Know your AI costs
per customer
The Problem
You only see the total AI invoice
Most teams see a single OpenAI or Anthropic bill each month. They know they're spending real money on AI, but not which customers, features, or pricing tiers are driving that cost.
You're spending $12,000/month on OpenAI but have no idea:
Which specific customers are the most expensive to serve.
Whether free-tier users are burning more credits than paid users.
Which AI features (chatbot, email writer, analytics, etc.) are driving 80% of your cost.
How AI costs compare to the revenue you collect from each account.
What PerUnit shows you
Turn AI invoices into unit economics
PerUnit gives you a real-time view of AI spend per customer, per feature, and per pricing tier so you can make clear, defensible product and pricing decisions.
Cost per customer
See exactly how much each account costs you in AI usage, broken down by workspace or tenant.
Cost by pricing tier
Understand if free, Pro, or Enterprise plans are actually profitable once AI costs are included.
Cost by feature
Attribute spend to each AI feature so you know what to gate, bundle, or deprecate.
Revenue vs. AI cost
Connect Stripe revenue to AI spend so you can see margins by customer, tier, and feature.
A global view of
your AI economics
Cost by region
See how AI spend is distributed across regions, tenants, or workspaces at a glance.
High-value accounts
Quickly surface customers with healthy margins and those that quietly burn through credits.
Usage patterns
Spot spikes, heavy features, and emerging usage so you can adjust pricing before costs explode.
Instrument AI usage in minutes
Send AI usage and cost events to PerUnit from your app or data warehouse using simple, strongly-typed SDKs—no custom metering platform required.
import { perunit } from "@perunit/sdk";
// Called whenever an AI request is made
await perunit.trackUsage({
customerId: "acct_123",
feature: "chat-assistant",
tier: "pro",
provider: "openai",
model: "gpt-4.1",
tokensInput: 824,
tokensOutput: 1932,
metadata: {
workspaceId: "workspace_45",
messageId: "msg_987",
},
});- Drop-in SDKs
- Client and server SDKs designed for modern B2B SaaS stacks, from Next.js to background workers.
- Plug into billing
- Connect Stripe and your data warehouse to tie AI spend directly to revenue and accounts.
- Pre-built integrations
- Bring in usage from OpenAI, Anthropic, and more without managing brittle custom scripts.
- Security & privacy
- Built with B2B security in mind—PII aware data models and clear data ownership boundaries.
Numbers your finance team can trust
PerUnit connects your AI providers and billing data to give you an always-on view of AI economics—so product, finance, and leadership are finally looking at the same numbers.
- 95%
- Spend attributed
- < 1 week
- Time to clarity
- Up to 40%
- Cost savings unlocked
Join the PerUnit waitlist
We're onboarding a small group of B2B SaaS teams spending $5k–50k/month on AI who need clarity on their unit economics.
We'll follow up with a short onboarding call to map your OpenAI/Anthropic and Stripe data.