Service

We build the things, not just audit them.

Most SEO agencies hand you a report and disappear. We also write the code. Performance engineering, schema at scale, migrations without traffic loss, and one shipped SaaS product we built ourselves: Statable, a privacy-first analytics platform competing with Plausible.

Real CWV — keyarg.com p75
INP
<100ms
good
LCP
552ms
good
CLS
0.01
good
// schema chain we ship on every page
"@type": "SoftwareApplication",
"author": {
  "@type": "Organization",
  "sameAs": ["linkedin.com/..."]
}
Field data from our own site — tested with our INP profiler

What we build for clients

Six tracks. Same shape as our audits, but with the rewrite happening in your codebase, not in a deliverable PDF.

Performance engineering

INP-first work on sites that pass Lighthouse but fail real-user data. Hydration cost on React, Next and Nuxt. 43% of sites silently fail INP in 2026, mostly here.

Schema at scale

Generated JSON-LD with QA gates and automated validation. Not hand-rolled markup that drifts the moment a dev touches a template.

Migrations

301 maps, render verification, CrUX baselines, IndexNow integration. We've done enough of these to know where they break before they break.

Custom dashboards

Embedded analytics from Statable, live SERP volatility views, citation-share dashboards. For clients who need their own data on their own infrastructure.

Consent-free analytics

Statable runs cookieless by default, daily-rotated anonymous IDs, no consent banner needed. The Dutch DPA position on GA4 has made this a real business decision, not just a clean-stack preference.

EU-hosted infrastructure

Hosting and pipeline setup on EU providers (Hetzner DE, TransIP NL, Scaleway FR). Schrems-proof, GDPR-clean, no US data-transfer exposure for your clients in 2026.

About Statable, our own product

What it is

A privacy-first web analytics platform we built and ship. Direct competitor to Plausible and Fathom, free for educational and open-source projects. Live at statable.com.

Why we mention it on a services page

It's proof that we run real production code, not just slide decks. The same engineering practices we apply to client builds are what produced Statable: sub-2 KB tracking script, cookie-free visitor IDs, GA4 OAuth migration with mixed-data engine, embeddable widgets. If we tell you we can build something, we have built something.

How clients use it

Three patterns: replace GA4 to avoid the Dutch DPA cookie-banner issue, embed live-users and country widgets for marketing pages, or hook Statable's API into custom dashboards that combine SEO and product analytics in one view.

Tools and methodology

Free instruments and reading material from the engineering side of Key Arg.

INP profiler

Real-user CrUX data for INP, LCP and CLS. Mobile and desktop side by side, p75 over 28 days.

Hreflang validator

Parses your hreflang block, BCP 47 codes, return-link mismatches on up to 10 alternates.

The method

Our four-step engagement framework: Identify, Engineer, Position the Argument, Measure Citation Share.

Bring us a build, not just a brief

Best fit: teams that already have a clear technical need (INP, migration, schema, dashboards) and want senior engineers, not staffed-out juniors. Tell us what you're trying to build, we'll come back with a scoped quote within two working days.