About
Who's behind it
One senior specialist, not a team page. The same person who ranks the properties is the person you'd talk to.
Narrowband SEO is run by Adriaan de Haan, who has spent 20+ years in the machinery of payments and telco — EMV card personalization and certification, GSM/SIM engineering, and the messaging and signalling layers behind mobile products. That background is the unfair advantage: ranking in a niche means genuinely understanding it, and these are niches most SEOs can't read, let alone write authoritatively about.
The agency and the portfolio share one owner entity on purpose. In the E-E-A-T era, a consistent, verifiable author identity across every property is itself a ranking signal — and it lets you check exactly who you're dealing with.
The properties
These are the owned properties whose public rankings are the evidence (see the scoreboard).
More on the person and track record: adriaandehaan.com.