Helicone is the open-source LLM observability platform for developers to monitor, debug, and improve production-ready applications.


Ambertrace is described as 'LLM observability platform with an open source SDK that traces every AI agent call across OpenAI, Anthropic, and Google with zero code changes' and is an app. There are six alternatives to Ambertrace for Web-based, SaaS, Docker and Self-Hosted. The best Ambertrace alternative is Helicone. It's not free, so if you're looking for a free alternative, you could try Helicone or LLMCap. Other great apps like Ambertrace are Respan AI, PerUnit and PromptSpend.
Helicone is the open-source LLM observability platform for developers to monitor, debug, and improve production-ready applications.


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.



Corrath is an AI security gateway built for developers and organizations building with Large Language Models.

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.




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.


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— from a pricing catalog that re-checks itself every morning against vendor sources, so the numbers are never a year out of date.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.
