Seeing what your LLM app actually did.
LangSmith traces every call in an LLM application — prompts\, responses\, latency\, cost — and provides evaluation tooling so you can measure whether a change made things better.
Without this you are guessing\, which is why it became close to standard for teams running LLM apps in production. It works with or without LangChain. Pricing is per seat plus usage beyond included traces\, which can surprise you at volume.
Quick Information
Platform
Web
Pricing
Free + Paid (from $39/seat/mo)
API
Available
Category
Coding & Development
Pros and Cons
Pros
- Full tracing of LLM applications
- Evaluation tooling to measure changes
- Free Developer tier
- Works without LangChain
- Deployment options on Plus
Cons
- Per-seat plus usage pricing
- Trace costs surprise you at volume
- Short retention on base traces
- Learning curve for evaluation design