Calvin French-Owen @calvinfo
Making things, trail running. Prev: Codex @OpenAI, https://t.co/4qWGncHOAX, co-founder @Segment, @MIT calv.info Bay Area Joined May 2009-
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@turtlesoupy epic run, congrats and best of luck!
Introducing Roughdraft! A new open source project designed to make collaboration with agents better. The idea is to bring commenting and suggested changes to markdown (e.g. plan docs) in a nice interface. Free, local, etc. 👉 roughdraft.md 👈
Couldn't be more happy for @RattrayAlex and @StainlessAPI. Congratulations on building a great company and powering the world's biggest SDKs. Excited to see where you take things at @AnthropicAI Honored to play a small part with @JenniferHli, @laurenmhreeder, and countless others!
We're thrilled to announce that Stainless is joining @AnthropicAI! Stainless was founded to make software better for everyone, and we're honored to continue that mission on the Anthropic team. Check out the announcement blog post for more: stainless.com/blog/stainless…
We’re talking about Goblins. openai.com/index/where-th…
In 2016, we hired a 16yo software engineer. 10 years later, he and his cofounders have built a $2.75B company. Congrats @tejasmanohar @joshwget @kashgupta_, extremely proud of you all!
i'm really excited to share that we've raised a 150M Series D valuing @HightouchData at $2.75B WSJ broke the news this morning, which is honestly a "pinch me" moment as a founder there's already AI for legal, customer service, and coding we're building the AI platform for
As a college student, Peter Reinhardt (@reinpk) started a company that stumbled, pivoted, and nearly ran out of money before a small open-source library became Segment—the data layer behind thousands of software companies and was later acquired by Twilio. On the Social Radars with @jesslivingston and @cjoneslevy, he reflects on the panic attacks, pricing mistakes, and how he learned to sell by listening hard to customers. Lessons he now carries into Charm Industrial, where he’s working to remove CO2 from the atmosphere and store it permanently underground. 00:00 – From MIT to YC: The ClassMetric idea 07:02 – When your customers don’t actually care 12:38 – A year in the wilderness building analytics 18:27 – Panic attacks and the lowest point 27:18 – The Hacker News post that saved the company 35:06 – Learning to sell (and asking for 1000x more) 44:52 – Hitting product-market fit the hard way 54:10 – The moment revenue started shrinking 1:02:33 – Selling Segment & starting Charm
@lalkaka @usefiretiger @Cloudflare @segment @Twitch Congrats, so excited for you!
Today we're introducing @usefiretiger. You and your AI agents write code. Firetiger makes sure it works. Our team and I have plenty of incident war stories building @Cloudflare, @segment, @Twitch. In the agentic coding era, the volume of code changes + quality issues in prod is ever increasing, but observability vendors aren't incentivized to close the gap. They make money when you write more data to them, not when your software actually works. Firetiger is the agentic operations layer for the agentic coding era. We combine production observability data, codebase understanding, and knowledge of your business to find problems before your customers do and fix them before they notice. We've raised $7.6 million led by @sequoia with participation from angels who believe in better software, including @eastdakota, @calvinfo, @NicoRosberg, @dok2001, @jeffawilke, and @alanaagoyal. You can sign up for @usefiretiger today, self serve. We charge for agents that directly make your software better and more reliable, not for observability data ingested, with plans starting at $599/month. Observability is dead. Long live outcome engineering.
@MillionInt Congrats on an incredible run, OpenAI was very lucky to have you push the frontiers. Excited for whatever's next!
My lobbyists are very nervous about me posting this, but over-regulation is working against us all. The costs are astronomical to us all, but hidden. So, I'm taking a risk, and sharing my stories from Charm and Revoy: rein.pk/over-regulatio…
Today we are launching my favorite feature of ChatGPT so far, called Pulse. It is initially available to Pro subscribers. Pulse works for you overnight, and keeps thinking about your interests, your connected data, your recent chats, and more. Every morning, you get a custom-generated set of stuff you might be interested in. It performs super well if you tell ChatGPT more about what's important to you. In regular chat, you could mention “I’d like to go visit Bora Bora someday” or “My kid is 6 months old and I’m interested in developmental milestones” and in the future you might get useful updates. Think of treating ChatGPT like a super-competent personal assistant: sometimes you ask for things you need in the moment, but if you share general preferences, it will do a good job for you proactively. This also points to what I believe is the future of ChatGPT: a shift from being all reactive to being significantly proactive, and extremely personalized. This is an early look, and right now only available to Pro subscribers. We will work hard to improve the quality over time and to find a way to bring it to Plus subscribers too. Huge congrats to @ChristinaHartW, @_samirism, and the team for building this.
I've always thought there should be a "Cursor for Slides". Congrats on the launch @thisisgrantlee.
Excited to introduce: Gamma 3.0 A generational leap for the world's most popular AI presentation tool. Two major changes: 1. Gamma Agent - with one prompt, you can make sweeping edits across the presentation. a. Say 'make it more visual' and it will scan each slide for data
We’re releasing new Codex features to make it a more effective coding collaborator: - A new IDE extension - Easily move tasks between the cloud and your local environment - Code reviews in GitHub - Revamped Codex CLI Powered by GPT-5 and available through your ChatGPT plan.
New post: The Coding Agent Metagame Musings on building trust with the user, establishing a feeling of flow, and what makes the CLI a surprisingly good form factor for agents.
@kepano Thank you for making this + Obsidian. I'm a huge fan
@MillionInt Thanks JT! I learned a ton from you and your slack posts about managing effective research efforts. Excited to see you produce the next set of wonders
@sulmanrc Thanks Sulman! The pleasure was all mine, couldn't have asked for a better learning experience
As they say, some personal news– I just left @OpenAI after launching Codex. Extremely grateful to everyone there who I got the chance to work with and learn from. Still figuring out what's next, but there's a lot left to build out there.
@edwinarbus Likewise, sad we didn't overlap more. Keep on making the magic happen 🫡
Lenny Rachitsky @lennysan
371K Followers 3K Following Deeply researched product, growth, and career advice
Peter Reinhardt @reinpk
21K Followers 103 Following Founder/CEO working on @CharmIndustrial, @RevoyInc, Antipode. MIT aerospace. Mad fanboy of @embrein. Lots to learn.
Jason Warner @jasoncwarner
38K Followers 2K Following Now: Co-founder @poolsideai Board Bridgewater, @atlassian Then: CTO @github @heroku @canonical BS CS @penn_state MS CS @rpi
swyx @swyx
164K Followers 4K Following achieve ambition with intentionality, intensity, integrity & insanity. affiliations: - @dxtipshq - @cognition - @temporalio - @aidotengineer - @latentspacepod
Karri Saarinen @karrisaarinen
89K Followers 1K Following ceo of @linear 🇫🇮🇺🇸 previously: @coinbase @airbnb, YC alumni
Sar Haribhakti @sarthakgh
100K Followers 2K Following
Y Combinator @ycombinator
1.6M Followers 364 Following We help founders make something people want. Subscribe to our newsletter: https://t.co/sjqjxxBeLc
Jake @JustJake
31K Followers 1K Following Founder @Railway, the smoothest way to ship software. People, Product, Production. DMs open.
immad @immad
395K Followers 3K Following CEO @Mercury. Investor: @RappiColombia, @Airtable, @Rippling, @SubstackInc, @AppliedInt, 300+. Cohost of Founders in Arms Podcast.
Kevin Kwok @kevinakwok
35K Followers 5K Following
sisyphus bar and gril... @itunpredictable
19K Followers 733 Following blog poaster @amplifypartners @readtechnically
Alex MacCaw @maccaw
39K Followers 3K Following Fallible optimist. 👨🏻🎨 Building @reflectnotes 💰 Investing https://t.co/nO82gNOeDS 🤓 Founded @clearbit
Jeff Weinstein @jeff_weinstein
49K Followers 7K Following product at @stripe. tiny angel investor. led @wagonhq (acq by @box) and @hyperpublic (acq by @groupon). i reply to good cold emails.
Flo Crivello @Altimor
49K Followers 1K Following Founder @getlindy. "Striving to remember the obvious over grasping the esoteric."
Nathan Baschez @nbaschez
49K Followers 6K Following Founder of @lexdotpage. AI scout at @trueventures. Previously: co-founder @Every, first employee @SubstackInc. Always: @SoniaBaschez
evan j @ejcx_
9K Followers 1K Following 👾👾 Co-Founder of @RunReveal . 🐄🐄 JMU Double Duke. There's always more to learn.
Brian Kirsch @bkcontracting
2 Followers 27 Following
charlesyi @kplngyii
0 Followers 8 Following
Sago 🇮🇱 @Meta_Thinker
151 Followers 4K Following
YUN GAO @gao_yun50562
1 Followers 64 Following
WhaleGuardian @hamlaouipolygon
249 Followers 2K Following (Transaction Simulator) (Liquidity Scanner)
jieke @nice2me2you2
0 Followers 27 Following
Prateek Singh @Iprateeksing
218 Followers 1K Following Product Manager | AI • Cricket • Finance • Politics Simplifying complex topics for everyday Indians 🇮🇳 Thoughts = My own | Facts + Fun daily 🔥
Robert Aduviri 🦙 @robert_aduviri
786 Followers 2K Following Data scientist & Software engineer. 鯉友。Aqours/虹ヶ咲/Liella!/蓮ノ空/RAS/シャニマス. DS competitions, live concerts, 📷 🇵🇪✈🇯🇵🇨🇦🇺🇸🇧🇷
Niko Tikkanen @nikotikkanen_
5 Followers 167 Following Building @spectry_io • Passionate about coding, analytics, data, and building meaningful products.
Daniel @Daniel_Pezarro
0 Followers 35 Following Building AI systems where agents can work inside real apps, with memory, sandboxes, evals, and humans still in the loop.
Adam K. @akantro
14 Followers 508 Following
Ubaid @ubaidmume
207 Followers 7K Following Students use AI for answers but don't actually learn - I'm fixing that
Trenton Riggs 🇺�... @riggs_trenton
1K Followers 1K Following currently @KhoslaVentures | prev. president @JackArcherBrand @ThomaBravo
ZHU Byron @0x627a6875
0 Followers 46 Following
عبد الله أح�... @xbdullahahmxd
1 Followers 317 Following
Prithvi Anil Kumar @jesusinsnkrz
55 Followers 633 Following I'd rather not talk about it, just do that shit. engineering @ CRED
Mandeep @themandeepc
117 Followers 484 Following Building network-based computer use agents @ https://t.co/BuSn10E4gi. Systems engineer and PL enthusiast
Dr Zhou @AI_BMIC_PMIC
16 Followers 536 Following Battery AI algorithms, AI Battery Management System, Battery Datasets, ML, DL
Guohao Li 🐫 @guohao_li
14K Followers 4K Following Founder @Eigent_AI / @CamelAIOrg. Scaling RL Environments for Agents. Prev Oxford, KAUST, ETHz, Intel, Kumo.
Alessandro Moretti @alesmoretti
86 Followers 460 Following Marketing Technologyst deep into AI, Coffee lover, Motorcycling afficionado
Alex Rattray @RattrayAlex
2K Followers 1K Following Founder @StainlessAPI, previously developer platform & products @Stripe
Lauren Frailey @laurenfrailey1
5K Followers 2K Following founding talent, growing @mintlify - we’re hiring!!! | 53/196 🌏 | prev. @blackstone portfolio operations, @ucberkeley | †
Hardik More @hardik__more
224 Followers 690 Following Product + Startups + Finance | building @dhanhq | earlier @finz_capital
tian tian @sttm81841217
35 Followers 2K Following
Emile Daou @EmileDaou
209 Followers 4K Following
Erdem @ErdemKirez
210 Followers 1K Following ex-eng @lighter_xyz @lunchclubai @google @meta @cognitedata
Daniel Pezarro @Daniel_pezi
0 Followers 62 Following
jaisel @jaiselsingh
3K Followers 636 Following perception & ml @Overland_AI_X | robotics @columbia | prev: @astranis @spacex (opinions are my own)
Souhail Marghabi @thegintalord
112 Followers 1K Following Mobile Architect → EM. 15 yrs in security, automotive, fintech, IoT, healthcare. Now leading web & mobile teams on agentic AI.
shubham @ShubhamInTech
2K Followers 2K Following ceo https://t.co/Fq3PewMpH3 (yc s26) • infra for self-improving agents
Alex @ajonatok
35 Followers 1K Following
Mikeias Oliveira @mikeolimelo
6 Followers 1K Following
Winkle @robbwinkle
292 Followers 886 Following Building AI for the real world. token maxxing. prev: https://t.co/qB3Y1eZhnG, martech, enterprise consulting, @Techstars
Peter Pine @peterpine83
128 Followers 1K Following Tech enthusiast | Driven by design, flow, and the lessons of competition | Believer in time’s value, growth through iteration, and the beauty in imperfection.
tanuja devadiga @TanujaDeva47734
100 Followers 3K Following
Praveen Sridhar @psbots
1K Followers 5K Following Machine Learning Engineer building in the healthcare and insurance space. Co-founder of @tinkerhub, a non-profit educational initiative.
denver @denverpeterson
657 Followers 4K Following 🌱 Builder & lifelong learner exploring fast changing landscape of AI + people + systems.
Amelia Wattenberger �... @Wattenberger
35K Followers 5K Following design, AI, web dev, data viz, tools for thought ✨ @shv, previously R&D @GitHubNext, design @AdeptAILabs
Christopher Golda @golda
4K Followers 965 Following VGP @YCombinator. Investor @Apex_Satellites, @Benchling, @Coinbase, @Ollama, @PierreComputer, @Resend, @Stoke_Space, @Supabase, @UseCorgi, more
delian @zebulgar
273K Followers 938 Following space drugs and arms @vardaspace | village idiot/partner @foundersfund | porthos @hillvalleyforum
Jack Altman @jaltma
226K Followers 611 Following Partner @Benchmark. Previously founded Alt Cap and Lattice.
Peter Reinhardt @reinpk
21K Followers 103 Following Founder/CEO working on @CharmIndustrial, @RevoyInc, Antipode. MIT aerospace. Mad fanboy of @embrein. Lots to learn.
Jason Warner @jasoncwarner
38K Followers 2K Following Now: Co-founder @poolsideai Board Bridgewater, @atlassian Then: CTO @github @heroku @canonical BS CS @penn_state MS CS @rpi
Daniel Gross @danielgross
229K Followers 0 Following
swyx @swyx
164K Followers 4K Following achieve ambition with intentionality, intensity, integrity & insanity. affiliations: - @dxtipshq - @cognition - @temporalio - @aidotengineer - @latentspacepod
Karri Saarinen @karrisaarinen
89K Followers 1K Following ceo of @linear 🇫🇮🇺🇸 previously: @coinbase @airbnb, YC alumni
Mitchell Hashimoto @mitchellh
203K Followers 147 Following Creator of Ghostty. 👻 Prev founded @HashiCorp, created Vagrant, Terraform, Vault, and others.
Y Combinator @ycombinator
1.6M Followers 364 Following We help founders make something people want. Subscribe to our newsletter: https://t.co/sjqjxxBeLc
Cindy Sridharan @copyconstruct
46K Followers 161 Following
Jake @JustJake
31K Followers 1K Following Founder @Railway, the smoothest way to ship software. People, Product, Production. DMs open.
Rasmus Andersson @rsms
89K Followers 3K Following Adventures in software & design. Founder of @playbit_, designer of Inter, @Figma, @Spotify. Eng & design @Facebook
Kevin Kwok @kevinakwok
35K Followers 5K Following
sisyphus bar and gril... @itunpredictable
19K Followers 733 Following blog poaster @amplifypartners @readtechnically
Stewart Butterfield @stewart
134K Followers 3K Following Slack boss • Flickr co-founder • Thought loser • ¯\_(ツ)_/¯ • I'm trying my hardest!
Alex MacCaw @maccaw
39K Followers 3K Following Fallible optimist. 👨🏻🎨 Building @reflectnotes 💰 Investing https://t.co/nO82gNOeDS 🤓 Founded @clearbit
Simon Eskildsen @Sirupsen
18K Followers 834 Following co-founder & ceo @turbopuffer, former infra @Shopify 1k→1m RPS
Alfred Lin @Alfred_Lin
96K Followers 356 Following Partner @sequoia. Working w/ founders from idea to IPO & beyond: @airbnb @doordash @citsecurities @kalshi @clay @foundforbiz @Nominal_io @zipline
Matt Pocock @mattpocockuk
287K Followers 784 Following I teach devs for a living. Author of Total TypeScript and AI Hero. Ex-@vercel. Used to be a voice coach.
Thomas Dimson @turtlesoupy
7K Followers 683 Following Ex-MTS @OpenAI. Former CEO @illdotinc (acq. OpenAI). Authored “the algorithm” @Instagram. 🇨🇦. Purple monkey dishwasher.
Charlie Marsh @charliermarsh
40K Followers 918 Following @OpenAI. Building Ruff, uv, ty, and other high-performance Python tools with the @astral_sh team.
Jennifer Li @JenniferHli
14K Followers 2K Following GP @a16z AI x Infra. 💙 Data, AI and dev tools. Portcos: @ElevenLabs @FAL @Ideogram_ai @mintlify @motherduck @usepylon @resend @reductoai @StainlessAPI
Chris Tate @ctatedev
59K Followers 2K Following @Vercel Labs | Created https://t.co/473Fqx4HKt, https://t.co/ZekOfFeoXF, https://t.co/9MKvOdyxN3, https://t.co/Bnt6dbEdSi, https://t.co/SODeKvPbac | Husband & Dad | He/him | Musician, Space Nerd, Foodie | Vegan
Tomek Korbak @tomekkorbak
4K Followers 617 Following ai safety @openai | previously: @AISecurityInst @AnthropicAI @nyuniversity @SussexUni
Dylan Patel @dylan522p
137K Followers 1K Following SemiAnalysis Boutique AI Infrastructure Research and Consulting DMs are open for consulting, quotes, or to talk shop, Opinions my own
Zain Shah @zan2434
20K Followers 3K Following teaching machines @southpkcommons previously: @samsung @opendoor @openai @ycombinator S13
Justus Mattern @MatternJustus
8K Followers 839 Following Co-Founder @ProximalHQ | prev. research @PrimeIntellect, @MPI_IS and built revideo
sunil pai @threepointone
53K Followers 3K Following 🎈 Entscheidungsproblem. https://t.co/DISzWsXdnE forky mcforkface.
Steve ☕️ @stevendcoffey
3K Followers 505 Following API things @openai. Former founder, lifelong builder | 〽️ Go blue
Rohin Dhar @rohindhar
103K Followers 401 Following San Francisco real estate agent (DRE #02237476). Real estate investor in Sonoma, Kauai, Taos, Yosemite, Asheville properties. Alum: Stanford GSB,YC
Rivet @rivet_dev
4K Followers 2 Following Rivet Actors are the primitive for stateful workloads. Built for AI agents, collaborative apps, and durable execution. Open-source.
Martin Amps @martinamps
3K Followers 757 Following labs at @AnthropicAI. formerly @stitchfix @twilio @iCracked - views are my own
Mario Zechner @badlogicgames
53K Followers 1K Following Armin's handler at https://t.co/B05ybKGkzx. Old man yelling at Claudes. https://t.co/Q1wG57v1yc https://t.co/mnOoWUr0TO https://t.co/8i5vIRE0Wn
Amanda Askell @AmandaAskell
103K Followers 662 Following Philosopher & ethicist trying to make AI be good @AnthropicAI. Personal account. All opinions come from my training data.
Anthony Morris ツ @amorriscode
31K Followers 2K Following claude code @anthropicAI | ex @stripe → https://t.co/AjndW0qdf0
Jarred Sumner @jarredsumner
177K Followers 643 Following building @bunjavascript at @anthropicai. formerly: @stripe (twice) @thielfellowship. high school dropout. npm i -g bun
Anthropic @AnthropicAI
1.3M Followers 2 Following We're an AI safety and research company that builds reliable, interpretable, and steerable AI systems. Talk to our AI assistant @claudeai on https://t.co/FhDI3KQh0n.
Rustam X. Lalkaka @lalkaka
1K Followers 1K Following building @usefiretiger. formerly vp product @cloudflare. claude is teaching me to dance.
Karina @karinanguyen
44K Followers 999 Following building @thoughtfullab, prev. AI research & product @OpenAI, @AnthropicAI, @maisonagi
Andrew Milich @milichab
47K Followers 2K Following @xai @spacex previously @cursor_ai, former CEO @skiffprivacy (acquired by @notionhq)
Ryo Lu @ryolu_
86K Followers 2K Following Design @Cursor_ai. Early @NotionHQ, @Stripe, built startups. I make a world where anyone can make software. Aspiring k-pop idol.
Jason Ginsberg @JasonBud
26K Followers 1K Following building @xai. fmr @cursor_ai, @NotionMail, founder/CTO @skiffprivacy
dominik kundel @dkundel
20K Followers 2K Following @OpenAI DevX, Codex, gpt-oss, TS Agents SDK - he/him - Opinions my own
Brie Wolfson @zebriez
15K Followers 2K Following ghostwriter and early days with @camillericketts, investing @psumvc / story @colossusmag, used to @cursor_ai @stripe @stripepress @figma
Ekin Dogus Cubuk @ekindogus
9K Followers 485 Following Co-Founder of @periodiclabs Past: Lead of materials science and chemistry at @GoogleDeepMind; Google Brain
Liam Fedus @LiamFedus
35K Followers 1K Following Building industrial-scale science at @periodiclabs Past: VP of Post-Training @OpenAI; Google Brain
Rohan Pandey @khoomeik
42K Followers 3K Following descending cross-entropy to ascend entropy @PeriodicLabs || prev research @OpenAI @CarnegieMellon '23
Shlok Khemani @shloked
3K Followers 2K Following playing with llms and dreaming about the future / into long walks, hiking, photography, lfc
Kelsey Piper @KelseyTuoc
64K Followers 1K Following We're not doomed, we just have a big to-do list.
dex @dexhorthy
19K Followers 2K Following building the post-IDE IDE at https://t.co/hDpglj9veo - @aitinkerers sf lead, prev @replicatedhq @SproutSocial @nasa - ai that works pod @ https://t.co/69BhaNtopF
Lee Robinson @leerob
258K Followers 800 Following Teaching developers @cursor_ai, previously @vercel
Sholto Douglas @_sholtodouglas
46K Followers 2K Following Scaling RL @AnthropicAI, ex @DeepMind - working towards intelligence too cheap to meter
Rohan Varma @TheRohanVarma
23K Followers 344 Following codex @openai, prev: @cursor_ai @adoptclarity, @tryexplo, @czi, @palantirtech


































