Agent harnesses
LangSmith
Agent harnesses
Commercial
What it is
Our note
Managed tracing/eval/deployment companion for LangChain/LangGraph
At a glance
- Vendor
- LangChain
- Business model
- Commercial
Links and sources
- Official sitesmith.langchain.com
Facts verified nov 10, 2026; added nov 8, 2026. Vendor facts come from the vendor’s own pages; benchmark claims are self-reported unless we say otherwise.