2 Langfuse Alternatives, Compared
An open-source LLM engineering platform for tracing, evaluation, prompt management, and metrics. [#opensource](https://github.com/langfuse/langfuse) sits in Agent Tracing. Below is every comparable tool we hold data on — 2 of them have a free tier.
Still want the original? Read our Langfuse write-up.
| Tool | What it does | Pricing | Free tier |
|---|---|---|---|
| Open-source observability for your LLM application, based on OpenTelemetry  | Free tier | ||
| Open-source AI observability for LLM apps | Free tier |
Openllmetry — Open-source observability for your LLM application, based on OpenTelemetry 
Open-source observability for your LLM application, based on OpenTelemetry  Found in: kyrolabs/awesome-langchain
Arize Phoenix — Open-source AI observability for LLM apps
Found in: Yigtwxx/Awesome-RAG-Production
Common questions
What is the best Langfuse alternative?
Openllmetry is the closest alternative to Langfuse in the Agent Tracing category. Open-source observability for your LLM application, based on OpenTelemetry  Which one fits depends on whether you need a free tier — 2 of these 2 options have one.
Is there a free alternative to Langfuse?
Yes — Openllmetry, Arize Phoenix all offer a free tier.
How were these Langfuse alternatives chosen?
They are tools listed in the same category as Langfuse on Neura Market, ranked by how closely they match on capability. We list every option we hold data for rather than a paid-placement shortlist.