# Dex by Thirdlayer vs Tabbit Browser

Dex by Thirdlayer records 9,262 monthly visits with +9.5% month-over-month growth and Freemium pricing. Tabbit Browser records 670,981 monthly visits with -30.2% growth and Freemium pricing.

| Metric | [Dex by Thirdlayer](https://openaitools.app/tool/dex-by-thirdlayer) | [Tabbit Browser](https://openaitools.app/tool/tabbit-ai) |
| :--- | :--- | :--- |
| Website URL | https://joindex.com | https://www.tabbit.ai |
| Categories | AI Browsers, AI Assistant, AI Task Management | AI Browsers, AI Agent, AI Productivity Tools, AI Workflow |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 9,262 | 670,981 |
| MoM Growth Rate | +9.5% | -30.2% |
| Primary Market | United States | United States |
| Direct Visits | 5,753 | 567,355 |
| Review Score | 4.3 | 4.5 |
| 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)

## Tabbit Browser

Tabbit is an AI-native browser built around a simple premise: the browser should understand what you are working on, not just display it. Anything you bring in — open tabs, PDFs, bookmarks, highlighted HTML elements, screenshots, and local files — becomes context for a chat sidebar that can summarize, extract, translate, or act on it. Beyond chatting, Tabbit runs an Agent that plans and executes multi-step web actions, plus an optional CLI for developers.

A distinguishing feature is its library of Agentic Skills: prebuilt workflows for top sites that cover tasks such as triaging a video feed, pulling highlights from long podcasts, downloading Bilibili videos with subtitles, exporting ChatGPT threads to Markdown, extracting tables from research PDFs, explaining pull requests, and auditing subscriptions. Tabbit's agent can run several of these in a multi-agent pattern, and you can build and publish your own Skills. It connects to a very wide range of frontier models, routing each request only to the provider you select.

The company positions privacy as a core principle: highlights, chats, and saved pages stay on your machine, and it states that it does not sell user data or train on your reads. Tabbit is developed by LUMINALAB PTE. LTD. Free and Standard tiers cover most everyday browsing, with a paid Pro tier for heavy agent users and access to top-tier models.

**Pricing & Plans:** Freemium. The browser itself is free forever. A Free tier gives basic AI usage (x1), and setting Tabbit as your default browser unlocks the Standard tier with 10x usage at no cost. Pro is an optional paid plan at US$30.00 per month (billed monthly via Stripe) for 100x usage, top-tier models, full Agent capabilities, 10 scheduled tasks, larger context, and permanent task artifact retention.

- **Everything as context:** Drop in a tab, a file, a screenshot, or a highlighted element and the agent reads, plans, and runs on it — no copy-pasting between apps.
- **Agent and multi-agent web actions:** Automate multi-step tasks on real websites, including deep research, form filling, and data collection, with several agents working in parallel.
- **Agentic Skills library:** Ready-made Skills for the sites you actually use — video triage, podcast highlight extraction, PDF table export, PR explanations, subscription audits — plus a builder for your own.
- **Many frontier models, one browser:** Switch between a broad menu of leading models from multiple vendors, with your chosen model always shown at the top of the chat.
- **Privacy by design:** Highlights, chats, and saved pages stay on your machine, with no data selling and no training on your reads, under independently examined SOC 2 Type I controls.

**Strengths:** Free browser with a genuinely usable free tier and no-cost upgrade path; Agent and Skills turn passive browsing into completed work; Very broad model coverage with transparent routing to the selected provider; Privacy-focused design with local storage of highlights, chats, and saved pages

**Limitations:** Top-tier models and full Agent power sit behind the US$30/month Pro tier; Platform support is currently limited to macOS and Windows; Linux, iOS, and Android are still on the roadmap; Skill quality and reliability can vary by site, since some depend on third-party pages; Heavy agent usage on the free tiers is capped by the x1 and x10 usage allowances

[Profile (Markdown)](https://openaitools.app/tool/tabbit-ai.md)

## Frequently Asked Questions

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

Dex by Thirdlayer has 9,262 monthly visits, while Tabbit Browser has 670,981. 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%; Tabbit Browser has -30.2%.

### 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. Tabbit Browser: Freemium. Freemium. The browser itself is free forever. A Free tier gives basic AI usage (x1), and setting Tabbit as your default browser unlocks the Standard tier with 10x usage at no cost. Pro is an optional paid plan at US$30.00 per month (billed monthly via Stripe) for 100x usage, top-tier models, full Agent capabilities, 10 scheduled tasks, larger context, and permanent task artifact retention.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Manus](https://openaitools.app/tool/manus) | 19,195,779 | -1.7% | Free Trial | Delivers vastly more capable autonomous agent execution for complex goals, but operates as a cloud platform rather than a browser. | [.md](https://openaitools.app/tool/manus.md) |
| 2 | [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) |
| 3 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | Operates as a flexible browser sidebar across standard browsers rather than a dedicated AI browser client. | [.md](https://openaitools.app/tool/sider.md) |
| 4 | [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) |
| 5 | [Dia Browser](https://openaitools.app/tool/dia-browser) | 1,254,172 | +108.4% | Free | Offers a polished AI-native browsing experience with deep context synthesis, but lacks dedicated agentic web task automation. | [.md](https://openaitools.app/tool/dia-browser.md) |
| 6 | [Eigent AI](https://openaitools.app/tool/eigent-ai) | 575,703 | +1.4% | Freemium, Free Trial, Contact for Pricing | Provides open-source desktop AI automation across files and terminal tasks, but requires more manual setup than Tabbit. | [.md](https://openaitools.app/tool/eigent-ai.md) |
| 7 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Excels at precise data extraction and workflow automation using browser triggers, but functions as an extension. | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 8 | [ego (lite)](https://openaitools.app/tool/ego-lite) | 384,099 | +97.6% | Free | Free browser that lets AI agents run parallel web automation with your own logins | [.md](https://openaitools.app/tool/ego-lite.md) |
| 9 | [Sigma AI Browser](https://openaitools.app/tool/sigma-ai-browser) | 240,775 | -47.1% | Free | Includes offline local LLM support for privacy-focused users, but offers less advanced cross-tab agentic workflow automation. | [.md](https://openaitools.app/tool/sigma-ai-browser.md) |
| 10 | [Opera Neon](https://openaitools.app/tool/opera-neon) | 133,006 | -9.5% | Paid | An agentic browser built to act on your behalf | [.md](https://openaitools.app/tool/opera-neon.md) |

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

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