Compare DevTools
Promptfoo vs LangSmith
Promptfoo vs LangSmith: compare pricing, use cases, AI models, integrations, privacy, governance and best fit by context.
Promptfoo vs LangSmith : buying comparison
This comparison helps choose between Promptfoo and LangSmith by pricing, use case, models, integration, privacy and governance.
Budget: Promptfoo · Open source / enterprise. Rating: LangSmith · 4.5/5.
| Criteria | Promptfoo | LangSmith |
|---|---|---|
| Price | Open source / enterprise | $0+ usage |
| Best for | Automated LLM evals, red teaming, security testing and CI/CD checks | Tracing, debugging, evaluating and monitoring LangChain and agent applications |
| Models | Prompt evals, model comparison, RAG tests, jailbreak checks, red teaming, benchmarks and reports | Traces, datasets, experiments, evaluators, prompt iteration, cost tracking and production monitoring |
| Privacy | Open-source local evals and on-prem enterprise deployment for controlled infrastructure | Hosted platform with enterprise and self-host/hybrid options for larger organizations |
| Rating | 4.4/5 | 4.5/5 |
Frequently asked questions
Promptfoo or LangSmith: which one should you choose?
Choose Promptfoo 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 Promptfoo and LangSmith 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.