Best AI RAG & Memory Tools (2026)

Brain

AI Agents

Brain is a governed AI knowledge platform for companies. It connects the tools your team already uses, and lets your people and your AI agents ask questions across that knowledge — where every answer respects existing permissions and every access is recorded.

Sentience

AI Agents

Sentience creates a unique model of your mind: an AI that remembers everything, thinks like you, and operates alongside you. It turns your email, meetings, messages, and screen into one private, encrypted memory you own.

Polygres

RAG & Memory

Make Reality Queryable. Polygres combines PostgreSQL hosting with native graph traversal, HNSW vector search, and hybrid retrieval APIs. The all-in-one database platform.

Hivemind

RAG & Memory

One command, every agent. Persistent shared memory for Claude Code, OpenClaw, Codex, Cursor, Hermes, and pi. Install with npm and Hivemind auto-detects every assistant on your machine.

Unabyss

RAG & Memory

The universal context layer for AI. Self-updating, available via MCP to every agent and LLM you use, segmented by default.

ZeroEntropy

RAG & Memory

ZeroEntropy trains small, specialized AI models — state-of-the-art rerankers, embeddings, and custom-trained models for production AI systems. Higher accuracy, lower latency, lower cost than the generalist alternatives.

AgentMemory

RAG & Memory

#1 Persistent memory for AI coding agents based on real-world benchmarks - rohitg00/agentmemory

Onyx AI

RAG & Memory

The open-source AI enterprise search platform that helps teams find information across all company data.

Airweave

RAG & Memory

Airweave is an open-source context retrieval layer that lets AI retrieve relevant context from apps and databases by acting as a shared information retrieval layer between AI systems and data sources.

HydraDB

RAG & Memory

Context infrastructure that makes your AI intelligent, stateful, and amazing.

ByteRover

RAG & Memory

A memory layer to persist structured, evolving knowledge across agents, with up to 92.19% retrieval accuracy - best on the market.

CogniMemo

RAG & Memory

CogniMemo is a universal, AI-powered memory infrastructure that helps AI systems remember context, learn from past interactions, and improve over time. Built to work across any model, product, or stack, with user-controlled, permission-based memory.

Pieces

RAG & Memory

Pieces is your AI companion that captures live context from browsers to IDEs and collaboration tools, manages snippets and supports multiple llms - all while processing data locally for maximum control.

Ragie

RAG & Memory

Ragie is a fully managed RAG-as-a-Service platform. Launch RAG pipelines for LLMs—agents, retrieval with citations, real-time indexing. Free developer tier.

Cognee

RAG & Memory

Cognee is an open source AI memory engine. Try it today to find hidden connections in your data and improve your AI infrastructure.

Pulse

RAG & Memory

Pulse understands your complex data

MemGPT

RAG & Memory

LLMs with self-editing memory for unbounded context

Mem0

RAG & Memory

Mem0 is a self-improving memory layer for LLM applications, enabling personalized AI experiences that save costs and delight users.

Zep

RAG & Memory

Equip your agents with the knowledge to complete tasks, from the mundane to monumental.

Weaviate

RAG & Memory

Bring AI-native applications to life with less hallucination, data leakage, and vendor lock-in

Milvus

RAG & Memory

Open-source vector database built for GenAI applications. Install with pip, perform high-speed searches, and scale to tens of billions of vectors.

Qdrant

RAG & Memory

Qdrant is an Open-Source Vector Database and Vector Search Engine written in Rust. It provides fast and scalable vector similarity search service with convenient API.

Chroma

RAG & Memory

Chroma is the open-source AI application database. Batteries included.

Letta

RAG & Memory

Advancing the frontier of AI systems with memory

Guru

RAG & Memory

Guru seamlessly connects your chats, apps, and docs into one single source of truth with our all-in-one knowledge platform for enterprise search, knowledge base, wiki, and intranet.