How do you choose a sonic branding agency?
Judge on four things: whether they start with strategy or straight into music, whether the work in their portfolio still sounds like the brand it was made for, whether they hand over guidelines and ownership, and whether the people who pitch are the people who produce. Price is the fifth question, not the first.
Why this is harder than choosing a design agency
Visual work can be judged in a gallery. You look at a logo, you form an opinion.
Audio doesn't work that way. A showreel is engineered to sound good: mixed loudly, cut to the best eight seconds, scored against footage that was already emotive. Almost anything survives that treatment. So the reel tells you a studio can produce, which was never in doubt. It tells you nothing about whether they can build a system that holds up when a junior marketer three years from now needs a fifteen second cutdown for a channel that didn't exist at launch.
That's the actual job. Here's how to test for it.
The five categories of supplier
| Type | Typical range | Strong at | Weak at |
|---|---|---|---|
| Automated platform | €200 – €2,000 | Speed, cost | Strategy, distinctiveness, rights |
| Freelance composer | €1,000 – €10,000 | Craft, direct contact | Systems, documentation, scale |
| Specialist sonic branding studio | €15,000 – €60,000 | Identity systems, guidelines, rollout | Very large multi-market research |
| Full-service music agency | €20,000 – €80,000 | Breadth, campaign volume | Focus; sound can be one line of many |
| Global brand consultancy | €60,000+ | Research, multi-market testing | Cost, speed, seniority on the actual audio |
Ranges reflect published guides from Supadark, WithFeeling and BrandMusiq, 2025–2026.
Most brands overshoot. A company with one product, one market and a video first channel mix does not need multi-market audience testing. It needs a distinctive asset and a document explaining how to use it.
The eight questions worth asking
1. What happens in the first two weeks? Strategy led studios spend that time on discovery: your brand, your competitors, and an audit of every touchpoint where sound already appears. If the answer is "we'll send you some demos", you're buying music, not an identity.
2. Can I hear a sonic logo you made three years ago, still in use? The hardest question in the industry. Plenty of beautiful identities were launched and quietly abandoned. Longevity proves the guidelines worked and the client could run the system without the agency in the room.
3. Who owns the master, and who owns the composition? Different things. You can own a recording while somebody else controls the underlying work. Get both in writing before signing anything. A studio that gets vague here is a studio you'll be renegotiating with.
4. What's included in usage rights, and for how long? Territories, channels, duration. This drives the price more than production time does. "Broadcast, worldwide, in perpetuity" and "one Dutch social campaign" are the same studio hours and very different products.
5. Are guidelines part of the deliverable or a separate quote? If separate, budget for it anyway. Without documentation the identity lasts as long as the person who commissioned it stays in the job.
6. Who does the work? Ask whether the people in the pitch are the people producing. In small studios they are. In large ones they frequently aren't, and that gap is where quality quietly leaks.
7. How do you test it? Not necessarily formal research, but somebody should be checking the asset through a phone speaker, in a noisy room, at the end of a fifteen second cutdown. At Studio ZK we test until it holds up in a shop, on a phone and on television, because those are the three places it actually gets heard and they behave nothing alike.
8. What happens after delivery? Rollout support, cutdowns for new formats, refreshes. An identity is a system with a maintenance profile, not a file you receive.
Red flags
A reel with no named clients. Either the work is under NDA, in which case they'll say so, or it isn't theirs.
Pricing without scoping. A studio quoting a sonic logo before asking about usage rights is guessing, and the correction will come later.
Everything sounds like the studio. Scroll a portfolio and ask whether the tracks sound like different brands or like one production style applied repeatedly. A house sound is a warning, not a signature.
No process page. If they can't describe how they work, they'll improvise on your budget.
Guidelines as an upsell. Tells you they think of the identity as a deliverable rather than a system.
What good procurement looks like
Shortlist three studios of the same type. Comparing a freelancer against a global consultancy produces a spreadsheet where the cheapest wins on price and the largest wins on everything else, and you learn nothing.
Give all three the same brief, including the awkward parts: the channel you're unsure about, the internal stakeholder who thinks sound is a waste of money, the timeline that's tighter than you'd like. How a studio handles the awkward parts of a brief predicts more than how it handles the flattering parts.
Ask each for one reference from a project that ran into trouble. Everyone has one. What you're testing is whether they'll tell you about it.
Do you need an agency at all?
Sometimes not. If you need one track for one campaign with no ambition to build a system, a freelance composer is faster and cheaper, and any studio being honest will say so.
The case for a specialist studio starts when sound needs to be consistent across more than two touchpoints, or when the asset needs to outlive the campaign that funded it. That's a systems problem, and systems are what a specialist sells.
Choosing in the Netherlands specifically
The Dutch market has more genuine specialists than its size suggests: a handful of dedicated sonic branding studios in and around Amsterdam, several established music for advertising houses, and since 2025 international agencies opening local offices.
Practically, that means you can shortlist three studios that all work in Dutch, understand the local media landscape and can be in a room with you, without defaulting to London or New York. For a brand that also needs the work to travel internationally, ask specifically about broadcast delivery specs for the markets you're in. The technical requirements differ, and finding out at delivery is expensive.
The short version
Ask what happens in the first two weeks. Ask to hear something still in use after three years. Get ownership and usage in writing before signing. Check the people who pitch are the people who produce. Then talk about price. If you want to see how we answer those eight questions, our sonic branding service page walks through the process, and the pricing guide covers the numbers.