LangSmith vs Vellum
A detailed comparison to help you choose between LangSmith and Vellum.
LangSmith LLM ops and observability platform | Vellum LLM app development platform | |
|---|---|---|
| Rating | 4.4 (49 reviews) | 4.8 (237 reviews) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Teams building LLM applications wanting full observability and evaluation tooling | Product and engineering teams building LLM-powered features who need structured prompt management |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierapi access | free tierapi access |
| Visit LangSmith → | Visit Vellum → |
LangSmith
Pros
- + Full LLM observability
- + Evaluation framework
- + Trace every LLM call
Cons
- - Best with LangChain apps
- - Complex setup for standalone use
Vellum
Pros
- + Prompt version control
- + Evaluation framework
- + Workflow builder
Cons
- - Developer tool
- - Less known vs LangChain
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