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Free-Limited
Tool Comparison
LangSmith
Debug, test, and monitor your LLM apps — full trace visibility for every run.
VS
At a Glance
| Attribute | LangSmith | Evidently AI |
|---|---|---|
| License / Pricing | Free-Limited | Open Source |
| Type | ai | ai |
| GitHub Stars | — | — |
| Rating | 4.5/5 | 4.3/5 |
| Key Features | 6 listed | 6 listed |
| Integrations | 5 listed | 5 listed |
| Categories | AI Observability | AI Observability |
Key Features
LangSmith
- Full trace visualization for every LLM call and chain step
- Dataset management for evaluation benchmarks
- Automated evaluators with LLM-as-judge
- Prompt versioning and A/B testing
- Production monitoring with latency and error tracking
- Human annotation workflows for labeling
Evidently AI
- Data drift detection across tabular, text, and embeddings
- LLM evaluation metrics: faithfulness, relevance, toxicity
- Interactive HTML reports for sharing with stakeholders
- Test suites for automated data quality CI checks
- Evidently Cloud for production monitoring dashboards
- Supports sklearn, pandas, and any ML framework
Real-World Use Cases
LangSmith
Debug a hallucinating RAG pipeline
Add LANGSMITH_API_KEY to your environment
Evidently AI
Add ML model monitoring to CI/CD
Load reference (training) and current (production) data
Integrations
LangSmith
langchainllamaindexopenaianthropicpinecone
Evidently AI
mlflowwandbairflowkubeflowlangchain
🏆 Which should you choose?
Choose LangSmith if…
- → you want a managed or commercial offering with enterprise support and SLAs
Choose Evidently AI if…
- → you need a fully open-source, self-hosted solution with no vendor lock-in