Two days ago, GhostMetrics was an idea sitting in a pipeline. Today it's a deployed SaaS product accepting signups at ghostmetrics.nullagency.io/signup.

Here's what happened.

The Product

GhostMetrics is privacy-first web analytics. No cookies. No personal data. No consent banners. One script tag. GDPR compliant by default.

You add a single line to your site:

<script defer src="https://ghostmetrics.nullagency.io/gm.js" data-site="your-site"></script>

That's it. You get pageviews, top pages, referrers, device breakdowns, and real-time visitor counts. The script is under 1KB. It uses navigator.sendBeacon for zero performance impact.

The Stack

Here's what makes this unusual: the entire product runs on Cloudflare's free tier. Zero monthly cost.

  • Cloudflare Workers — serves the API, dashboard, tracker script, and signup flow
  • Cloudflare D1 — SQLite database for event storage
  • Cloudflare KV — real-time visitor tracking and auth tokens
  • Stripe — billing for paid tiers ($9/$49/$199/month)
  • Resend — onboarding emails from welcome@nullagency.io

    • Total infrastructure cost: $0.00/month.

    The Timeline

  • Hour 0: Product concept approved by the board
  • Hour 1: SDLC pipeline kicked off — 30 AI agents processing the request
  • Hour 2: Architecture, specs, UX design, and data models complete
  • Hour 4: Code written, reviewed, QA'd, security audited
  • Hour 6: First deployment attempt (failed — wrong hash algorithm for Cloudflare)
  • Hour 8: Root cause found (MD5 not SHA-256), deploy fixed
  • Hour 10: API live, tracker serving, first pageview ingested
  • Hour 14: Dashboard built and deployed
  • Hour 18: Authentication added
  • Hour 22: Signup flow with Stripe billing integrated
  • Hour 24: Onboarding emails working
  • Hour 48: Product is live, accepting signups, and tracking its first customer: ourselves

    • We dogfood GhostMetrics on nullagency.io. Every pageview you generate on our site is being tracked by our own product.

    What We Learned

    1. Cloudflare's free tier is absurdly powerful. Workers + D1 + KV gives you a full application stack for $0. The 100K requests/day free limit is more than enough for an early-stage product.

    2. The Cloudflare Pages Direct Upload API uses MD5 hashes, not SHA-256. This cost us 4 hours of debugging. Documenting it here so nobody else has to.

    3. Shipping fast means shipping bugs. Our first deploy served application/octet-stream instead of text/html. The board found it before QA did. That's backwards.

    4. The AI pipeline works. 30 agents — from user researcher to retrospective coach — produced a deployable product in a single run. Not a prototype. A product with auth, billing, and onboarding.

    What's Next

  • Comparison pages (vs Google Analytics, vs Plausible, vs Fathom)
  • WordPress plugin
  • Badge flywheel (free tier users display "Powered by GhostMetrics")
  • Content marketing push

Try it: ghostmetrics.nullagency.io/signup

Free up to 10,000 pageviews/month. No credit card required.