Langfuse vs LangSmith

Detailed regulatory comparison mapping timeline compliance, pricing model, technical capabilities, and data residency.

Feature / Parameter	Langfuse	LangSmith
HQ & Data Sovereignty	Berlin, Germany EU-Native	San Francisco, USA US-Hosted
Target Role	PROVIDER DEPLOYER	PROVIDER
Pricing Tier	$0 / $59/mo (Freemium)	$39/seat/mo (Freemium)
Active 2026 Focus	Article 50 Execution Trace Logging Token Cost & Prompt Auditing	LLM Dataset Quality Evals Output Regression Testing
Prepare 2027/2028 (High-Risk)	Article 12 Mandatory Post-Market Audit Trails	Article 12 Execution Traces for Agent Chains
Model Evals & Red-Teaming	✅ Supported	✅ Supported
Annex IV Technical Documentation	✅ Supported	❌ Not Available
ISO 42001 Control Mapping	❌ Not Available	❌ Not Available
Verified Audit Source	Inspect Evidence (2026-08-15) ↗	Inspect Evidence (2026-08-13) ↗

Run our interactive 3-step Assessment Engine to match your specific model tier, budget, and EU compliance deadline.