# MemBrain - AI-powered Second Brain vs Notion MemBrain - AI-powered Second Brain records 0 monthly visits with — month-over-month growth and Free pricing. Notion records 173,441,670 monthly visits with +0.1% growth and Freemium pricing. | Metric | [MemBrain - AI-powered Second Brain](https://openaitools.app/tool/membrain) | [Notion](https://openaitools.app/tool/t) | | :--- | :--- | :--- | | Website URL | https://chromewebstore.google.com/detail/membrain/eknbepndjmjchcbbcadobcmdnikkkbdg | https://www.notion.com | | Categories | AI Knowledge Management, AI Note Taker, AI Productivity Tools, AI Assistant | AI Agent, AI Assistant, AI Knowledge Base, AI Meeting Assistant | | Pricing Model | Free | Freemium | | Monthly Visits | 0 | 173,441,670 | | MoM Growth Rate | — | +0.1% | | Primary Market | Global | United States | | Direct Visits | 0 | 135,175,058 | | Review Score | 3.8 | 4.8 | | Saved Count | 0 | 0 | | Supported Platforms | Browser Extension | Website | ## MemBrain - AI-powered Second Brain MemBrain is a Chrome extension that places an AI assistant in the browser's side panel. Rather than switching tabs to a chat website, you can open the panel and talk to an AI model while the page you are reading stays visible next to it. It is positioned as a lightweight 'second brain' for research and browsing, and the project is open source. The extension focuses on flexible context. You can add one or more web pages, or selected passages of text, as references for the model, so answers are grounded in the material you are actually looking at rather than generic knowledge. It ships with integrations for several popular AI providers and models, and because it is built around standard API formats you can add further providers or models yourself. Prompt templates can also be saved so common tasks are one click away. Privacy is a stated design principle: the extension runs without any intermediary server and communicates directly with the model providers using the API keys you supply. According to the developer, it does not collect, store, or share personal information, browsing history, API keys, or chat history. MemBrain is distributed through the Chrome Web Store and is free to install. **Pricing & Plans:** Free. MemBrain itself is a free, open-source Chrome extension; costs come from the AI provider API usage you pay for directly with your own API keys. - **AI chat in the Chrome side panel:** Open an AI chat alongside the page you are reading, without navigating away or switching tabs. - **Web pages and text as context:** Attach one or more pages, or selected passages, as references so answers draw on your actual source material. - **Bring your own API keys:** Connect directly to providers such as OpenAI, Anthropic, and Google using your own keys, and add more providers that follow supported API formats. - **Reusable prompt templates:** Save prompt templates to run frequent tasks in a single click. - **No intermediary server:** The extension talks straight to model providers and, per the developer, does not collect or store your data, keys, or chat history. **Strengths:** Keeps AI chat in the browser side panel next to your content; Supports multiple AI providers through user-supplied API keys; Open source and, per the developer, operates without a backend server; Custom prompt templates and self-added models add flexibility **Limitations:** No bundled AI credits, so you must set up your own provider API keys; Very small install base, so community support and documentation are limited; Last listed update is v0.4, so the release cadence appears slow [Profile (Markdown)](https://openaitools.app/tool/membrain.md) ## Notion Notion started as a flexible document and note-taking tool and has grown into a full AI-native workspace used by individuals, startups, and large enterprises. It lets you build a single system of record where pages, databases, tasks, and wikis live together, then layer Notion AI on top so you can draft, summarize, translate, and query that content without leaving the app. The platform's newer direction centers on agents and enterprise search. Custom agents can be built to handle recurring workflows — triaging product feedback, resolving support tickets, or automating weekly reporting — while unified search pulls answers from Notion and connected apps with citations. Because everything is stored in the same structured workspace, AI has real context to work from. Notion is available on web, desktop, and mobile, and there is a generous free tier plus paid plans for individuals, teams, and enterprises. It is widely adopted, with the company reporting over 100 million users across more than 50 countries, and it is frequently used as a company-wide knowledge base and project hub. **Pricing & Plans:** Freemium model: a free plan covers personal use and small teams, with paid Personal, Team, Business, and Enterprise tiers plus AI add-ons. Larger organizations typically contact sales for custom pricing. - **Connected workspace:** Combine docs, wikis, projects, and databases into one structured system of record that stays linked as your content grows. - **Notion AI assistants and agents:** Draft, summarize, translate, and answer questions inline, or build custom agents that automate recurring workflows around the clock. - **Unified enterprise search:** Find answers instantly across Notion and connected apps, with citations so you can verify where each answer came from. - **Flexible databases and templates:** Use relations, rollups, views, and a large template gallery to model anything from a CRM to a content calendar. - **Cross-platform apps and integrations:** Work on web, desktop, and mobile, and connect the tools your team already uses through integrations and the public API. **Strengths:** Very flexible — docs, databases, and project management in one tool; Strong AI features for search, writing, and workflow automation; Generous free plan and broad template ecosystem; Available on web, desktop, and mobile with a mature API **Limitations:** Flexibility means setup time can be significant for teams; Advanced AI and enterprise features sit on higher-priced tiers; Large workspaces can feel slow or cluttered without good structure [Profile (Markdown)](https://openaitools.app/tool/t.md) ## Frequently Asked Questions ### How do MemBrain - AI-powered Second Brain and Notion compare in monthly traffic? MemBrain - AI-powered Second Brain has 0 monthly visits, while Notion has 173,441,670. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? MemBrain - AI-powered Second Brain has a month-over-month growth rate of —; Notion has +0.1%. ### How does pricing compare? MemBrain - AI-powered Second Brain: Free. Free. MemBrain itself is a free, open-source Chrome extension; costs come from the AI provider API usage you pay for directly with your own API keys. Notion: Freemium. Freemium model: a free plan covers personal use and small teams, with paid Personal, Team, Business, and Enterprise tiers plus AI add-ons. Larger organizations typically contact sales for custom pricing. ## Alternatives | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [Miro](https://openaitools.app/tool/miro) | 30,749,206 | +1.7% | Freemium, Contact for Pricing | Infinite visual canvas for brainstorming and diagramming, but less structured for text documents and wikis. | [.md](https://openaitools.app/tool/miro.md) | | 2 | [Tactiq](https://openaitools.app/tool/tactiq) | 6,521,542 | +4.1% | Freemium | Live meeting transcription and AI notes without a bot in the call | [.md](https://openaitools.app/tool/tactiq.md) | | 3 | [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) | | 4 | [Glean](https://openaitools.app/tool/glean) | 3,301,875 | +0.1% | Contact for Pricing | Powerful enterprise-wide search and knowledge discovery across apps, but lacks Notion's flexible doc creation. | [.md](https://openaitools.app/tool/glean.md) | | 5 | [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) | | 6 | [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) | | 7 | [Glasp](https://openaitools.app/tool/glasp) | 889,564 | -14.1% | Freemium | Highlight the web, learn in public, and build your AI clone | [.md](https://openaitools.app/tool/glasp.md) | | 8 | [Craft](https://openaitools.app/tool/craft-do) | 703,417 | +8.9% | Freemium | Superior block-based typography and mobile note-taking experience, but fewer robust database and automation features. | [.md](https://openaitools.app/tool/craft-do.md) | | 9 | [GitBook](https://openaitools.app/tool/the-new-gitbook) | 557,489 | -4.6% | Freemium | Excellent developer-focused documentation and Git synchronization, but lacks general database and task management. | [.md](https://openaitools.app/tool/the-new-gitbook.md) | | 10 | [Taskade](https://openaitools.app/tool/taskade) | 539,714 | -9.4% | Freemium | Built-in AI agents and automated workflows, but less refined document editing interface. | [.md](https://openaitools.app/tool/taskade.md) | --- Source: https://openaitools.app/compare/membrain-vs-t More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)