What is Dex by Thirdlayer?

Dex is a Chrome extension that converts the browser into an AI workspace, centralizing tasks, notes, and context across tabs and apps. It integrates with Google Calendar, Gmail, Google Sheets, and LinkedIn to schedule meetings, prepare meeting briefs, and extract contact data.

Dex saves and organizes quick notes into searchable, context-aware memory for reliable retrieval and next-step suggestions. Users can scrape LinkedIn profiles, export lead lists to Google Sheets, and send personalized mass emails via Gmail using sheet data.

The extension operates across open tabs to reduce context switching for research, CRM, operations, and GTM workflows. Targeted at knowledge workers, hiring managers, sales and operations teams, it supports lead generation, meeting prep, data analysis, and email personalization.

Dex by Thirdlayer on the web:

Dex by Thirdlayer details

Company: ThirdLayer, Inc.
Built for: Businesses and teams

Dex by Thirdlayer tech specs

Works with: OpenAI / GPT
Integrations: n8n Slack Salesforce Google Workspace

Dex by Thirdlayer pricing

Freemium

Dex by Thirdlayer offers a free plan with paid upgrades available.

Auto-renewal: Yes

Trial, refund and renewal terms as stated in Dex by Thirdlayer's own published documentation.

Verify on the official pricing page.

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Dex by Thirdlayer's key features

Integrates with 14+ apps and acts across browser tabs to operate within your web workflow
Predicts and executes next steps by surfacing tasks proactively
Persistent memory that learns from interactions and stores preferences and context
Extracts and exports data (e.g., scrape LinkedIn) to Google Sheets for list building and analysis
Automates communications and scheduling (personalized Gmail sends, schedule meetings using calendar availability)

Dex by Thirdlayer use cases

Prepare concise, automated meeting briefs using Dex by pulling attendee info from Calendar and Gmail, extracting LinkedIn profiles and relevant open-tab context to surface bios, past emails and action items so you can enter meetings fully prepared
Extract and enrich leads at scale with Dex's profile data extractor and cross-tab context manager, auto-populate Sheets with contact details and notes, then generate spreadsheet-driven, personalized outreach sequences to increase response rates
Centralize notes, tasks and contextual memory across tabs and apps in Dex's browser AI workspace, create context-aware summaries and follow-ups tied to specific clients or projects, and sync tasks and draft emails with Gmail and Calendar for seamless execution