mem0

AI memory system for conversational agents and LLM applications

FAILEDAI Build

Pricing

Freemium

Learning curve

Moderate

Time to value

Immediate

BEST FORSoloSmall Team

WORKS FOR

storing semantic facts and user preferences for AI agents, managing conversational context for agents

KEY INSIGHT

It stores user facts and context well but may not enable agents to learn from their mistakes.

DOESN'T WORK FOR

helping agents learn from and avoid repeating past task failures

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What people reported, in their own words. Every line links to where it was said.

“every AI memory system I tried (mem0, Cognee, Zep) makes 2-3 LLM API calls just to store a single memory. All of them need OpenAI keys.”
NEGATIVE · performance · Hacker News · 2026-02-28
“I patched mem0 upstream to support OAT token reuse (PR #4035)”
MIXED · features · Hacker News · 2026-02-19
“Mem0 is not a good external memory just yet - I get intermittent 500 errors there”
NEGATIVE · reliability · Reddit · 2025-05-11
“We have been working on this problem at Mem0 to solve the long-term memory problem with LLMs”
POSITIVE · features · Hacker News · 2024-09-05
“With Memory Mem0.ai I know that you like to collect records from New Orleans artists, and you enjoy running. Relevancy: 9/10”
MIXED · features · Hacker News · 2024-09-04