Compare Tools
Pick a category, then select 2–3 tools to compare side by side.
Category
Select 2–3 tools to compare
Langfuse
DatadogLlm Tracing
Cost Tracking
Evaluation
Prompt Management
Real Time Monitoring
Pricing
Free (self-hosted)Free cloud (50k observations)$59/mo ProCustom Enterprise
Free tier (5 hosts)$15/host/mo Infrastructure$31/host/mo APMCustom Enterprise
Open Source
Self-Hosted
SDK Languages
pythonjavascripttypescript
pythonjavascriptgojavarubycsharpphp
Frameworks
langchainllamaindexvercel-aiopenai-agents
langchainopenai-agents
Compliance
soc2gdpr
soc2hipaagdprpci-dssiso27001
Best For
Open-source LLM tracing, prompt management, and evaluation — self-hostable with broad framework support
Full-stack observability at scale — infrastructure, APM, logs, and LLM tracing in one platform
Limitations
Smaller ecosystem than Datadog; self-hosted requires Postgres + ClickHouse; evaluation features are still maturing
Expensive at scale; LLM observability is newer and less mature than dedicated tools like Langfuse; vendor lock-in on proprietary data format
Supported Not supported Unverified