Dex by Thirdlayer vs Scarlett: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Dex by Thirdlayer and Scarlett — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Dex by Thirdlayer
Thirdlayer
A Chrome workspace extension that acts as a second brain, remembering context, tasks, and helping you move work forward.
Key features
- Contextual Memory: Persists and recalls page- and task-specific context across browsing sessions so the workspace can surface relevant history and suggestions tied to the current tab.
- Unified Workspace: Consolidates notes, bookmarks, tasks, and past interactions into a single Chrome-accessible panel to reduce context switching and keep work organized.
- Context-Aware Suggestions: Analyzes the current page and open tabs to propose next actions, relevant resources, or follow-up tasks that help move work forward.
- In-Browser Summaries: Generates concise summaries of long articles, threads, or meeting notes directly in Chrome to accelerate understanding and decision making.
- Quick Commands & Shortcuts: Provides a command palette or quick actions to create tasks, capture snippets, or jump to saved contexts without leaving the browser.
- Integrations & Linking: Links captured items to external tools and common web services (e.g., drive, docs, messaging) so information captured in Dex can be reused across workflows.
- Searchable Knowledge Base: Lets users search past captures, notes, and interactions from within the extension to rapidly retrieve previously seen content.
- Privacy Controls: Local or per-item controls to manage what browsing context and captured data the workspace retains and exposes to the assistant.
- Chrome/Chromium extension that provides a unified AI workspace inside the browser
- Persistent contextual memory across browsing sessions (remembers tasks, context, and history)
- Natural-language contextual search across open tabs, bookmarks, and saved pages
- Automatic page summarization and content distillation
- Note-taking and lightweight task tracking integrated with browser context
- Web clipping and saving of pages for later retrieval
- Contextual suggestions to help move tasks and projects forward
- Primary integration surface is the browser extension / web UI; no public API or SDK documented in provided content
Best for
- Research Summaries: Quickly summarize long articles or multi-tab research into concise notes tied to a project context for faster synthesis.
- Project Onboarding: Collect and present all task-relevant pages, documents, and prior decisions for a new project so new contributors ramp up faster.
- Writing Assistance: Capture context from reference pages and automatically insert summaries, quotes, or citations into drafts to speed content creation.
- Customer Support Triage: Aggregate conversation threads and product docs into a single context card to craft faster, consistent responses.
- Task Tracking From Pages: Create and manage follow-up tasks directly from web pages (e.g., product pages, tickets, PRs) and have Dex remind you in-context.
- Knowledge Retention: Maintain a searchable history of decisions, notes, and saved snippets so teams can retrieve rationale and prior research later.
- Research and literature review: aggregate and summarize web pages and retain context across sessions
- Meeting and agenda prep: collect relevant pages/notes and get summarized briefings
- Personal knowledge base: capture and search bookmarks, clippings, and notes with contextual memory
- Customer support / reference lookup: surface relevant pages and summaries quickly during interactions
- Developer/productivity workflows: keep task context and related resources accessible inside the browser
S
Scarlett
Scarlett
AI co-worker in Slack — connects to 3,000+ tools, drafts decks, ships PDFs, writes code and runs scheduled workflows end to end.
Key features
- Slack-Native Colleague: Install from the Slack App Directory and interact with Scarlett in threads like any teammate.
- Own Cloud Workspace: Scarlett has her own cloud computer where she writes and runs code to deliver real outputs (PDFs, decks, dashboards, scripts).
- 3,000+ Integrations: Connects to Salesforce, HubSpot, Notion, Stripe, Linear, Jira, GitHub, Google Drive, Google Calendar, Google Ads, X/Twitter and more.
- Scheduled Workflows: Recurring jobs like Daily Team Brief (7am), Weekly Business Report and Project Status Digest that post straight to Slack.
- Prebuilt Workflow Templates: Meeting Prep Briefing, Customer Feedback Themes, Customer Support Triage and other ready-to-run team ops recipes.
- Autonomous Operations Mode: Run Scarlett as an 'overnight review' agent that manages customers and reports on revenue, signups and churn.
- Fast Onboarding: Set up in under 3 minutes; $50 in free credits to try before committing.
Best for
- Marketing Ops: 'Pull our Meta Ads data and compare vs last month' delivered as a chart-backed Slack update.
- Executive Briefings: Automatic morning briefs summarizing revenue, pipeline and support trends.
- Support Triage: Scan tickets and emails daily, categorize issues, post the queue and summarize recurring problems.
- Meeting Prep: Before an important meeting, pull attendee info, company context and the last email thread into one brief.
- Customer Success: Group customer signals from support, email and Slack into themes, save recommended follow-ups to Notion.
- Deliverables from Chat: Ask Scarlett for a marketing strategy PDF from a meeting recap and receive the file in the thread.