# The best free AI agent memory and RAG services Every option in the catalog for when you need to give an assistant durable memory across sessions — 12 AI agent memory and RAG services, 12 of them free or freemium, with the pricing tier printed on every row. ## Stats - 12 tools listed - 12 free or freemium - 7 with no paid plan at all - 1 sub-categories covered ## FAQ ### What are the best free AI agent memory and RAG services? Flocci AI Tools lists 12 of them, ordered free tiers first: MemOS, RAGFlow, Basic Memory, Cognee and Graphiti. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score. ### Which of these are completely free? 7 on this page are marked fully free with no paid plan at all: MemOS, RAGFlow, Basic Memory, Cognee and Graphiti. The remaining 5 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up. ### How is this list ordered? Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else. ## Quick picks ### Which AI agent memory and RAG services work in a browser with no install? MemOS, RAGFlow, Letta, Mem0 and Memori all work in a browser tab with no install needed — just open the site and go. 7 of the 12 free AI agent memory and RAG services listed here are browser-based. ### Which AI agent memory and RAG services let you sign in with Google? Mem0, Memori and Supermemory support Google sign-in, so you can start without creating a new account. That's 3 of the 12 free AI agent memory and RAG services on this page. ### Which AI agent memory and RAG services can you self-host or run offline? Basic Memory, Graphiti, LightRAG and Memvid can be self-hosted or run locally without a browser — useful for privacy, air-gapped networks, or avoiding API rate limits. 4 of the 12 free AI agent memory and RAG services here run offline. ## Tools - [MemOS](https://aitools.flocci.in/tool/memos) — Free — Memory operating system for LLM agents with hybrid retrieval and persistent memory - [RAGFlow](https://aitools.flocci.in/tool/ragflow) — Free — Open-source RAG engine with deep document parsing and agent workflows - [Basic Memory](https://aitools.flocci.in/tool/basic-memory) — Free — MCP server that stores AI conversation memory as local Markdown notes - [Cognee](https://aitools.flocci.in/tool/cognee) — Free — Open-source memory platform that turns data into a knowledge graph plus vectors for agents - [Graphiti](https://aitools.flocci.in/tool/graphiti) — Free — Framework for building real-time temporal knowledge graphs for AI agents - [LightRAG](https://aitools.flocci.in/tool/lightrag) — Free — Simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025) - [Memvid](https://aitools.flocci.in/tool/memvid) — Free — Packs agent memory into a single portable file with no server or database - [Letta](https://aitools.flocci.in/tool/letta) — Freemium — Free BYOK plan supporting up to 3 stateful agents - [Mem0](https://aitools.flocci.in/tool/mem0) — Freemium — Free Hobby tier: unlimited end users, 10K add / 1K retrieval requests/month - [Memori](https://aitools.flocci.in/tool/memori) — Freemium — LLM-agnostic memory layer that captures agent context as structured state - [Supermemory](https://aitools.flocci.in/tool/supermemory) — Freemium — Free monthly usage allowance plus a Supermemory MCP server - [Zep](https://aitools.flocci.in/tool/zep) — Freemium — Free plan: 10,000 monthly credits, 2 projects, 200ms retrieval --- Source: Flocci AI Tools — https://aitools.flocci.in/best/best-agent-memory-rag-as-a-service Facts last verified: October 2026