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.
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.
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.
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.
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.
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.
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.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| MemOS | Free | Agent Memory & RAG-as-a-Service | Memory operating system for LLM agents with hybrid retrieval and persistent memory |
| RAGFlow | Free | Agent Memory & RAG-as-a-Service | Open-source RAG engine with deep document parsing and agent workflows |
| Basic Memory | Free | Agent Memory & RAG-as-a-Service | MCP server that stores AI conversation memory as local Markdown notes |
| Cognee | Free | Agent Memory & RAG-as-a-Service | Open-source memory platform that turns data into a knowledge graph plus vectors for agents |
| Graphiti | Free | Agent Memory & RAG-as-a-Service | Framework for building real-time temporal knowledge graphs for AI agents |
| LightRAG | Free | Agent Memory & RAG-as-a-Service | Simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025) |
| Memvid | Free | Agent Memory & RAG-as-a-Service | Packs agent memory into a single portable file with no server or database |
| Letta | Freemium | Agent Memory & RAG-as-a-Service | Free BYOK plan supporting up to 3 stateful agents |
| Mem0 | Freemium | Agent Memory & RAG-as-a-Service | Free Hobby tier: unlimited end users, 10K add / 1K retrieval requests/month |
| Memori | Freemium | Agent Memory & RAG-as-a-Service | LLM-agnostic memory layer that captures agent context as structured state |
| Supermemory | Freemium | Agent Memory & RAG-as-a-Service | Free monthly usage allowance plus a Supermemory MCP server |
| Zep | Freemium | Agent Memory & RAG-as-a-Service | Free plan: 10,000 monthly credits, 2 projects, 200ms retrieval |