How we calculated: Wantzel AI Studio next to a building partner
The use case puts the three-year costs of Zilverlinde side by side: an adviser with forty clients a month. Here is how that amount is built up, which assumptions are in it and where the prices come from, and the same sum for other numbers of clients.
The sum for other numbers
Every client does two video checks: at registration and when agreeing to the advice report. Every check is 1 I/O credit, and the EUR 20 base includes 2,000 I/O credits a month; even 250 clients a month (500 I/O credits) stay far within it. Amounts per year, excluding VAT, rounded.
| 10 clients a month | 40 clients a month | 100 clients a month | 250 clients a month | |
|---|---|---|---|---|
| Identifications a year | 240 | 960 | 2,400 | 6,000 |
| With Wantzel AI Studio | ||||
| Studio (publishing the app is part of it) | EUR 240 | EUR 240 | EUR 240 | EUR 240 |
| I/O credits a month (2,000 included) | 20 | 80 | 200 | 500 |
| More I/O credits (EUR 20 per 2,000) | EUR 0 | EUR 0 | EUR 0 | EUR 0 |
| Your own AI account (estimate) | EUR 240 | EUR 240 | EUR 240 | EUR 240 |
| Per year | EUR 480 | EUR 480 | EUR 480 | EUR 480 |
| Three years | EUR 1,440 | EUR 1,440 | EUR 1,440 | EUR 1,440 |
| With a building partner and separate services | ||||
| Build (one-off, year 1) | EUR 20,000 | EUR 20,000 | EUR 20,000 | EUR 20,000 |
| Own hosting and operations | EUR 600 | EUR 600 | EUR 600 | EUR 600 |
| Verification service (market average) | ≈ EUR 480 | ≈ EUR 1,920 | ≈ EUR 4,800 | ≈ EUR 12,000 |
| Maintenance (from year 2) | EUR 3,000 | EUR 3,000 | EUR 3,000 | EUR 3,000 |
| Year 1 | ≈ EUR 21,080 | ≈ EUR 22,520 | ≈ EUR 25,400 | ≈ EUR 32,600 |
| Years 2 and 3, per year | ≈ EUR 4,080 | ≈ EUR 5,520 | ≈ EUR 8,400 | ≈ EUR 15,600 |
| Three years | ≈ EUR 29,240 | ≈ EUR 33,560 | ≈ EUR 42,200 | ≈ EUR 63,800 |
| Difference over three years | ≈ EUR 27,800 | ≈ EUR 32,120 | ≈ EUR 40,760 | ≈ EUR 62,360 |
How it is built up
- Wantzel AI Studio, per year = 12 × EUR 20 for the studio (publishing the app is part of it) + 12 × EUR 20 for each started 2,000 I/O credits above the 2,000 included (none here) + your own AI account. Building and hosting are included; a change is a new question to Claude.
- Building partner, year 1 = build + hosting + verification. Years 2 and 3 = 15% of the build for maintenance + hosting + verification.
- Verification = identifications per year × EUR 2, the average of the market solutions. Monthly minimums and annual contracts that many services ask for are not included.
The assumptions and where they come from
| Price of Wantzel AI Studio | EUR 20 a month for one user with 2,000 I/O credits included (every operation is 1 I/O credit, a video verification too), EUR 20 for each further 2,000 I/O credits, no contract |
| Your own AI account | The AI runs on the client's own account; estimated at a Claude subscription of about EUR 20 a month |
| Build hours | 200 hours for an app with sign-in, calculations, pages and two connected services (an assumption, and a modest one: published price guides put custom web apps from around USD 40,000) |
| Hourly rate | EUR 100, the middle of EUR 75–125 for Dutch web agencies, from published price guides |
| Hosting and operations | EUR 50 a month for your own server with backups, certificates and updates (an assumption) |
| Maintenance | 15% of the build per year, from year 2 (a common rule of thumb, an assumption) |
| Verification | The average of the published prices of common verification services: from about USD 0.80 to USD 5 a check, on average ≈ USD 2.40, counted as EUR 2 a check |
| What is not in it | The adviser's own hours (in both cases), VAT |
Example, 40 clients a month: 80 verifications are 80 I/O credits, within the 2,000 included, so no extra cost. Prices seen on 7 October 2026. Indicative: a real quote from a building partner or a service can come out higher or lower.