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Head to head · 2026

LangChain vs Mem0

Pricing, free plans, ratings, features, pros and cons, side by side. Where one comes out ahead, we mark it.

LangChain

The open-source framework behind 90 million monthly downloads and 35% of the Fortune 500

4.4Free

Visit LangChain (opens LangChain in a new tab)

Mem0

Open-source memory layer that lets AI agents retain and recall context across sessions

4.2$19/mo

Visit Mem0 (opens Mem0 in a new tab)

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

  • Lower starting price

    Not comparable

    Not comparable: LangChain does not list a price

  • Free plan

    Tie

    Both have one

  • Higher rating

    LangChain

    4.4 against 4.2

  • Same job?

    Yes

    Both are AI Infrastructure & Agent Tooling tools

Side by side

Compared onLangChainMem0
Our rating4.4Better4.2
Starts atFree$19/mo
Free planYesYes
CategoryAI Infrastructure & Agent ToolingAI Infrastructure & Agent Tooling
Plans
  • Developer$0/seat/mo
  • Plus$39/seat/mo
  • EnterpriseCustom
From $19/mo
Key features
  • Standard building blocks for chains, retrieval, memory, and tool calling
  • Free, open-source core framework with a massive existing ecosystem
  • 90 million combined monthly downloads with LangGraph as of 2026
  • 35% of the Fortune 500 reported building on LangChain's tooling
  • $260M raised total, $1.25B valuation as of October 2025
  • Selective memory extraction instead of full conversation-history storage
  • Open-source core with a hosted cloud API option
  • Cross-session personalization for AI assistants and agents
  • Integrations with LangGraph, CrewAI, and AWS Agent SDK
  • Browser extension for capturing memories across ChatGPT, Perplexity, and Claude
Pros
  • Free, open-source core with no licensing cost for the framework itself
  • Massive adoption means abundant documentation, examples, and community support
  • Foundational building blocks reduce repetitive LLM-application plumbing
  • Open-source core gives developers a self-hosted option alongside the managed API
  • Backing from Y Combinator, Peak XV, and the GitHub Fund signals strong investor confidence
  • Default memory provider status on AWS's Agent SDK gives it built-in distribution
Cons
  • Production observability and hosted deployment require separate paid products
  • Broad, general-purpose scope can mean more setup than a narrower, purpose-built tool
  • Fast-moving library with frequent updates can require ongoing maintenance
  • Selective-memory approach can miss context a full-window approach would have caught
  • Pricing jumps sharply between the Growth ($79) and Pro ($249) tiers
  • Young company (2024) still proving long-term retention accuracy at scale
CompanyLangChain, founded 2022Mem0, founded 2024

Prices come from each vendor's pricing page, last checked 20260805. Check the vendor before you buy.

FAQ

Questions people ask

Is LangChain better than Mem0?

In our reviews LangChain scores 4.4 and Mem0 scores 4.2. The better pick depends on the job. LangChain: The open-source framework behind 90 million monthly downloads and 35% of the Fortune 500. Mem0: Open-source memory layer that lets AI agents retain and recall context across sessions.

Which is cheaper, LangChain or Mem0?

LangChain: free. Mem0: from $19/mo.

Do LangChain and Mem0 have free plans?

Yes, both have a free plan.

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