four weeks before YC demo day, we killed what we'd been building. it had a 50% CMO response rate, but we couldn’t stop thinking about an idea that nobody had a name for yet… 10,000 downloads later, that idea is Dex.

@dexbythirdlayer is hiring MTS. Our CTO hates posting but goes viral anyway. His 2nd post ever was AutoAgent. 3.5M views, 4.5k stars, 500 forks. So, my intern spent all day forcing @kevingu to write this hiring post. Enjoy :)

Telegram integration is live! If you're in crypto, trading, or just running serious comms through Telegram, you know that managing chats used to be completely unscalable. Now, Dex has 35 tools that allow it to read, search, and act on Telegram. No more leads going cold, questions getting buried, and context getting lost in an endless scroll of messages.

We're hiring a multi-hyphenate product designer with impeccable taste and technical depth. Current UI models no longer work for AI agents. Every interface was designed for a world where humans did the execution. Now that agents handle the execution, interfaces now serve as channels for intent and negotiation. Nobody’s designed these primitives yet. If you want to be at the frontier of defining what this next generation of UI actually looks like, DM me with your work.

One of our users hit inbox zero and cleared 1,900 emails in a single session. We shipped a full gmail suite that: - scans your inbox with a personalized triage - drafts replies in your voice - auto syncs your CRM - recovers old leads - personalizes outreach at scale - creates action items sent straight to your Slack. Runs every morning or on-demand. You never have to open your inbox. New features launching every couple days.

Introducing First Commit — a new Notable podcast series that talks to builders solving hard problems before the industry catches up. First episode drops tomorrow with @reggitales, co-founder of @dexbythirdlayer.

We pitched AI coworkers at YC demo day before AI coworkers became the obvious direction notion, zapier, glean, everyone was racing into. Before that, we bet on computer-use agents before agents were a thing, and browser copilot before AI browsers existed. Sat down with Notable Capital to walk through what it's like to give up everything, bet hard on something nobody else sees, be obsessed enough to do it anyway, and watch the world wake up to it in real time. Now we’re betting on where it’s headed next.

The AI chat box had a good run. So now what? We’re tackling that question and more at Intent: Proactive & Predictive Interfaces, this Thursday. @amandamhuang and @rkhkimx are moderating a stacked panel featuring Jenning Chen (@simile_ai), @KevinGu (@dexbythirdlayer), @justoutquan (Tomo) and @kneureither (@interaction). May 21st, 6 - 7:30 PM | Co-hosted with @dexbythirdlayer luma.com/vs9pfati

The gap between “I need to do X” and X getting done? That’s an interface problem. We’re getting together this Thursday with founders and builders who are closing it. Join us for Intent: Proactive & Predictive Interfaces, co-hosted with @dexbythirdlayer and moderated by BCV investors, @amandamhuang and @rkhkimx. Doors open at 6 PM! Spots limited: luma.com/vs9pfati

Intent Series pt. 2 is this Thursday: Proactive & Predictive Interfaces. RSVP below. Panelists: Jenning Chen (Simile AI) Kevin Gu (ThirdLayer) Justin Quan (Tomo) Konstantin Neureither (Interaction) hosted with @rkhkimx & @amandamhuang and @aurielws

done - franco.farnedi@f.technology

Been using dex everyday for the past few weeks, and they have a killer hubspot integration so my CRM is always up to date

NEW: @dexbythirdlayer is making the case for self-improving agents. AutoAgent reportedly spent 24 hours autonomously tuning an agent harness, then hit #1 on SpreadsheetBench (96.5%) and the top GPT-5 score on TerminalBench (55.1%). Manual harness engineering is starting to get challenged by agents that optimize themselves.

been using @dexbythirdlayer for 3 months and ngl it feels like my own personal JARVIS atp it reads and labels my emails, helps organize everything, and even plans meetings directly in my Notion calendar As someone working in venture research, this tool is definitely staying.

Everyone should take a look about this product called @dexbythirdlayer A self-driving workspace for operators This is a very interesting tool btw that can literally make your work organization easier

Karpathy was right about personal knowledge bases for LLMs. But markdown files alone won't cut it. Dex captures raw operational events - every Slack thread, email, meeting, deal update - and structures them into a live context graph that agents can reason over at scale. Personal knowledge bases are for you to read. Operational knowledge bases are for agents to act. Get early access at joindex[dot]com

introducing Dex, the first agent system with full operational context and a self-updating knowledge base karpathy's llm knowledge base on steroids Dex ingests raw events from every app in your workspace. every slack message, email, meeting, browser session, task update compounds into one living knowledge base. background agents continuously monitor and enhance it while you sleep so your agents get smarter every day try now at joindex [dot] com

Introducing Dex: the self-driving workspace for operators. Dex is the first agent system with full operational context and a self-updating knowledge base. Every datapoint from your workspace is ingested, synced, and structured into compounding context for agents to take action. Comment "DEX" or tag @dexbythirdlayer access. First 1,000 sign-ups get 7 days free. After, join our rolling waitlist. Sign up at joindex [dot] com for a fun surprise. How dex works (threads)