Compare Tools
Pick a category, then select 2–3 tools to compare side by side.
Category
Select 2–3 tools to compare
Datadog
LangSmithLlm Tracing
Cost Tracking
Evaluation
Prompt Management
Real Time Monitoring
Pricing
Free tier (5 hosts)$15/host/mo Infrastructure$31/host/mo APMCustom Enterprise
Free (5k traces)$39/seat/mo PlusCustom Enterprise
Open Source
Self-Hosted
SDK Languages
pythonjavascriptgojavarubycsharpphp
pythonjavascripttypescript
Frameworks
langchainopenai-agents
langchain
Compliance
soc2hipaagdprpci-dssiso27001
soc2gdpr
Best For
Full-stack observability at scale — infrastructure, APM, logs, and LLM tracing in one platform
Deep tracing and evaluation for LangChain-based agents — tightest integration with the LangChain ecosystem
Limitations
Expensive at scale; LLM observability is newer and less mature than dedicated tools like Langfuse; vendor lock-in on proprietary data format
Heavily coupled to LangChain; no self-hosted option; closed-source; less useful if you're not using LangChain
Supported Not supported Unverified