Unexpected AI bills — real-time token usage monitoring, budgeting & optimization

Many engineering leaders, ML platform teams, SREs and FinOps orgs at mid-to-large tech companies are getting hit with unpredictable, token-metered LLM bills—single queries, model changes or runaway loops can generate 10x cost spikes overnight—yet there are no standardized tools to attribute, budget and enforce token usage across multiple vendors. The opportunity touches roughly 150,000 mid+ enterprises, implying a $15.0B addressable market if organizations spend an average of $100K/year on AI ops, monitoring and FinOps services. You could build a developer-first platform that performs real-time token-level instrumentation, per-request attribution across multi-vendor stacks, budget controls and prescriptive optimization recommendations (model selection, temperature/rate limits, batching) with SDKs and billing integrations for immediate chargeback. This market is unusually attractive now because metered API pricing and rapid enterprise AI adoption mean spend is both growing and volatile, multi-vendor deployments are common, and analysts score the space highly (market score 95/100, revenue potential 90/100). To stand out, focus on low-latency token streaming instrumentation, deterministic cross-provider normalization, tight developer ergonomics and automated policy enforcement so teams get immediate ROI from reduced overruns and clearer chargeback. Be honest about challenges: integrating accurate token counts across proprietary SDKs, meeting privacy/compliance constraints, and competing with established observability players mean longer sales cycles, but the high ARPC and demonstrable cost savings can justify the upfront GTM and engineering effort.