithic product approach that today's batch of personal assistants are taking.
For about the 40th year in a row, we're being promised that the ultimate 'personal assistant' technology is around the corner. But is it? AI certainly helps, but we still feel very far from a killer use case, let alone product... spyglass.org/the-swiss-assis…
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