# Dex by Thirdlayer vs Memdex

Dex by Thirdlayer records 9,262 monthly visits with +9.5% month-over-month growth and Freemium pricing. Memdex records 0 monthly visits with -100% growth and Freemium pricing.

| Metric | [Dex by Thirdlayer](https://openaitools.app/tool/dex-by-thirdlayer) | [Memdex](https://openaitools.app/tool/memdex) |
| :--- | :--- | :--- |
| Website URL | https://joindex.com | https://memdex.ai |
| Categories | AI Browsers, AI Assistant, AI Task Management | AI Productivity Tools, AI Assistant, AI Knowledge Base |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 9,262 | 0 |
| MoM Growth Rate | +9.5% | -100% |
| Primary Market | United States | Global |
| Direct Visits | 5,753 | 0 |
| Review Score | 4.3 | 4 |
| Saved Count | 0 | 0 |
| Supported Platforms | Website | Website |

## Dex by Thirdlayer

Dex is built around the idea that agents fail when they only retrieve facts. Instead of a shallow search layer, Dex assembles two linked memory systems: an Operational Graph that records entities, relationships, timelines and dependencies across your operations, and a Knowledge Manual that holds the judgment layer — priorities, open loops, relationship context, SOPs and operating principles. The manual is explicitly editable and automatically maintained, so you stay in control of what the AI treats as true.

On top of that context, Dex runs autonomous agents that orchestrate across Gmail, Slack, CRM systems and 20+ other tools, triggered by events or schedules. Because it lives in the browser, it can also act directly in the page: navigating tabs, filling forms and completing work where the context already exists. Your operational context is portable too — an SDK and MCP support let you bring it into other agents and workflows.

Dex also improves with use. It learns from your corrections, approvals and repeated patterns. A Dreamer Agent reasons around the clock over new data to spot emerging patterns and keep your knowledge base current, while a Skill Builder Agent proposes custom automations each week based on the workflows you repeat. Typical wins include meeting prep with full history, follow-ups drafted from call notes, task triage that reflects your priorities, and CRM updates without manual data entry. Dex is available on Chrome (with iMessage, Slack and desktop clients listed as coming soon), offers 256-bit encryption, and supports private cloud deployment for teams that need data isolation.

**Pricing & Plans:** 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.

- **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.
- **Dreamer and Skill Builder agents:** One reasons 24/7 over new data to keep context current; the other proposes custom automations weekly from your repeated workflows.
- **SDK and MCP access:** Bring your operational context into any other agent, tool or workflow you already use.

**Strengths:** 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

**Limitations:** Onboarding is currently invite/call-based rather than fully self-serve; Requires connecting several tools and some ramp-up before the context compounding pays off; No public price list, so budgeting requires contacting the vendor; Some clients (iMessage, Slack, desktop) are still listed as coming soon

[Profile (Markdown)](https://openaitools.app/tool/dex-by-thirdlayer.md)

## Memdex

Memdex addresses a very practical daily annoyance: your best prompts, project background, and decisions are scattered across dozens of separate AI chats that each forget everything the moment you open a new thread. Instead of re-explaining your stack, your style, or your constraints every single time, Memdex builds a personal memory layer that travels with you between AI tools.

The extension auto-saves your conversations as you work, indexes them into a searchable local library, and then injects the relevant slices of context into whatever chat window you happen to be using. Because the memory store lives on your own device, the promise is that your private work discussions never get shipped off to a third-party server just to be remembered.

It is aimed at developers, writers, researchers, and power users who juggle several models at once and want continuity rather than cold starts. The trade-off is familiar for local-first tools: you get privacy and control, but the quality of retrieval depends on how consistently you use and curate the extension.

**Pricing & Plans:** Freemium. The extension is installable and usable without payment, with a free tier covering core saving and recall. A paid tier is offered for heavier usage; check the official site for current limits and prices since exact figures are not published on the homepage.

- **Automatic conversation capture:** Your chats in ChatGPT, Claude, Gemini and other AI tools are saved in the background without you having to copy-paste anything.
- **Local-first storage:** Memories are kept on your own device, so sensitive project context stays under your control rather than in a vendor cloud.
- **Context injection:** Pull a previous conversation, snippet, or project brief straight into a new chat so the model starts with your background already loaded.
- **Searchable memory library:** Browse and search everything you have saved to find that one prompt or decision you half-remember.
- **Multi-tool portability:** Move context between different AI assistants, so switching models doesn't mean starting from zero.

**Strengths:** Saves AI conversations automatically so you never lose a good prompt; Local storage model appeals to privacy-conscious users; Works across several major AI assistants instead of locking you into one; Injected context cuts down on repetitive re-explaining

**Limitations:** Retrieval quality depends on consistent curation of your memory bank; Requires installing and trusting a browser extension with your chat data; Exact free-tier limits and paid pricing are not clearly published on the homepage

[Profile (Markdown)](https://openaitools.app/tool/memdex.md)

## Frequently Asked Questions

### How do Dex by Thirdlayer and Memdex compare in monthly traffic?

Dex by Thirdlayer has 9,262 monthly visits, while Memdex has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Dex by Thirdlayer has a month-over-month growth rate of +9.5%; Memdex has -100%.

### 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. Memdex: Freemium. Freemium. The extension is installable and usable without payment, with a free tier covering core saving and recall. A paid tier is offered for heavier usage; check the official site for current limits and prices since exact figures are not published on the homepage.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 2 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 3 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 4 | [Dia Browser](https://openaitools.app/tool/dia-browser) | 1,254,172 | +108.4% | Free | The AI browser that reads between your tabs | [.md](https://openaitools.app/tool/dia-browser.md) |
| 5 | [Tabbit Browser](https://openaitools.app/tool/tabbit-ai) | 670,981 | -30.2% | Freemium | The agentic AI browser that reads your tabs, files, and screenshots as context | [.md](https://openaitools.app/tool/tabbit-ai.md) |
| 6 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 7 | [AI Toolbox](https://openaitools.app/tool/chatgpt-toolbox) | 290,140 | +16.9% | Freemium | Organize, search and export your AI chats across ChatGPT, Gemini, Claude and Grok | [.md](https://openaitools.app/tool/chatgpt-toolbox.md) |
| 8 | [mymind](https://openaitools.app/tool/mymind) | 221,816 | -1% | Free Trial, Paid | A private, visual AI space to save and remember anything — no folders, no tagging | [.md](https://openaitools.app/tool/mymind.md) |
| 9 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Summarize, bookmark and write with AI right in your browser | [.md](https://openaitools.app/tool/kome-ai.md) |
| 10 | [Mem.ai](https://openaitools.app/tool/mem-ai) | 137,457 | -1.2% | Freemium, Paid | An AI notes app that organizes your knowledge for you | [.md](https://openaitools.app/tool/mem-ai.md) |

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Source: https://openaitools.app/compare/dex-by-thirdlayer-vs-memdex

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