How do their growth rates compare?

Dex by Thirdlayer has a month-over-month growth rate of +9.5%; Neckium has —.

How does pricing compare?

Dex by Thirdlayer: Freemium. Freemium with an onboarding-based entry point. The site invites users to install Dex and then book an onboarding call; the vendor also mentions talking to them about private cloud, which is typically an enterprise conversation. No public price list is published, so check the site for current plan details. Neckium: Free. Neckium is completely free to install and use from the Chrome Web Store. There are no in-app purchases, subscriptions, or premium tiers advertised.

What are alternatives to Dex by Thirdlayer and Neckium?

Other tools in related categories include Monica, Sider, Merlin AI, Dia Browser, Tabbit Browser.

Dex by Thirdlayer vs Neckium — Traffic (9.26K vs 0), Pricing & Verdict

Open AI Tools

Dex by Thirdlayer vs Neckium — Traffic (9.26K vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Dex by Thirdlayer	Neckium
Official Domain	joindex.com	chromewebstore.google.com
Pricing Model	Freemium	Free
Monthly Visits	9.26K (9,262)	0 (0)
MoM Traffic Delta	+803 (+9.5%)	0 (—)
Primary Market & Share	🇺🇸 United States (85.7%)	🌐 Global (—)
Direct Visits / mo	5.75K	0
User Rating	4.3	3.8
Supported Platforms	Website	Browser Extension

Dex by Thirdlayer

The self-driving workspace that remembers everything about your operations

Operational Graph

A living organisational record that organises every message, meeting, deal update and workflow event into entities, relationships, timelines and dependencies.

Knowledge Manual

An editable, automatically maintained layer for priorities, open loops, SOPs and operating principles — the judgment side of your assistant.

Autonomous agents

Agents that orchestrate across Gmail, Slack, CRM and 20+ tools, triggered by events or on a schedule.

Browser control

Dex can navigate tabs, fill forms and complete tasks directly in your browser, cutting context switching.

Strengths & Pros

+Differentiated memory model that separates factual retrieval from judgment-based reasoning
+Browser-first design means it works where your context already lives
+Acts as well as answers: agents execute tasks across Gmail, Slack, CRM and more
+Context is portable via SDK and MCP rather than locked inside one chat window
+Enterprise options including private cloud, 256-bit encryption and full data control