Vendor and product family
LangChain
LangChain Inc., a Delaware corporation founded by Harrison Chase and Ankush Gola, publishes LangSmith Fleet and developer tools. Its company page identifies San Francisco headquarters.
1 source-reviewed catalog entry. Reviews check official published information and do not establish hands-on testing.
Company websiteWhat this vendor offers
Choose an app for a task you want to do now. Models and developer platforms usually need a separate app, integration or technical setup.
Apps and products
Open these products to work on a task.
App or product
LangSmith Fleet
Build and share agents with connected tools, memory and approval steps through a hosted workspace.
Official source reviewed 2026-10-20
Hosted LangSmith account; formerly LangSmith Agent Builder. Developer plan is $0 with one seat and 7 monthly Fleet usage units per organization, then pauses at the allowance. Plus is $39/seat/month with 37 units per organization and paid overage. Fleet model costs are included; tracing usage and third-party tools can add charges. Self-hosting requires sales contact.
Choose by what you want to do
One company may offer several products with different access, setup and costs. Its underlying model name does not tell you which product you need.