Fundraising Fox

Dex

YC W25

San Francisco, US · Founded 2025 · 2 employees · Hiring · 6 known investors

Dex is an AI-powered workspace assistant that ingests operational data across a user's tools and integrations, organizing it into structured context and a knowledge base. It automates tasks, generates insights, and proactively maintains information while users work across their browser and connected applications.

Also known as Dexterity · Dexterity AI · ThirdLayer

AI & Machine LearningEnterprise SoftwareFuture of WorkSaaSArtificial IntelligenceProductivityConsumer ProductsAIUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W25)

Dex was founded in 2025 by Regina Lin and Kevin Gu.

RLRegina Lin
Regina LininFounderShe studied mathematics and computational science at Harvard, and previously co-founded Contour AI, an LLM evaluation devOps platform, while also contributing to e-commerce marketplace development and working in technology investment roles.
KGKevin Gu
Kevin GuinFounderHe studied mathematics and statistics at Harvard and has held quantitative and machine learning research roles at Jump Trading, IBM Research, QuantCo, and Meta.

Investors · 6

Theory Ventures✓ verifiedSan Francisco · $1M – $40M
Y CombinatorSan Francisco · $500K
A16Z SpeedrunreportedSan Francisco · $1M
Concept Venturesreported · 2 sourcesLondon · $1.5M
Notion Capitalreported · 2 sourcesLondon · $1M – $100M

Also in the syndicate · 1

Andreessen Horowitz's Speedrun programme

Funding

SEC filings, press & company announcements

$5.3M disclosed across 1 of 2 rounds · 2025–2026

Source: company announcements and press reports — follow each round's link for the claim.

Competitors · 2

by search overlap
Nexthink18 shared keywordsNexthink is a software company that provides IT departments with real-time analytics, automations, and employee feedback tools to improve digital workplace experiences. Its platform serves enterprise IT teams managing digital employee experience.
DEX Imaging12 shared keywordsDEX Imaging is an independent dealer of copiers, printers, MFPs and office equipment, distributing brands such as Konica Minolta, Kyocera, Canon, Ricoh and Xerox to companies across the United States. The company also develops its own document management software and hardware and manufactures toner cartridges in-house.

Companies competing with Dex for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

Dex Raises €4.52M Seedthesaasnews.com · Jun 2026Dex Raises $5.3M in Seed Fundingfinsmes.com · Apr 2026Dex raises $5.3m to build an AI talent agent for the engineersthenextweb.com · Apr 2026FORTUNE on X: "Dex, an AI-powered recruiting startup, announcd it had raised a $5.3 million seed round led by Notion Capital, with participation from a16z Speedrun, Concept Ventures and angel investors from OpenAI and other firms. https://t.co/X5Ae8E7h4a" / Xx.com · Apr 2026Exclusive: AI-powered recruiting startup Dex raises $5.3 million seed round led by Notion Capital | Fortunefortune.com · Apr 2026Dex Raises $3.1M in Pre-Seed Fundingfinsmes.com · Apr 2025Dex – Your AI Coworker for the Browserycombinator.com · Feb 2025

Frequently asked questions

What does Dex do?
Dex is an AI-powered workspace assistant that ingests operational data across a user's tools and integrations, organizing it into structured context and a knowledge base. It automates tasks, generates insights, and proactively maintains information while users work across their browser and connected applications.
Who founded Dex?
Dex was founded by Regina Lin, Kevin Gu in 2025.
Who are Dex's investors?
Dex's investors include Theory Ventures, Y Combinator, A16Z Speedrun, Concept Ventures, Notion Capital.
How much funding has Dex raised?
Dex has disclosed $5.3M raised across 1 of its 2 known rounds.
Where is Dex headquartered?
Dex is headquartered in San Francisco, US.