LLM API gateway with per-user cost accounting, hard budget limits, and model routing that lets any developer ship a multi-tenant AI product without building spend-control infrastructure themselves
Every developer shipping an AI feature to end users is silently bleeding margin on a small number of power users with no lever to stop it until costs explode
Built for Organizations and LLM app developers managing multiple users accessing OpenAI/Claude APIs who need cost control and per-user usage monitoring..
Embed directly into the developer workflow as a drop-in proxy so integration is a one-line SDK change rather than an infrastructure project
“Hi all! I have noticed that several organisations and LLM-app developers find it difficult and time-consuming to create gateways to monitor and control user usa…”
The receipts — real demand
“Hi all! I have noticed that several organisations and LLM-app developers find it difficult and time-consuming to create gateways to monitor and control user usage. To solve this, I am helping develop a (hosted) LLM-specific API gateway (https://llmetrics.app) with an admin dashboard where you are able to track user-level costs accurately and robustly set cost limits and access rules.”
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demand score 7.0 — the receipts are below
Why this is a gap
Surfaced from a high-intensity complaint with clear willingness to pay and a specific, reachable audience.
The market
LLM app developers and organizations using multiple OpenAI or Claude users need per-user cost tracking and spend control. ~40 monthly searches indicates steady, focused demand from a technical audience.
Competition & the opening
Berri, Helicone, and LangSmith offer LLM monitoring; major cloud providers (AWS, GCP) have billing dashboards. The gap is a purpose-built API gateway that abstracts multi-LLM routing, cost attribution, and usage limits without forcing users into a single provider lock-in.
real pricing LiteLLM (open-source, MIT license, hard budget caps + per-user cost tracking across 100+ providers) Enterprise Basic from $250/month; Enterprise Premium roughly $30,000/year; free tier available · Portkey from $499/month; free tier available
What's hard to build
Building a reliable API gateway requires handling high-throughput requests, caching, and real-time cost attribution across OpenAI, Anthropic, and other APIs—each with different pricing models and latency profiles. Feasibility is marked 8/10 hard; infrastructure costs and competitive pressure from well-funded incumbents is high.
Why now
LLM costs are unpredictable and multi-provider strategies are now standard, creating urgent need for unified cost visibility.
How you'd monetize
$99-499/mo SaaS based on API volume