LangChain
by LangChain
At a glance
Open-source framework for building LLM applications and agents, with LangSmith and LangGraph for observability and orchestration.
framework open-source agents llm-apps
- Licence
- MIT
- Category
- Agents & Automation
- Business model
- Open (open weights/source)
- Availability
- Global
- Launched
- 2022-10
Overview
LangChain is a widely used open-source framework for building applications and agents with large language models, available in Python and JavaScript. The company also offers LangSmith for observability and evaluation and LangGraph for stateful agent orchestration. The framework is free; LangSmith has paid tiers.
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Key features
- LangChain, LangGraph, and deepagents open-source frameworks
- LangSmith platform for evaluation, observability, and deployment
- Sandboxes and governance for agent-generated code and sensitive actions
- SaaS, BYOC, and self-hosted deployment options
Use cases
- Building RAG pipelines and chatbots
- Orchestrating multi-step agents
- Debugging and evaluating LLM applications
Pricing
The framework is free and open source; LangSmith offers a free tier plus paid plans for teams.
Record details
Provenance, dates and links are kept here so the main sections stay about the product itself.
Links, dates and provenance
- Record updated
- 2026-09-10
- Pricing
- www.langchain.com ↗
- Founded
- 2022
- Headquarters
- US
- Canonical URL
- https://globalaiproductindex.com/products/langchain/
Selection profile
Every field says where its value comes from. "Unknown" means we have not confirmed it — it does not mean the product lacks the feature.
Selection profile11 fields5 unknown
- Tasks it fits
- Automation agents
Derived from the record: category "agents".
Suggest a correction - How you use it
- Self-run service
Open-source project without a tag describing its delivery form; run it yourself.
Suggest a correction - Runs on
- Not recorded
No platform support is stated in the record.
Suggest a correction - Where it runs
- Not recorded
Open-source record without a hosting signal; deployment target not recorded.
Suggest a correction - Works offline
- Not recorded
The record contains no offline-operation claim.
Suggest a correction - Official service region
- Global
Mirrors the availability field already on the record ("global").
Suggest a correction - Public API
- Not recorded
The record does not state whether a public API exists.
Suggest a correction - Licence
- MIT
Mirrors the licence already recorded on the product record; not re-verified against the licence text by this migration.
Suggest a correction - Commercial use
- Permitted
Recorded licence allows commercial use (copyleft obligations may still apply).
Suggest a correction - Interface languages
- Not recorded
No vendor page read in this pass states the product's own interface languages; the key exists so the field can be answered later rather than left absent.
Suggest a correction - Billing
- Open source Free Free allowance: Yes Subscription required: No
Prices are the vendor’s advertised entry price and exclude taxes; always confirm on the vendor’s own page.
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Where each value comes from
- Tasks it fits
- Our inference
- How you use it
- Our inference
- Runs on
- Our inference
- Where it runs
- Our inference
- Works offline
- Our inference
- Official service region
- Our inference
- Public API
- Our inference
- Licence
- Our inference
- Commercial use
- Our inference
- Interface languages
- Unknown
Frequently asked questions
Is LangChain free?
Yes. The LangChain framework is open source and free; LangSmith has a free tier and paid plans.
What are LangGraph and LangSmith?
LangGraph orchestrates stateful agents, while LangSmith provides tracing, evaluation, and monitoring.
Which languages does LangChain support?
LangChain is available in Python and JavaScript/TypeScript.
What does LangChain not record?
No public documentation page is recorded for LangChain because no same-site page could be confirmed as its docs, and self-hosted or offline deployment is not established.
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Related guides
Sources
This record was last reviewed on 2026-09-10.
Machine-readable record: /api/products/langchain.json · Spot an error? Suggest a correction