Blog

Notes from building Stax.

Why I'm shipping what I'm shipping, what the research turned up, what I'm getting wrong. One post when there's something worth saying — not on a content calendar.

My AI bill is roughly five tabs and a gut feeling. I have asked finance twice to put together a single number and both times it took two weeks and was already out of date.

— paraphrased from a CTO of a 40-person startup, r/startups
~300
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recurring complaints
Founding post · featured

Why I built Stax: 4 weeks reading Reddit, one product.

I read a few hundred posts from founders and CTOs complaining about their AI bill. The same three problems kept showing up — invisible subscriptions, unreadable UIs, and the absurdity of cost-tracking software that is itself variable-cost.

May 11, 2026 · 4 min read Read the post →

Stax is ready — here's what we shipped.

Where the product is right now: native integrations for OpenAI, Anthropic, Cursor, and GitHub Copilot; CSV upload for the rest; team invites, billing alerts, audit log, account deletion. Plus what's intentionally not built yet.

What GitHub Copilot costs after June 1.

The agent-mode developer's math worked example. Three real usage patterns, applied to GitHub's published per-call rates, with the seat cost added back in. The forecast you can't get from any dashboard yet.

GitHub Copilot moves to usage-based billing on June 1 — what your team needs to do.

Flat $19/seat becomes fixed-seat-plus-AI-Credits on June 1. Light users get slightly cheaper; mixed and power users can easily double or triple. Here's the cost-shift, who feels it, and three things to do this week.

Drafting

Next up.

topics, not promises · in waitlist order
Pricing ~ jun 2026

Why flat pricing is a bet, not a marketing line.

The math behind $49 regardless of usage, what breaks if usage triples, and what I'd do before raising the floor.

Build notes ~ jun 2026

How I'm shipping the first eight providers in fourteen days each.

The provider matrix, the auth-by-auth-method trade-offs, and the one provider I'm dreading.

Research ~ jul 2026

The reddit threads that didn't make the brief.

What I cut from the founding research and why — including one complaint I almost mistook for a fourth pillar.

Security ~ jul 2026

Storing customer API keys without losing sleep.

The envelope-encryption setup, why KMS rotation is the boring part, and the one mistake I almost shipped.

New posts to your inbox before anywhere else.

The waitlist is the mailing list. One email per post, no marketing fluff, no funnel.

See your real AI bill in four minutes.

3 providers, 30 days of history, no card required. First 100 sign-ups lock in $29/mo flat — forever.

No credit card · 4-minute setup · SOC 2 in progress