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Mem0

Mem0

Freemium

Open-source memory layer that gives AI agents persistent, personalized memory across conversations.

Best for: customer-facing ai assistants that personalize responses based on user history, sales and support agents that remember customer preferences, past issues, and context

★★★★☆4.4870 aggregate ratings

Verified by editorial·Last updated: November 2026·How we rank

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Editor's verdict

Mem0 is a solid freemium pick, rated 4.4/5 by 870 users. Best for customer-facing ai assistants that personalize responses based on user history and sales and support agents that remember customer preferences, past issues, and context. Standout: automatic memory extraction from conversations - no need to define what to remember. Watch out: memory extraction uses an additional LLM call per turn, adding latency and cost. Has a free tier; paid plans start at $24/mo.

About Mem0

Mem0 (pronounced "mem-zero") is an open-source memory infrastructure layer for AI agents and assistants. It solves a fundamental limitation in LLM-based agents: they forget everything between sessions. Each conversation starts from scratch, requiring users to re-explain context and preferences that were stated in prior sessions. Mem0 adds a persistent memory layer that extracts, stores, and retrieves relevant facts about the user - preferences, past decisions, stated goals, context about their work - and injects the most relevant memories into the LLM context at the start of each session. The extraction is automatic: rather than requiring the application to decide what to remember, Mem0 passes conversation turns through an LLM extraction step that identifies memory-worthy facts and stores them in a vector database with metadata. Memory retrieval uses semantic search to surface the most contextually relevant memories at query time, not the most recent. This is the same mechanism that makes human assistants better over time: they remember what matters about you. The managed cloud version (mem0.ai) handles storage and retrieval without the team running their own vector database. The open-source version integrates with any vector store: Pinecone, Qdrant, Weaviate, or Supabase pgvector. Framework integrations cover LangGraph, CrewAI, OpenAI Assistants, and direct API. Pricing on the managed cloud starts at $24 per month for small applications, scaling by memory storage and retrieval volume. For teams building AI assistants, customer-facing agents, or personal productivity agents where the product improves through personalization, Mem0 is the most developer-friendly memory layer available.

Pros & Cons

Pros

  • ✓Automatic memory extraction from conversations - no need to define what to remember
  • ✓Semantic retrieval surfaces contextually relevant memories, not just the most recent ones
  • ✓Fully open source with integrations for Pinecone, Qdrant, Weaviate, and Supabase pgvector
  • ✓Works with LangGraph, CrewAI, OpenAI Assistants, and plain API calls
  • ✓Managed cloud option removes the need to self-host a vector database for memory storage

Cons

  • ✗Memory extraction uses an additional LLM call per turn, adding latency and cost
  • ✗Privacy-sensitive applications require careful data governance of what gets remembered
  • ✗Memory quality depends on extraction LLM quality - weaker models produce noisier memories
  • ✗Managed cloud pricing scales with storage volume, which can grow unpredictably at scale
  • ✗No built-in memory editing UI - reviewing and curating stored memories requires custom tooling

Best Use Cases

  • →Customer-facing AI assistants that personalize responses based on user history
  • →Sales and support agents that remember customer preferences, past issues, and context
  • →Personal productivity agents that learn user workflows, preferences, and recurring tasks
  • →AI companions and coaching tools where long-term memory is core to the product value
  • →Multi-session research agents that build on prior sessions without re-explaining context

Categories

ai-agentsai-assistantscode-ai

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Pricing

Free$0 / mo
ProFrom $24 / mo

Pricing verified November 2026. Verify current pricing on the official site before purchase.

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Editorial Score

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Editorial review pending

External Aggregate

4.4/5

870 aggregate ratings from G2, Capterra, Product Hunt

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Pricing Verified

November 2026

Re-verified against the official site every 90 days

Editorial score is independent of External Aggregate. User reviews appear separately below.

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Frequently Asked Questions

Is Mem0 free?▼

Mem0 offers a free tier with limited features. Paid plans start from $24/month.

What is Mem0 best for?▼

Mem0 is best suited for: Customer-facing AI assistants that personalize responses based on user history, Sales and support agents that remember customer preferences, past issues, and context, Personal productivity agents that learn user workflows, preferences, and recurring tasks.

How does Mem0 compare to alternatives?▼

Mem0 holds a rating of 4.4/5 from 870 reviews. Browse our comparison pages to see detailed side-by-side breakdowns against similar tools.

What does Mem0 cost?▼

Mem0 starts at $24/month and includes a free tier. Pricing may vary by plan and region - always verify on the official site.

MytheAi Team, editorial team at MytheAi

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Editorial Team

The MytheAi editorial team tracks and reviews AI and SaaS tools. We built MytheAi out of frustration with pay-to-rank listicles and SEO-driven directories that prioritize ad revenue over honest guidance. Hands-on testing across 620+ tools to date.

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Mem0 Review (2026): Is It Worth It?

Mem0 is a freemium tool with a free tier available. It holds a rating of 4.4/5 based on 870 reviews.

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