Two tools that complement each other: PII protection meets LLM observability. Understand the difference.
View ComparisonLangfuse is an LLM observability tool (tracing, evals, prompts). PrivacyProxy is a privacy proxy (PII masking). They solve different problems and can be used together!
Yes! You can combine both tools: PrivacyProxy masks PII → LLM call → Langfuse traces the call. This gives you observability AND privacy. Langfuse also integrates directly with LiteLLM (our foundation).
Open-source LLM engineering platform. Tracing, prompt management, evaluations, cost tracking. Helps you understand what your LLM app is doing.
langfuse.comGDPR-compliant LLM proxy. Masks PII before data goes to LLM providers. Helps you comply with data protection.
privacyproxy.dev| Feature | Langfuse | PrivacyProxy |
|---|---|---|
| Category | Observability Platform | Privacy Proxy |
| Main Purpose | Debug & optimize LLM apps | Mask PII & ensure GDPR compliance |
| PII Masking | No | Automatic (420+ patterns) |
| LLM Tracing | Comprehensive (Traces, Spans, Sessions) | No |
| Prompt Management | Yes (Versioning, Playground) | No |
| Evaluations | Yes (LLM-as-Judge, Scores) | No |
| LLM Proxy | No (integrates with LiteLLM) | Yes (OpenAI-compatible) |
| Open Source | Yes (MIT License) | No (code audit available) |
| Pricing | Free tier, Pro from $59/mo | From €29/mo |
Automatically mask PII before data goes to LLM providers. Can be combined with Langfuse for full observability.
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