Compare Tools
Pick a category, then select 2–3 tools to compare side by side.
Category
Select 2–3 tools to compare
Langfuse
LangSmithLlm Tracing
Cost Tracking
Evaluation
Prompt Management
Real Time Monitoring
Pricing
Free (self-hosted)Free cloud (50k observations)$59/mo ProCustom Enterprise
Free (5k traces)$39/seat/mo PlusCustom Enterprise
Open Source
Self-Hosted
SDK Languages
pythonjavascripttypescript
pythonjavascripttypescript
Frameworks
langchainllamaindexvercel-aiopenai-agents
langchain
Compliance
soc2gdpr
soc2gdpr
Best For
Open-source LLM tracing, prompt management, and evaluation — self-hostable with broad framework support
Deep tracing and evaluation for LangChain-based agents — tightest integration with the LangChain ecosystem
Limitations
Smaller ecosystem than Datadog; self-hosted requires Postgres + ClickHouse; evaluation features are still maturing
Heavily coupled to LangChain; no self-hosted option; closed-source; less useful if you're not using LangChain
Supported Not supported Unverified