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Open-source LLM observability and engineering platform. Traces every LLM call, tracks costs and latency, manages prompts, runs evaluations. Debug, optimize, and improve AI products in production. Self-hosted: free. Cloud Hobby: free (50K observations/month). Core: $29/month. Pro: $199/month.
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Talk to STOAOne of the best tools for understanding what your AI application does in production. Open-source, generous free tier, framework-agnostic. If building LLM products and tracking performance and quality, Langfuse belongs on your shortlist.
