Langfuse vs Medusa

Langfuse

Medusa

Langfuse · 16 features

• Annotation Queues — Human reviewers rate traces. Unlimited on Pro+.
• Dashboards — Aggregate metrics, cost, quality across projects.
• Datasets — Curate test sets from production traces. Run experiments.
• EU Cloud Region — GDPR-compliant hosting in EU.
• Evaluations — LLM-as-judge, manual scores, custom model-graded evaluators.
• LLM Cost Tracking — Automatic cost calculation per provider/model.
• OpenTelemetry Native — OTel SDK → Langfuse endpoint works out of box.
• Playground — Test prompts + models + variables live.
• Prompt Management — Version, tag, label prompts. Reference from code by label.
• Public API — Full REST API for ingest, query, prompt management.
• Python @observe decorator — One-line decorator to trace any function.
• Self-Hosting — Docker Compose + k8s Helm chart.
• Sessions — Group related traces (conversations, agent runs).
• Tracing — Capture every LLM call, tool call, nested span with inputs/outputs/cost.
• Users Tracking — Segment traces by user ID, track per-user cost.
• Webhooks — Subscribe to trace completion events.

Medusa · 16 features

• Admin Dashboard — React-based admin UI.
• Auth — Customer + admin auth with JWT.
• Cart — Multi-region carts with tax/pricing logic.
• Checkout — Multi-step checkout flow.
• Customers + Groups — Customer records + B2B groups.
• Dynamic Pricing — Price lists, rules, customer-specific.
• Event Bus — Async events via Redis / RabbitMQ.
• File Service — Pluggable storage (S3, local).
• Gift Cards — Native gift-card support.
• Inventory + Multi-warehouse — Stock tracking across locations.
• Next.js Starter — Production-ready Next.js storefront.
• Orders + Fulfillment — Full order lifecycle (edits, returns, exchanges).
• Products + Variants — Products with options, variants, images.
• Promotions + Discounts — Rule-based promos, campaigns.
• Tax Providers — Pluggable tax calculation.
• Workflows Engine — Durable saga-style business logic.