Build it yourself, or ship it this week
An honest look at what MetricAI replaces, what it complements, and what it deliberately leaves to the tools you already run.
MetricAI vs building it in-house
Metering is easy to prototype and hard to get correct. The difficulty is not the first counter - it is streaming edge cases, retries, provider price changes, and a ledger that still balances a year later.
| Capability | In-house build | MetricAI |
|---|---|---|
| Time to first metered call | Weeks | Minutes |
| Streaming-safe token capture | Build it | |
| Append-only, double-entry ledger | Build it | |
| Idempotent billing writes | Build it | |
| Provider price-book maintenance | Ongoing, manual | Maintained |
| Per-tenant / per-agent attribution | Build it | |
| Budget enforcement at call time | Build it | |
| Reconciliation against provider invoices | Spreadsheets | |
| Ongoing maintenance owner | Your team | Us |
Where we sit next to adjacent categories
Gateways route, observability explains, billing platforms collect. MetricAI is the financial record between them - and it is common to run it alongside all three.
| Capability | MetricAI | LLM gateway | LLM observability | Billing platform |
|---|---|---|---|---|
| Usage metering per call | Partial | |||
| Financial-grade ledger | Partial | |||
| Customer-level attribution | Partial | |||
| Budget enforcement | Partial | |||
| Provider routing | ||||
| Prompt / trace debugging | Partial | |||
| Invoicing & tax documents | Partial | |||
| Payment collection |
Category columns describe the typical scope of each tool class, not any specific vendor. Individual products vary - check the one you are evaluating.
What MetricAI does not replace
We produce the usage and invoice data. Charging the card is still Stripe, Razorpay, or whoever you already use.
We keep request-level logs, traces, and latency for billing and cost debugging. We are not a replacement for your APM, error tracker, or eval platform.
MetricAI sits in front of providers, it does not host models. You keep your own accounts, keys, and rate limits.
We export reconcilable usage and invoice records. Your books stay in your ERP or accounting tool.