100 Best Open-Source Memory & Knowledge in 2026 (Ranked by GitHub Activity)

A high-throughput and memory-efficient inference and serving engine for LLMs

Hindsight: Agent Memory That Learns

Open-source RAG engine combining knowledge retrieval and agent capabilities for LLMs

Knowledge Engine for AI Agent Memory in 6 lines of code

Local tool that parses code, docs, SQL schemas, configs, and PDFs into a queryable knowledge graph

Open-source platform for building, scheduling, and managing collaborative AI agent teams

The agent engineering platform

Transforms complex documents like PDFs into LLM-ready markdown/JSON for your Agentic workflows.

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Production-ready platform for agentic workflow development.

Captures and compresses agent activity to provide relevant context across coding sessions

Low-code multi-agent AI framework for planning, research, coding, and cross-platform delivery

Open-source CLI and library for evaluating and red-teaming prompts, agents, RAG systems, and LLM apps

An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together

Open-source agent harness for long-horizon research, coding, and content creation

Self-evolving Context Database for AI Agents. Unify Agent Memory, Knowledge RAG and Skills.

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

Graph-Native Infrastructure for Context and Accountable AI Systems

Universal memory layer for AI Agents

Build resilient language agents as graphs.

The all-in-one AI productivity accelerator. On device and privacy first with no annoying setup or configuration.

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

Open-source cloud-native vector database for semantic search, filtering, RAG, and reranking

Open-source AI orchestration framework for modular RAG pipelines and agent workflows

The open-source LLMOps platform: prompt playground, prompt management, LLM evaluation, and LLM observability all in one place.

Open-source metadata platform for trusted data context, lineage, semantics, and organizational memory

⚡️ GenBI (Generative BI) queries any database in natural language, generates accurate SQL (Text-to-SQL), charts (Text-to-Chart), and AI-powered business intelligence in seconds.

Open-source Java library with unified APIs for integrating LLMs and vector databases into applications

Shared memory server that turns conversations, documents, and code into reusable memory assets for AI agents

[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation

Memory and context engine + app that is extremely fast, scalable, and can be run fully locally. The Memory API for the AI era.

The best-benchmarked open-source AI memory system. And it's free.

Vector similarity search engine and database written in Rust, with payload filtering and managed cloud service

Dolt – Git for Data

Build Real-Time Knowledge Graphs for AI Agents

Memory OS for LLMs and AI agents with graph-structured, multimodal storage and retrieval

LlamaIndex is the leading document agent and OCR platform

AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework

One portable memory layer for every AI agent: local-first, Markdown-native, user-owned, and self-evolving across apps, tools, and workflows.

Data infrastructure for AI

Convert documentation websites, GitHub repositories, and PDFs into Claude AI skills with automatic conflict detection

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

Private AI platform for agents, assistants and enterprise search. Built-in Agent Builder, Deep research, Document analysis, Multi-model support, and API connectivity for agents.

Open-source AI knowledge base and MCP/A2A management platform with admin UI, user management, and SSO

A library for efficient similarity search and clustering of dense vectors.

Open-source platform for AI agent tracing, evaluations, guardrails, prompts, and GPU monitoring

A lightweight, lightning-fast, in-process vector database

Open-source, cloud-native distributed SQL database with ACID, horizontal scaling, HTAP, and vector search

Open-source ETL for converting documents into structured data for language models

💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows

open-source agentic AI data assistant for the next generation of AI + Data products.

Local vector database for private RAG using graph-based selective recomputation

Open-source vector similarity search for Postgres

LLM-agnostic memory infrastructure that turns agent execution and conversations into persistent state

Incremental engine for long horizon agents 🌟 Star if you like it!

Python scraper based on AI

A modular graph-based Retrieval-Augmented Generation (RAG) system

Open-source collection of 818 cybersecurity skills for AI agents, mapped to six frameworks

https://arxiv.org/abs/2606.28344. The end of web parsing. The beginning of scalable pixel-native search. link: https://pixelrag.ai/

WFGY is an open-source AI Troubleshooting Atlas for RAG, agents, and real-world AI workflows. Includes the 16-problem map, Global Debug Card, and WFGY 3.0. ⭐ Star to help more builders find this repo.

Build AI Agents, Visually

Harness LLMs with Multi-Agent Programming

Letta is the platform for building stateful agents: AI with advanced memory that can learn and self-improve over time.

Distilly — Distill how they think into reusable Skills for any Agent or Bot. Formerly Colleague Skill（原同事 Skill）.

Personal memory across agents

Modular Python framework for AI agents and workflows with chain-of-thought reasoning, tools, and memory.

Scalene: a high-performance, high-precision CPU, GPU, and memory profiler for Python with AI-powered optimization proposals

A vector index built on TurboQuant, written in Rust with Python bindings

Semantic cache for LLMs. Fully integrated with LangChain and llama_index.

Memory layer for AI Agents. Replace complex RAG pipelines with a serverless, single-file memory layer. Give your agents instant retrieval and long-term memory.

AI agent microservice

Practical course about Large Language Models.

Desktop multi-agent harness with visual workflows, built with Rust, Tauri, React, and langgraph-rust

Superagent protects your AI applications against prompt injections, data leaks, and harmful outputs. Embed safety directly into your app and prove compliance to your customers.

An LLM-powered knowledge curation system that researches a topic and generates a full-length report with citations.

Unified framework for building enterprise RAG pipelines with small, specialized models

Build LLM-powered applications in Ruby

Agent Framework For Fintech and Banks

An open-source RAG-based tool for chatting with your documents.

Everything you need to know to build your own RAG application

Open-source Python library for agentic RAG across public GitHub code, issues, and repository information

Offline-deployable Chinese knowledge base Q&A with RAG and agents using LangChain and open-source LLMs

🤖 Chat with your SQL database 📊. Accurate Text-to-SQL Generation via LLMs using Agentic Retrieval 🔄.

An opinionated RAG framework for integrating GenAI into apps with multiple LLMs and file formats

Chat with your database or your datalake (SQL, CSV, parquet). PandasAI makes data analysis conversational using LLMs and RAG.

AI agent automation platform for natural-language workflows across multiple AI providers and services

<⚡️> SuperAGI - A dev-first open source autonomous AI agent framework. Enabling developers to build, manage & run useful autonomous agents quickly and reliably.

SoTA production-ready AI retrieval system. Agentic Retrieval-Augmented Generation (RAG) with a RESTful API.

Crawl a site to generate knowledge files to create your own custom GPT from a URL

Retrieval Augmented Generation (RAG) chatbot powered by Weaviate

Fractal Graph-of-Thought. Rhizomatic Mind-Mapping for Ai-Agents, Web-Links, Notes, and Code.

ImageBind One Embedding Space to Bind Them All

Large Action Model framework to develop AI Web Agents

The Open Source Memory Layer For Autonomous Agents

Easily compute clip embeddings and build a clip retrieval system with them

Self-improving Claude 3.5 Sonnet assistant that dynamically creates and manages tools for software development

The easiest way to use Agentic RAG in any enterprise

🧠 Second Brain AI agent

The open source platform for AI-native application development.