Home›Companies›Dex

Dex

Y Combinator LogoW25
Active
generative-ai
productivity
consumer-products
automation
ai-assistant
San Francisco
 
https://joindex.com/

The AI Browser Copilot

Dex is the AI copilot built for the browser. Most web agents are optimized for "set-and-forget" tasks—you hand them off and check back later. But what about the workflows you'd want to drive? Jumping between tabs, browsing sites, filling forms, and searching across apps—these experiences demand instant, context-aware models that work with you, not just for you. Dex turns your browser into an intelligent workspace that understands your intent. With simple voice and text, it enhances familiar interfaces, automates mundane actions, and helps 10x your productivity on the browser. No more slow handoffs. No more context-switching. Just AI that moves at your speed.
Dex
Founded:2025
Team Size:2
Status:
Active
Location:San Francisco
Group Partner:Michael Seibel
  
Active Founders

Regina Lin, Founder

Regina is the co-founder & CEO of Dexterity. She studied Mathematics with a concurrent master's in Computational Science at Harvard (dropped out). She previously co-founded Contour AI, a devOps tool for LLM evaluation, helped build the MVP an ecommerce marketplace with 40K+ customers and worked in various tech investment roles.
Regina Lin
Regina Lin
Dex
 

Kevin Gu, Founder

Kevin is the co-founder & CTO of Dexterity. At Harvard, he studied math in undergrad and statistics for his concurrent master’s. He has worked as a quantitative/ML researcher at Jump Trading, IBM Research, QuantCo, and Meta.
Kevin Gu
Kevin Gu
Dex
 
Company Launches
Dex – Your AI Coworker for the Browser
See original launch post ›

Hey! We’re Kevin and Regina from Dexterity. Today, we’re launching Dex—the fastest interface for co-working with AI, right inside your browser.

TLDR: AI that works with you, not just for you. 10x your workflows without breaking your flow. Try Dex (Beta) → getdexterity.com

Why We’re Building This

Four weeks before Demo Day, we pivoted to build for ourselves.

Most AI web agents today are “set-and-forget” chats—you hand them off and check back later. But what about workflows you actually want to drive? Navigating platforms, moving data, making quick decisions—these moments demand instant, context-aware models that work with you, not just for you.

Imagine using Operator to order DoorDash—a frustratingly back-and-forth relay with no real-time visibility. That same friction exists for work tools like Jira, GSuite, and GitHub, where users need instant feedback and responsive action, not slow AI handoffs.

That’s why we’re taking a Cursor (vs. Devin) approach—for the browser.

The Problem

Modern work is a juggling act of 15+ tabs, software bloat, and constant UI friction, just to complete a single task.

The real bottleneck isn’t just automation—it’s context switching. Traditional solutions force users to memorize shortcuts (appeals to devs, but leaves everyone else behind), while AI tools make you adapt to them instead of living right where you work.

Why not turn your browser itself into an intelligent personal workspace?

How It Works

With simple voice and text, Dex enhances familiar interfaces, automates mundane actions, and understands your intent.

  • Smart Navigation🔸Find, execute, and move between apps.
  • Suggest Context🔸Cut down tab-switching and manual searching.
  • Cross-App Automation🔸Shortcut multi-step workflows, zero setup.
  • Adaptive UI/UX🔸Reshape, replicate, and browse by your rules.

Think of it like Spotlight Search meets AI automation + personal expert for everyday apps.

Use Cases

  • GSuite – Write emails, find docs, and move data anywhere.
  • GitHub – Search repos, manage issues, and navigate faster.
  • Omni AI – Talk to and reference live tabs or integrated apps.

Coming Soon…

  • Meetings 📅 → Create and join calendar and Zoom events instantly
  • Sales 💼 → Automate clicks across LinkedIn, Sheets, and Apollo.io
  • Snippets ✂️ → Dex captures notes, links, and frequent snippets
  • Food 🍔 → Speak to browse options and order DoorDash

Our Ask

We’re building Dex for power users, founders, students, and curious explorers—because that’s who we are.

Join our waitlist → Get notified when Dex goes live on the Chrome store.
Follow us on Twitter → Stay updated on latest features.
Discord → Get to know us more personally + brainstorm cool ideas.

Drop dream features to regina@getdexterity.com and let us know what you think!