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2 / 4 Tools
| Attribute | LangSmith by LangChain Inc. | Langfuse by Langfuse, Inc. |
|---|---|---|
| Category | Developer Tools | Developer Tools Subcategory: LLM Observability & Evaluation |
| Rating & Reviews | ★New / 5.0 0 verified reviews Weighted score: 0.00 | ★New / 5.0 0 verified reviews Weighted score: 0.00 |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier Developer tier free (5,000 traces/mo); Plus at $39/seat/month; Enterprise custom pricing. | 0 Cloud Free tier includes 50,000 observations per month. Pro tier starts at $59/month. Core platform is open source under MIT with self-hosting free of software licensing fees. |
| Platforms | WebAPI | CloudSelf-Hosted DockerKubernetesPython SDKNode.js SDK |
| AI Capabilities | Execution Trace VisualizationAutomated Evaluation BenchmarksLatency & Token Cost MonitoringPrompt Version Control Playground | LLM tracingPrompt managementModel evaluationCost & latency monitoringDataset curation |
| Overview | Debug, monitor, evaluate, and trace every step of your LLM applications from prototype to production. | Open-source LLM engineering platform for application tracing, evaluations, prompt management, and latency metrics. |
| Tags | observabilitydebugginglangchainevals | observabilityllm-opsprompt-managementopen-sourceevaluations |
