Does LangChain train on your data?

Their words · Terms of Service

“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.  Customer agrees that LangChain may collect and use Operational Metadata to operate, maintain, improve, and support the LangSmith Platform, including for diagnostics, analytics, system performance, and reporting purposes.  LangChain will only disclose Operational Metadata externally if such data is (a) aggregated or anonymized with data across other customers, and (b) does not disclose the identity of Customer, Personal Data of its Users, or any Customer Confidential Information. 4.4 Feedback.  To the extent that Customer or its Users provide any recommendations, suggestions, proposals, ideas, improvements, or other feedback regarding the LangSmith Platform or Documentation (“ Feedback ”), Customer hereby grants LangChain an irrevocable, perpetual, worldwide, royalty-free license to use, incorporate, and further develop such Feedback without any restrictions or attribution, provided that Customer is not identified as the source of such Feedback. LangChain acknowledges any Feedback is provided “as is” without warranties of any kind. 4.5   Services Work Product.  Customer shall have a license right to use or access any work product or Materials delivered as part of the Services, solely for its internal business purposes and solely in connection with the LangSmith Platform regarding which the Services were commissioned. ”

Captured 2026-06-08. Open captured source →Snapshot SHA-256: 0e801934430f16ce16deae3f117978d8110b969257cf607894e37f4172fa7435