Cosign (@cosign) header
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San Francisco
Joined January 2020
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Introducing the Cosign Awards: the people, companies, and products that were the most impactful in 2026. Nominate and vote now: cosign.co/awards
Excited to announce the Cosign Awards: celebrating exceptional people, companies, and products that had a massive impact in 2026. cosign.co/awards Anyone can nominate and vote. Award winners will be chosen by the public in conjunction with a panel of judges, including industry leaders like @lennysan, @packyM, @amasad, and many more. We’ll host an event in December honoring the winners (10 per category). For people categories, we’re mostly focused on everyone except the CEO–everyone else building the company behind the scenes. Companies with the most amount of people nominations will be listed on our “Top Companies to Work For” page. True to form, at Product Hunt I helped launch the Golden Kitty awards a decade ago to recognize great products. Soon after I launched the Rise Awards, honoring executives and ICs building companies that make them. The Cosign Awards is the next iteration. We have 41 categories across people, companies, and products. People categories: - Future Founders - Rising Stars - Engineering - FDE - Product - Design - AI Researchers - Marketing - Comms - Growth - Chief of Staff - Operations - Talent - Finance - Public Intellectuals - Podcaster of the Year - Newsletter Author of the Year - Poster of the Year Company categories: - Rising Stars - Best Place to Work - Founder Mafia - Talent Density - Highest Aura Product categories: - Product of the Year - Launch of the Year - AI Assistant - AI Language Model - AI Coding - Dev Tools - Open Source - Consumer - Productivity - Creative & Media Tools - Product Design & UX - Enterprise B2B - Hardware - Robotics - Self-Driving - Healthcare - Vertical Fintech - Legal
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Everything that happened today in tech | Wed Nov 4, 2026 Job moves: - @realSharonZhou leaving AMD to join Anthropic for frontier research - Pierre cofounders @foobar1234 and @fat joining OpenAI - @_georgerobson and @julienbek leaving Sequoia Capital - HumanLayer cofounders @dexhorthy and @0xblacklight joining Factory - Conductor cofounders @jacksondecampos and @charlieholtz joining Meta - @htihle joining Epoch AI to work on benchmarking
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Fundraises: - Phaze raised an $8.75M seed round - Nooks raised $500M in growth capital - Finpilot raised a $10M Series A Acquisitions: - Pierre Computer Company to join OpenAI - HumanLayer acquired by Factory - Conductor to join Meta
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Product launches: - Baseten Grid provides a unified gateway, intelligent router and guardrails for coding agents. - Ripple-65B Preview is a 65B dense LLM pretrained from scratch by Ricursive Intelligence. - Axiom released a 16 million line open-source Lean formalization of the entire Stacks Project, a foundational algebraic geometry reference work. - Catalyst Forecasting answers questions with probabilities, updates forecasts as news changes, and connects forecast changes to automated trading workflows. - Render Sandboxes provide isolated compute environments for AI agents to run code, persist state and files, and snapshot or fork sessions. - Weave Checks is an open-source agent that checks pull requests against team rules written in Markdown, comments on violations, and resolves comments after fixes. - Morph’s Reflex is a 27B decision model based on Qwen3.5 that produces typed decisions and probabilities from text, JSON, and images, with cached context support. - CellType’s BioSimBench evaluates language models on real laboratory experiments by testing their ability to predict gene expression changes in cells responding to drugs, gene knockdowns, and immune signals. - Kling 4.0 Flash is a faster, lighter video generation model in the Kling 4.0 family, producing 3–20 second 720p clips from text, images or Omni references.
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Cosign retweeted
i made a list of the best tech storytellers on X in 2026 @cosign the bar: – builds agent-native. no commentators – at least one viral post this year (1M+) – can turn a product into a narrative people repeat storytelling is the moat cosign.co/lists/0xjuliechen/…
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Cat Wu, Head of Product for Claude Code, just left Anthropic. Friday was her last day.
Friday was my last day at Anthropic. Two years ago, when Claude Code was a small internal tool, I asked it to build an RL env. I steered it for tens of hours but never manually wrote a line of code. It worked, I was hooked, and I joined the team. When we first launched, most people approved every permission prompt by hand and mostly used Claude to answer questions and write tests.  Today, the default is trusting Claude's judgment to auto-approve. Claude does large migrations and builds new products.  Helping build Claude Code into an industry-defining product has been the journey of a lifetime.  Thank you to the incredible team behind Claude Code, Cowork, and Tag. These products are the sum of thousands of great ideas from you. I'll miss working with you all. Thank you to our users for embracing a new way of working. Your constant feedback shaped so much of what we shipped and your stories made the work so meaningful. Excited to see what you all make next!
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Everything that happened today in tech Job moves: - @_catwu leaving Anthropic - @jillhazelbaker leaving Uber to join OpenAI as Chief Corporate Affairs Officer - @brandon_galang leaving Vercel to join Anthropic as a Member of Technical Staff - @realchillben leaving OpenAI to join a16z - @0xnikhilchat joining Stripe for Crypto GTM - @sumeetm joining Baseten to work on data and compute - @monoxgas moving from Dreadnode to CrowdStrike’s Cyber Superintelligence Lab - @krishnagade joining CrowdStrike with Fiddler AI - @khushi__411 joining Hugging Face as an Open-Source Machine Learning Engineer - @Flynnjamm joining Mecka AI - @pierrecolombo6 joining Google DeepMind to work on legal LLMs - @vicentesandev joining Warp as an engineer - @sjmielke leaving Genentech to join Bloomberg as a Senior LLM Research Engineer
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Fundraises: - fal raised a combined $1.65B across its Series E and F - Traversal raised a $120M Series B - Syncere raised an $11M pre-seed round - Guava raised a $12.5M seed round
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Product launches: - Fireworks Ultrafast is a public preview high-speed inference mode delivering over 1,500 tokens per second for latency-sensitive interactive applications, using NVIDIA Blackwell, along with multi-day prompt caching, background mode for long-running agents, and higher rate limits. - Snowflake Bots are a new class of always-on, proactive AI coworkers that autonomously pursue assigned high-level goals such as keeping data pipelines healthy or monitoring business activity, using governed Snowflake data and inheriting the user’s permissions. - Hermes Mobile is the official iOS and Android beta app for Nous Research's Hermes Agent. It allows users to connect to their own Hermes gateway for chatting, tool approvals, and managing bots from mobile. - Arthur's Deckard: An open-source scanner that discovers rogue and shadow AI agents by scanning endpoints, cloud AI platforms, managed agent environments, network logs and SIEMs, then forwards every finding to Elasticsearch, Splunk or a webhook. - EvoSkill v2 is an open-source three-agent system from Sentient Labs that automatically improves AI agent skills by testing performance, learning from attempts, and rewriting instructions without modifying the underlying model or runtime.
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.@katieschwartz's inspiring founders: - @luanalopeslara (Kalshi) - @travisk (Atoms / Uber) - @palmerluckey (Anduril) - @thejessezhang (Decagon) - @elonmusk (SpaceX / Tesla) - @minnasong (EliseAI) - @bridgitmendler (Northwood Space) - @drfeifei (World Labs) - @matt__schwartz (Afresh) - @sama (OpenAI) - @jack (Block / Twitter) - @miramurati (Thinking Machines) - @jensenhuang (NVIDIA) - @bchesky (Airbnb) - @immad (Mercury) - @reidhoffman (LinkedIn / Greylock) - @zoink (Figma) - @typesfast (Flexport) - @rrhoover (Product Hunt / Weekend Fund) - @amasad (Replit) - @jasoncitron (Discord) - @bouazizalex (Deel) - Henry Ward (Carta) - @shuooo (Deel) - @nottombrown (Anthropic) - @zachbdell (Base Power) - @zachperret (Plaid) - @dylan522p (SemiAnalysis) - @liangsays (MTS) - @danielaamodei (Anthropic) - @alighodsi (Databricks) - @mansourtarek_ (Kalshi) - @max (Instacart) - @tobyphln (formerly xAI) - @mlevchin (Affirm) - @shayne_coplan (Polymarket) - @johnschulman2 (Thinking Machines) - @jgebbia (Airbnb / Samara) - @adamdangelo (Quora) - @akothari (Notion) - @bernhardsson (Modal) - @mati (ElevenLabs) - @davidbaszucki (Roblox) - @brian_armstrong (Coinbase) - @2112power (Hadrian) - @ilyasut (Safe Superintelligence) - @rauchg (Vercel) - @patrickc (Stripe) - @vladtenev (Robinhood) - @alexandr_wang (Meta / Scale AI) cosign.co/lists/katieschwart…
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Continued: - @darioamodei (Anthropic) - @collision (Stripe) - @eglyman (Ramp) - @awxjack (Airwallex) - @alanchanguk (Fuse Energy) - @nstoronsky (Revolut) - @maxjunestrand (Legora) - @melaniecanva (Canva) - @mikeyk (Anthropic / Instagram) - @stewart (Slack / Flickr) - @thom_wolf (Hugging Face) - @robertwachen (Etched) - @arthurmensch (Mistral AI) - @ivanhzhao (Notion)
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btw, 15 days left to nominate someone for the @cosign awards! we have an amazing crew of judges like @andrewchen @qasar @amasad @garrytan @venturetwins @omooretweets and 40+ categories, like: - future founders - rising stars - newsletter writers - chief of staff - podcasters vote here! cosign.co/awards
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.@a16z's American Dynamism 50: 50 Companies Rebuilding and Protecting America Inputs: - Ambrosia Energy - Base Power - Chariot Defense - Endurance Energy - General Matter - Heron Power - Mariana Minerals - Peak Energy - Radiant - Redwood Materials - Valar Atomics Factories: - Amca - Arda Industries - Atomic Industries - Diode - Foundry Robotics - Generalist - Hadrian - Mind Robotics - Nominal - Podium Automation - Prometheus - SendCutSend - Senra Systems - Unlimited Industries - Varda Space Industries - Westmag Systems: - Anduril - Apex Space - Astranis - Castelion - CHAOS Industries - Covenant - CX2 - Forterra - Helsing - Hermeus - Impulse Space - K2 Space - Mach Industries - Neros - Northwood Space - Perennial Autonomy - Relativity Space - Saronic - Shield AI - Skydio - Specter - Stoke Space - Ulysses cosign.co/lists/a16z/the-ame…
The 2026 American Dynamism 50 is here: our annual list of 50 companies, from within the a16z portfolio and beyond, building for America's future. This year's theme is Production is Deterrence. "America's ability to prevent conflict depends on what it can build, how fast it can deliver, and how long it can keep going." A new generation of defense companies is moving from prototypes to full-scale production, and the industrial base has to keep pace. This year's list is organized around three pillars: 1. Systems: the drones, ships, missiles, aircraft, and spacecraft that deter conflict. 2. Factories: the plants, tools, and software that build them. 3. Inputs: the materials and power they're made of and run on. Get all three right, and the impact reaches well beyond defense, to skilled jobs, revitalized communities, and the supply chains behind energy, housing, and everyday goods. Meet all 50: a16z.news/p/ad-50-2026-produ…
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Who are the top engineers of 2026? Nominate + vote now: cosign.co/awards/engineer
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What is the robotics product of the year? In the running so far: - Dana (Applied Intuition) - Figure 03 (Figure AI) - S1 (Skild) - Matic (Matic Robots) - NEO (1X) - Dyna-2.1 (Dyna) - Bedrock Operator (Bedrock Robotics) - Vision-Force-Action (VFA) Model (Eka Robotics) - Digit 5 (Agility Robotics) - Apollo 2 (Apptronik) - The Bot Company (The Bot Company) - Pi API (Physical Intelligence) - Atlas (Boston Dynamics) - Tesla Optimus (Tesla) - Platform 2 (Zipline) - H2 PLUS (Unitree Robotics) - Medra Lab 001 (Medra) Nominate + vote now: cosign.co/awards/robotics
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.@karelvuong's list of goated designers: - @evilrabbit_ (Vercel) - @benjitaylor (X, SpaceXSI) - @joshpuckett (Iteration, Graphical) - @ryolu_ - @jennywen (Cursor, Grok Bot) - @emilkowalski - @matthewyuart - @floguo (Ramp) - @chloepark (MagicPath) cosign.co/lists/karelvuong/g…
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Which tech companies have the highest talent density? Nominate + vote now on the Cosign Awards: cosign.co/awards/talent-dens…
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Which company produces the best founders? Nominate + vote for the top founder mafia on the Cosign Awards: cosign.co/awards/founder-maf…
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What is the Cybersecurity Startup of the Year? Nominate + vote now on the Cosign Awards: cosign.co/awards/cybersecuri…
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What was the 2026 Product of the Year? Nominees so far include: - Jev - OpenClaw - Wispr Flow Dictation - Muse - Grok Bot - iPhone Duo - Supabase - GPT-6 Astra - Claude Opus - Gemini - LlamaParse - Granola - Cursor 3 - Kalshi Exchange - Stream Ring - OpenRouter - Waymo - Eleven v4 - Replit Agent 4 - Savvy Custodial Platform - Fin AI Agent - Hermes Agent Nominate + vote now: cosign.co/awards/product-of-…
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