ABOUT
Why we're called Overtone
Strike a piano key and you hear one note. What you actually hear is a stack of frequencies: the fundamental, the note's one true pitch, and above it the overtones, quieter frequencies that give the sound its color and warmth. The fundamental makes it a note. The overtones make it that note. Strip them away and the sound still works; it just stops meaning anything.
Businesses are built the same way. Every good one has a fundamental: one true reason it deserves attention. And around it sits a layer that decides whether people feel that reason or scroll past it: the words, the type, the speed of the site, the way the tools behave. A hundred small judgments that either add up to character or don't.
That layer is what we build.
Find the fundamental. Build the overtones.
Anyone can generate.Knowing what to keep is the job.
We use AI every day and talk about it plainly. It drafts, renders, and codes at a volume no studio could match five years ago, and in doing so it made one thing scarce: judgment. When anyone can produce two hundred options, the work is choosing the one that's right, and knowing why. AI is an instrument, not the musician. We play it hard. It doesn't decide what's good.
You could prompt the machine yourself, and some of our clients do. What we bring is the other half of the conversation: pulling out what you actually mean, phrasing it so a machine can act on it, and reading why an iteration missed so the next pass fixes the cause instead of rolling the dice again. Your ear gives the verdict. Ours does the navigation. Fluent in both languages.
BELIEFS
Eight beliefs we build by
- 01
Working is the baseline, not the goal.
Function is the floor. Shipping something that works earns the right to compete. Nothing more.
- 02
Every business has a fundamental.
One true reason it deserves attention. Our first job is finding it, not decorating around its absence.
- 03
Taste is the scarce resource now.
When making more is cheap, choosing better is the advantage.
- 04
AI is an instrument, not the musician.
We play it hard. It doesn't decide what's good.
- 05
One mind, many frequencies.
Brand, web, and tools from one principal, the reason everything matches.
- 06
Restraint is a feature.
What we leave out is a deliverable. The right amount is a spec.
- 07
Show, don't claim.
Live work over adjectives. This site is the evidence, not the advertising.
- 08
The ear can't be automated.
Whether a piece lands is felt, not computed. The last pass on everything we ship is a human, feeling for the landing.
THE PRINCIPAL
The person you meet
I'm Frank Thijssen, and Overtone is my studio. I've been writing software since 1986, when I was thirteen, and building for the web since 1995. Design is the other half of my training: branding, UI/UX, animation, photo work, sound design. Along the way I spent years leading teams inside tech companies, which taught me how software actually gets finished. And music runs under all of it. I've spent a lifetime at the keys, playing everything from jazz to gospel, and the studio takes its name from the overtones: the frequencies that ring above a note and make it rich. Same pitch, more music. That's what I'm after in everything I build. Dutch by birth, Phoenix by choice.
I lead every project myself, the way a producer runs a session: the instruments play the parts, and I supply the direction, the judgment, and the last pass. The AI is one of the instruments, and I push it hard. No account managers, no junior handoffs. Who you meet on the first call is who makes every call after it. When a project needs a photographer, an illustrator, or a specialist trade, I bring in people I trust and stay accountable for the whole.
Who it's for
Owner-led businesses: the kind where the person who signs is the person who cares. Any industry. Phoenix first, though the work travels well.
Twenty minutes with Frank Thijssen. A straight answer either way.
Book a 20-min call