MarginWard shows gross margin per customer for AI SaaS. It joins your LLM costs (Langfuse, OpenRouter, or a simple ingest API) with your Stripe revenue, flags customers who are unprofitable, and alerts you the moment one turns red. Free calculator, no signup. Paid plans from $29/mo.
A startup from Paris, France that is founded by Fabien Deshais.
Gross margin per customer
Joins your LLM cost with Stripe revenue to show the true gross margin of every customer.
Unprofitable-customer alerts
Get pinged by email or Slack the moment a customer's token cost crosses the revenue they pay.
Customers to watch
Your accounts ranked by worst margin first, each with a cost-vs-revenue gauge.
Margin by plan
Gross margin grouped by Stripe plan, so you see which tiers actually make money.
LLM cost integrations
Connect Langfuse, OpenRouter, or a simple ingest API to feed in per-customer token cost.
Read-only Stripe sync
A restricted, encrypted, revocable read-only Stripe key, no write access to your billing.
Cost & margin history
Track how LLM cost and margin per customer move over time (up to unlimited history).
Weekly margin digest
A short email summary of your margins and any customer that turned red this week.
Model price overrides
Override per-model token prices to match your real negotiated rates.
CSV export & API
Export margins to CSV or pull them programmatically via the API.
Free margin calculator
A no-signup tool to check any single customer's margin in seconds.
Founders and teams building AI SaaS on flat or subscription pricing, products where LLM tokens are a real per-customer cost. From solo founders to small product teams who need their true unit economics, not just their MRR.
MarginWard is the only tool that joins your LLM costs with your Stripe revenue to show gross margin per customer. Cost-tracking tools show spend; revenue analytics show MRR, neither tells you which customers cost more than they pay. MarginWard does, and alerts you the moment one turns unprofitable.
Observability tools track your LLM spend but don't know your revenue; SaaS analytics track revenue but ignore token cost. MarginWard is built for the intersection, gross margin per customer, with alerts on unprofitable accounts. Read-only Stripe key, plugs into Langfuse/OpenRouter or a simple ingest API, set up in ~15 minutes. Flat pricing, never a percentage of your spend. There's also a free calculator, no signup.
MarginWard was built by a solo founder running his own AI SaaS. One month he realised his biggest customers were also his least profitable, burning more in LLM tokens than they paid, and Stripe never told him. So he built the tool he wished existed: the real margin of an AI product, customer by customer.
Next.js, TypeScript, Supabase (PostgreSQL), Stripe, Vercel, Tailwind CSS, Resend, with Langfuse and OpenRouter integrations for LLM cost data.
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