Compare DevTools
LangSmith vs Promptfoo
LangSmith vs Promptfoo: compare pricing, use cases, AI models, integrations, privacy, governance and best fit by context.
LangSmith vs Promptfoo : buying comparison
This comparison helps choose between LangSmith and Promptfoo by pricing, use case, models, integration, privacy and governance.
Budget: LangSmith · $0+ usage. Rating: LangSmith · 4.5/5.
| Criteria | LangSmith | Promptfoo |
|---|---|---|
| Price | $0+ usage | Open source / enterprise |
| Best for | Tracing, debugging, evaluating and monitoring LangChain and agent applications | Automated LLM evals, red teaming, security testing and CI/CD checks |
| Models | Traces, datasets, experiments, evaluators, prompt iteration, cost tracking and production monitoring | Prompt evals, model comparison, RAG tests, jailbreak checks, red teaming, benchmarks and reports |
| Privacy | Hosted platform with enterprise and self-host/hybrid options for larger organizations | Open-source local evals and on-prem enterprise deployment for controlled infrastructure |
| Rating | 4.5/5 | 4.4/5 |
Frequently asked questions
LangSmith or Promptfoo: which one should you choose?
Choose LangSmith if entry budget is the priority. Choose LangSmith if perceived maturity and overall rating matter more. The final test should still be based on your repository.
Do LangSmith and Promptfoo cover the same need?
Not exactly. Compare the real workflow: IDE, terminal, governance, code review or app generation.
How can teams run a fair test?
Use the same ticket, same repository and same data constraints, then measure saved time, errors, diff quality and monthly cost.