Apps similar to PerUnit include Langfuse, which has a free version. Other options are Helicone, Orbit AI, MarginDash and Ambertrace. In total there are seven Large Language Model (LLM) Tools like PerUnit for the web and self-hosting.
Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more.
Germany
EU
Helicone is the open-source LLM observability platform for developers to monitor, debug, and improve production-ready applications.
United States
Orbit is a developer tool for monitoring AI API usage in production applications. It provides real-time visibility into token consumption, costs, latency, and errors across multiple LLM providers.
India
AI cost tracking per customer. Shows which customers are profitable after API costs, with Stripe revenue sync, cost simulator, and budget alerts.
United States
Ambertrace is an LLM observability platform with an open source SDK that traces every AI agent call across OpenAI, Anthropic, and Google with zero code changes.
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.
Canada
Corrath is an AI security gateway built for developers and organizations building with Large Language Models.
India
