Letta is listed under Agent Memory & RAG-as-a-Service, in the AI Agents & Automation category on Flocci AI Tools. Free BYOK plan supporting up to 3 stateful agents. It is freemium — a usable free tier with paid plans above it, and it lives at letta.com.
Letta is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
Letta does 3 things the catalog singles out: Free byok plan supporting up to 3 stateful agents; stateful-agent runtime with persistent memory, desktop app, cli and api; open-source framework (formerly memgpt) plus a managed cloud.
Mem0 is the closest free alternative: it sits in the same Agent Memory & RAG-as-a-Service sub-category and is free tier + paid plans. Ragie, Supermemory and Zep also start free. The full list is on the alternatives page.
See the full list →