- Proko has 4.38 million YouTube subscribers, built on free drawing lessons Stan Prokopenko started publishing in 2012
- Forbes reported in May 2021 that more than 80,000 of his then-2.2 million subscribers were paying for premium instruction on proko.com
- Proko ships four software tools, including Skelly at $6.99 once and Zolly free with $4.99 model packs
- Every course page carries the same FAQ line: "It's not a subscription."
- Drawing is a daily practice. The products his students open daily are the cheapest things he sells

Our work
How Kristen Donathan Turned Stain-Removal Content Into Stain Fix
Kristen Donathan gets the same stain questions on repeat. So she and Built by Foundry made Stain Fix: photograph the spill, get her step-by-step plan for that exact surface.
Read the case study → (opens in a new tab)Who Is Stan Prokopenko?
How Did Proko Go From $40 a Month to a Studio?
What Has Proko Actually Built?
| Proko tool | Platforms | Price | What it does |
|---|---|---|---|
| Skelly | iOS, Android | $6.99 once | Poseable anatomy model |
| Zolly | iOS, Android, Windows | Free, packs $1.99 to $4.99 | Perspective drawing practice |
| Timer | Web | Free | Timed sessions from photo reference |
| Value Study | Web | Free | Reduces an image to limited values |
Why Does the App You Open Daily Cost $6.99 Once?
The Number Proko Has Never Had
| Model | 20,000 customers, month 1 | Month 12 | Month 36 |
|---|---|---|---|
| $6.99 once, 15% commission | $118,830 | $0 | $0 |
| $6.99/month, 15% commission | $118,830 | $118,830 | $118,830 |
| $59.99/year, 15% commission | $1,019,830 | Renews | Renews |
A course finishes. A practice does not.
See What We’d Build You →
If You Teach a Skill People Practice Daily
What Creators Can Learn From Proko
Your audience is already practicing. Charge them for it. Built by Foundry builds the app, ships it to the App Store in three weeks, and runs it forever. $0 upfront. You own the business.
See What We’d Build You →



