Know which customers are actually profitable.

Connect Stripe + your LLM provider. See AI gross margin per customer in 5 minutes.

Your LLM bill is one number. Your customers are many.

13×

growth in AI API spend across SaaS in 2025 — Ramp

49%

of organizations cannot calculate AI ROI — CloudZero

50–60%

AI SaaS gross margin — vs 80–90% traditional SaaS — Bessemer 2026

OpenAI shows total spend. Stripe shows revenue. Nothing connects them. You're flying blind.

What you'll actually see.

Real per-customer profitability · AI cost included

AI Cost / MRR — last 30 days

11.2% +1.8% vs last month

Revenue

$24,140

AI cost

$2,704

Customer

AI cost

MRR

Margin

Acme Corp

cust_acme · Pro plan

$487

$99

−$388

Beta Inc

cust_beta · Pro plan

$156

$99

−$57

Gamma Co

cust_gamma · Scale plan

$134

$499

+$365

Delta LLC

cust_delta · Pro plan

$89

$199

+$110

Epsilon Ltd

cust_epsilon · Starter

$43

$49

+$6

2 customers losing money this month — $445 lost margin

Three steps. Five minutes.

Step 01 ~ 30 sec

Restricted key · Read-only

customers · subscriptions · charges

Connect Stripe

Paste a read-only restricted key. We see customers and revenue. Never card data.

Step 02 ~ 1 min

API key · Encrypted

openai sk-•••••2k4f

anthropic sk-ant-••••••a9

google + add

aes-256 at rest

Connect your LLM provider

OpenAI, Anthropic, Google. Add API key. Encrypted at rest.

Step 03 ~ 3 min

SDK · 1 line

const r = await openai.chat.completions.create({...})
await margine.trackResponse(r, { customerId: "cust_acme" })

r = openai.chat.completions.create(...)
margine.track_response(r, customer_id="cust_acme")

$r = OpenAI::chat()->create([...]);
\Margine\Sdk::trackResponse($r, ['customerId' => 'cust_acme']);

Tag customer_id in your calls

One line around your existing OpenAI, Anthropic, or Google call. PHP, Python, and JavaScript SDKs — single-file, zero dependencies.

Questions you can finally answer.

Which of my customers are losing me money?
What's my AI gross margin per customer cohort?
Which customer should I move to a higher tier?
What's my AI cost as % of MRR this month?
Did this customer just trigger a runaway agent?
Can I afford to keep the GPT-5 feature?

Made for founders. Not enterprise FinOps.

Why Margine and not the others

Tool

Revenue link

Margine

Native Stripe sync · Per-customer margin

Helicone, Langfuse

Cost only · No revenue context

CloudZero, Amberflo

Enterprise · $2,500+/mo · Sales-led

OpenAI Dashboard

Aggregate spend only