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Head-to-head · Llm Developer Tools

LangSmith vs LangChain

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score LangSmith #1 in Llm Developer Tools 9.4/10 Free plan Free plan✓ 0 of 3 features Visit LangSmith
LangChain #2 in Llm Developer Tools 9.3/10 Free plan Free plan✓ 1 of 3 features Visit LangChain

LangSmith leads on 0 checks, LangChain on 1, and 1 is even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreLangSmith · 9.4/10
  • Free planboth
  • Most featuresLangChain · 1 of 3

LangSmith scores higher on our rubric for llm developer tools: 9.4 against 9.3 out of 10; our editors rank them #1 and #2.

LangChain offers open source; LangSmith doesn't.

LangSmith is the better fit for teams needing complete LLM observability and evaluation. LangChain is the better fit for developers building agents and RAG applications.

  • LangSmith fits best

    Teams needing complete LLM observability and evaluation

  • LangChain fits best

    Developers building agents and RAG applications

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature LangSmith 9.4/10 Visit ↗ LangChain 9.3/10 Visit ↗
At a glance
Editor score 9.4 9.3
Ranking #1 in Llm Developer Tools #2 in Llm Developer Tools
Best for Teams needing complete LLM observability and evaluation Developers building agents and RAG applications
Pricing model Free plan + paid Free
Starting price $39/seat/mo Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Self-hosted
Support Community, Email, Tickets, Docs · 24/7 Community, Docs
Integrations 7 integrations 1,000+ integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features LangSmith 0/3 · LangChain 1/3
LLM evaluation Not checked yet Not checked yet
LLM observability Not checked yet Not checked yet
Open source — ✓ (best)
Specs
Deployment Both Not checked yet
LLM providers Not checked yet Not checked yet
SDK languages Not checked yet Not checked yet
Our review
Pros
  • Combines application tracing, evaluations, prompt versioning, and monitoring.
  • Tracks agent and tool calls and supports online and offline evaluations.
  • Offers cloud, hybrid, and self-hosted deployment options.
  • Pre-built agent architectures and templates support agent development.
  • Retrieval tools cover document processing, vector stores, and citations.
  • Integrations span models, tools, databases, and data sources.
Cons
  • Developer includes one seat and up to 5k base traces per month.
  • Developer and Plus charge pay-as-you-go after their included trace allowances.
  • Enterprise pricing is custom.
  • Deployment is self-hosted, so teams manage their own environment.
  • Support channels are limited to community and documentation.
  • Tracing, evaluation, and deployment workflows are associated with separate LangSmith.
Our verdict

LangSmith brings development, evaluation, and monitoring tools for LLM applications and agents into one platform. It is aimed at teams that want to inspect application traces, compare experiments, manage prompts, and monitor production…

Read the review →

LangChain is an open-source framework for developers building LLM applications and agents. It runs in application code and provides agent architectures, model and tool integrations, retrieval abstractions, vector-store support, document…

Read the review →
  1. LangSmithLlm Developer Tools 9.4Free plan
  2. LangChainLlm Developer Tools 9.3Free plan

Strengths and trade-offs

  • LangSmith — where it wins

    • Combines application tracing, evaluations, prompt versioning, and monitoring.
    • Tracks agent and tool calls and supports online and offline evaluations.
    • Offers cloud, hybrid, and self-hosted deployment options.

    Where it doesn't

    • Developer includes one seat and up to 5k base traces per month.
    • Developer and Plus charge pay-as-you-go after their included trace allowances.
    • Enterprise pricing is custom.

  • LangChain — where it wins

    • Pre-built agent architectures and templates support agent development.
    • Retrieval tools cover document processing, vector stores, and citations.
    • Integrations span models, tools, databases, and data sources.

    Where it doesn't

    • Deployment is self-hosted, so teams manage their own environment.
    • Support channels are limited to community and documentation.
    • Tracing, evaluation, and deployment workflows are associated with separate LangSmith.
  • LangSmith9.4/10 · Free plan

    Traces, evaluations, prompt tools, and deployment options in one LLM development platform.

    Visit LangSmithFull verdict →
  • LangChain9.3/10 · Free plan

    A self-hosted framework for agent and RAG applications, with broad integrations and retrieval tools.

    Visit LangChainFull verdict →

More comparisons

All llm developer tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update