A agentindex
Comparison

Helicone vs Langfuse

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Helicone

Proxy-based LLM observability with instant cost tracking.

  • + Fastest setup via a drop-in proxy
  • + Automatic cost and rate-limit tracking
  • − Eval features lighter than competitors
  • − Proxy model adds a hop

Langfuse

The most-used open-source LLM observability tool.

  • + Open source and self-hostable
  • + Framework-agnostic via OpenTelemetry
  • − Self-hosting ClickHouse is operational work
  • − Eval features trail dedicated eval tools
Spec Helicone Langfuse
Role Observability Observability
Tags observability, llm-gateway, persona-platform-engineer observability, evaluation, prompt-management, persona-data-scientist, persona-platform-engineer
License Apache-2.0 MIT
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing freemium freemium
Price Free tier Free tier
Usage cost No model cost No model cost
Models multi multi
Languages typescript python, typescript
GitHub stars 5.9k 30.4k
Last activity 2026-06-11 2026-07-03