LangChain announced general availability of LangSmith Bring Your Own Cloud (BYOC) on Amazon Web Services (AWS) on August 12, 2026. BYOC is a managed LangSmith deployment running in customer AWS accounts and VPCs, with sensitive data—traces, datasets, experiments, prompts, agent deployments, sandbox data—staying in the customer's own cloud environment. LangChain provisions and operates the platform, handling monitoring, upgrades, scaling, and cluster lifecycle management.
The deployment uses a split-plane architecture: the control plane in LangChain's cloud handles authentication and user management while the data plane runs in the customer's VPC with EKS, RDS, S3, and other AWS services. Communication uses AWS PrivateLink and doesn't traverse the public internet. Customers can apply a Terraform module to set up the IAM role and create a data plane; LangChain then provisions the VPC, EKS cluster, databases, and ingress. BYOC is available across 15 AWS regions in the US, EU, and APAC.
For agent teams shipping to production, this removes a key blocker: observability and deployment infrastructure that keeps sensitive traces (PII, customer records, internal API responses) inside the customer's network boundary. Enterprise teams in regulated industries (financial services, healthcare, cybersecurity) need both the visibility of managed LangSmith and the data residency guarantees of self-hosted deployments. BYOC splits the difference—managed operations without data leaving the customer's AWS account.