Second Brain

Second Brain is a self-hosted memory layer that gives Claude, ChatGPT, Cursor, and any MCP-compatible AI client persistent memory across sessions.

Store notes, decisions, and context once. Recall them by meaning not keywords using semantic vector search. Includes a web UI for browsing and managing memories, an Obsidian plugin for syncing your vault, and capture tools for browser and iOS.

Built on Cloudflare Workers, D1, Vectorize, and Workers AI. Runs entirely on the free tier. One-click deploy provisions everything in your own Cloudflare account. Your data never touches a third party after setup.

Features semantic search via vector embeddings, time decay reranking, duplicate detection, and an append tool for updating existing memories without creating conflicts.

MIT licensed. Open source.

Features

Semantic vector search with time decay reranking
Obsidian plugin, web dashboard, iOS Shortcuts, browser bookmarklet
One-click deploy on Cloudflare free tier
Duplicate detection and smart chunking for long notes
Web dashboard to browse, search, and manage memories

Project Samples

Project Activity

See All Activity >

Follow Second Brain

Second Brain Web Site

Other Useful Business Software

Build Agents and Models on One Platform

Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.

Try It Free

Rate This Project

User Reviews

Be the first to post a review of Second Brain!

Additional Project Details

User Interface

Web-based

Registered

2026-05-18

Similar Business Software

Queryra

Queryra is an AI-powered semantic search plugin for WordPress and WooCommerce. It replaces default keyword matching with intelligent search that understands what customers mean. When someone searches "gift for dad who likes gardening", default WooCommerce search returns 0 results. Queryra...

See Software
Couchbase

Couchbase’s operational data platform for AI is a scalable foundation for enterprise operational, analytical, mobile and AI workloads that replaces legacy infrastructure and data services. Bring your data to life in new ways with Couchbase’s enterprise data partnership: launch game-changing...

See Software
Site Search 360

Site Search 360 is a smart, ad-free search bar for your website. With a simple drag-and-drop integration, get your search up and running in no time! Let your visitors find exactly what they are looking for, right away. Features of Site Search 360 include: - Quick and easy visual...

See Software
Asimov

Asimov is a foundational AI-search and vector-search platform built for developers to upload content sources (documents, logs, files, etc.), auto-chunk and embed them, and expose them via a single API to power semantic search, filtering, and relevance for AI agents or applications. It removes...

See Software
Mistral AI

Mistral AI is a pioneering artificial intelligence startup specializing in open-source generative AI. The company offers a range of customizable, enterprise-grade AI solutions deployable across various platforms, including on-premises, cloud, edge, and devices. Flagship products include "Le...

See Software
Microsoft Purview

Microsoft Purview is a unified data governance service that helps you manage and govern your on-premises, multicloud, and software-as-a-service (SaaS) data. Easily create a holistic, up-to-date map of your data landscape with automated data discovery, sensitive data classification, and...

See Software