Langfuse is described as 'Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more' and is a large language model (llm) tool in the ai tools & services category. There are more than 10 alternatives to Langfuse for a variety of platforms, including Web-based, SaaS, Docker, Self-Hosted and Python apps. The best Langfuse alternative is AcruxCore, which is both free and Open Source. Other great apps like Langfuse are Zespan, RapidClaw, AgentInspect and Opik.
Your AI bill is growing — but which customers, features, and pricing tiers are driving it? Most dashboards show totals. Totals don't help you decide who to charge more, what to gate, or where to cut.
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Spendline is the AI spend control layer: per-customer LLM cost attribution, budget enforcement, and a finance-grade month close.
United States
LLMCap is a reverse proxy that enforces real-time, dollar-based spending caps on LLM API calls. When you hit your cap, the next request returns 429 — the token is never consumed and money is never spent.
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The agentic analyst for your agents. Your observability tool only tells you what happened. TwoTail figures out why, and what you should change.
DenmarkEU
Know the tab before you build. PromptSpend estimates, compares, and explains what an AI feature will cost — from a pricing catalog that re-checks itself every morning against vendor sources, so the numbers are never a year out of date. Free, open source, no accounts, no tracking.
United States
Unified gateway centralizing LLM traffic routing, observability, centralized evaluations, prompt versioning, synchronized tracing, and spend controls. Streamlines diagnosis, debugging, and iteration for AI agents across dashboards, fitting solo builders and large teams handling complex workflows.
United States
Corrath is an AI security gateway built for developers and organizations building with Large Language Models.
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