Vendor record · langchain.com
What LangChain promises about your data.
Where LangChain publishes its promises, how long it gives you when it adds a sub-processor, and what has changed.
- Where it publishes
LangChain lists its sub-processors at trust.langchain.com/subprocessors. We last read it on October 15, 2026.
- What has changed
We've recorded no change to its sub-processor list or data processing agreement between August 31, 2026 and September 15, 2026. Subscribers hear about a change the morning we read it; the public record shows it 30 days later.
- Its window
When it adds a sub-processor, its clause at langchain.com/dpa (read September 30, 2026) gives you 7 days to object.
- Window
- 7
- Sub-processors
- 11
- Pages
- 5
- Copies
- 15
days to object when it adds a sub-processor
sub-processors named
pages we watch
dated copies of all its pages, since August 31, 2026
LangChain DPA
LangChain's data processing agreement gives 7 days to object to a new sub-processor. Here is the clause, from our September 30, 2026 copy:
7
days to object
“Customer may only object to the addition of a Subprocessor within seven days of LangChain’s update based on reasonable grounds relating to a Subprocessor’s ability to protect Personal Data in accordance with Data Protection Law by providing written notice detailing the grounds of such objection.”
Found automatically and not yet checked by a person. The quote is exact, and the link goes to the source. Nothing here says whether the term is good or bad, only that LangChain published it.
langchain.com/dpa · read 2026-09-30 · fingerprint 482be1890193fd5d…
How it says it sends notice
“Provided that Customer subscribes to updates using the mechanism provided at the Subprocessor List website (as specified in Annex III), LangChain will inform Customer of any addition or replacement of Subprocessors at least seven days prior to such new Subprocessor(s) Processing Personal Data, thereby giving Customer the opportunity to object to such change.”
langchain.com/dpa · read 2026-09-30
What it says if you do not object
“If Customer does not timely object to a new Subprocessor, the Subprocessor is deemed accepted.”
langchain.com/dpa · read 2026-09-30
Notice windows across every vendor we watch · Silence as consent
LangChain sub-processors
LangChain publishes a sub-processor list at trust.langchain.com/subprocessors; we last read it on October 15, 2026. It names 11 entries. The entries, as the list prints them: Amazon Web Services; Anthropic; Baseten; Clickhouse; Fireworks AI; Google Cloud Platform; OpenAI; Parallel Web Systems; Pylon; Stripe; Supabase. The same list is in the full table below. The public record holds no change to the list read before September 15, 2026. A change we read after September 15, 2026 is published 30 days after we read it.
11 named · full table
Every public change we have recorded · Where vendors publish their lists
How long LangChain keeps your data
We hold no statement about data retention from LangChain's watched pages. The pages we watch: data processing agreement langchain.com/dpa; pricing page langchain.com/pricing; privacy policy langchain.com/privacy-policy; sub-processor list trust.langchain.com/subprocessors; terms of service langchain.com/terms-of-service. On training with customer data, LangChain's privacy policy (langchain.com/privacy-policy, in the copy read September 11, 2026) says: “You may opt out of our marketing communications as described in the “Opt out of marketing communications” section below. For research and development. We may use your personal information for research and development purposes, including to analyze and improve our Services and our business.”
Training on customer data
“LangChain agrees that it will not use Customer Data to train on, develop, or otherwise improve its products, including any large language models. 4.3 Operational Metadata.”
langchain.com/terms-of-service · read 2026-09-11
Training on customer data
“"Personal Data" means Customer Data relating to an identified or identifiable natural person. “Self-Hosted Deployment” means a version of the LangSmith Platform licensed for installation and operation within the Customer Infrastructure. “Services” means professional consulting services purchased by Customer in the applicable Order Form and relating to training and assistance with Lang…”
langchain.com/terms-of-service · read 2026-09-11
Retention windows vendors publish · What vendors say about training
What the pages say
Read automatically from the pages below and shown as printed. A missing row is a gap in our reading, not proof it isn’t there.
Sub-processors named · 11 · 4 name an AI provider we list
Amazon Web Services
AWS is LangChain's Cloud hosting provider and provides LLM inference for AI-powered features for applicable features and plans.
USA
AnthropicAI · Anthropic
Provides LLM inference for AI-powered features
USA
BasetenAI · Baseten
Provides LLM inference for AI-powered features
USA
Clickhouse
Production database
USA or Netherlands
Fireworks AIAI · Fireworks AI
Provides LLM inference for AI-powered features
USA
Google Cloud Platform
GCP is LangChain's Cloud hosting provider and provides LLM inference for AI-powered features for applicable features and plans.
USA or Netherlands
OpenAIAI · OpenAI
Provides LLM inference for AI-powered features
USA
Parallel Web Systems
Provides web search for AI-powered features
USA
Pylon
To provide customer support ticketing and communication services
USA
Stripe
To provide payment processing services for self-serve customers
USA
Supabase
Authentication and backend services for LangSmith
US or Germany
The pages' own stamps: Last updated 2024-04-28 · Last updated 2026-06-02
The pages we watch
Every page we read, so you can check it. Each is re-read on a schedule, and we keep a dated copy when it changes.
What this page doesn’t tell you
No score.
Nothing here rates LangChain. A short notice window is a contract term, not a criticism.
Public pages only.
Private notices and negotiated terms are invisible to us. Your agreement may say something different.
Wrong? Tell us.
Corrections are free, always. We reply within 2–3 business days.
How we read a page · The change log
Work at LangChain? With an email at langchain.com you can claim this record, suggest pages we should watch, and take a free copy of it. Claiming changes nothing we publish.
Is LangChain in your product? Hear the morning we read a change.
You get the lines that moved, in LangChain’s own words, and the date any window closes. No card. Nothing to cancel.