Letta is freemium — a usable free tier with paid plans above it. Mem0 is freemium — a usable free tier with paid plans above it. Both are listed under Agent Memory & RAG-as-a-Service, so this is a like-for-like comparison. Neither is ranked above the other — Flocci carries no sponsored placement.
Letta is freemium — a usable free tier with paid plans above it and is listed for free BYOK plan supporting up to 3 stateful agents. Mem0 is freemium — a usable free tier with paid plans above it and is listed for free Hobby tier: unlimited end users, 10K add / 1K retrieval requests/month. Both sit in Agent Memory & RAG-as-a-Service.
Neither — Letta and Mem0 are both freemium, so the choice comes down to capability rather than cost. Both entries list what they uniquely do above.
Choose Letta if you need free BYOK plan supporting up to 3 stateful agents; choose Mem0 if you need free Hobby tier: unlimited end users, 10K add / 1K retrieval requests/month. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.
| Letta | Mem0 | |
|---|---|---|
| Pricing tier | Free tier + paid plans | Free tier + paid plans |
| Free to start | Yes | Yes |
| Category | AI Agents & Automation | AI Agents & Automation |
| Type | Agent Memory & RAG-as-a-Service | Agent Memory & RAG-as-a-Service |
| Listed capabilities |
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| Tags | stateful agents, agent memory framework, letta cloud, mcp memory server, open source agents, free | agent memory, long term memory api, rag memory layer, persistent memory, llm memory, free |
| Website | letta.com | mem0.ai |
| Full page | Letta details → | Mem0 details → |
| Alternatives | Letta alternatives → | Mem0 alternatives → |