Denis Yurchak

Denis Yurchak

I build products and write on X.

People using my apps:
33,247

Things I've Built

These sites make money while I sleep until 10 AM.

eSIMPal logo

eSIM for nomads in 150+ countries: unlimited hotspot, add unlimited countries without reinstalling, automatic country changes when crossing borders. Interface so simple, your grandma will get data to swipe grandpas on Turkish Tinder in 2 minutes.

Users:
977
Yadaphone logo

Skype closed in 2025. I built an alternative in 2 days and grew it to 10,000 users in 6 months. People use it to call banks and government services abroad, businesses use it to call their leads, and I use it to call the accountant (he still doesn't respond).

Users:
32,270
Anki in the Browser logo

Free Anki right in the browser: real SM-2 spaced repetition, ready decks for Chinese Hanzi and Japanese Kana, and import of any .apkg deck, parsed and stored entirely on the user's device. No account needed.

Lingobrew logo

Designed and built a B2C platform for language learning. Scaled from 0 to 1000 monthly active users. The platform handles aggregation from 50 RSS news feeds in 10 different languages with translations, audio generation and AI-powered content sorting.

PhotoshootPro logo

I cloned PhotoAI, translated it to German, translated it back to English, and started marketing. Then it made my first internet $. Most people used it to generate nudes.

Media Appearances

Interviews, features, and stories about my entrepreneurial journey.

Video

YouTube

Starter Story Interview

How I built a Skype alternative and grew it to 4500+ paying customers and 14k MRR in 6 months

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Video

YouTube

The Founder's Gambit Interview

He Built 15 Failed Products, And Now Makes $17K/Month

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ArticleGerman

brutkasten

Featured in brutkasten, leading Austrian startup magazine

Ten Times Failed and Burned Out - Now Viral and Profitable with Skype Alternative

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ArticleGerman

Wiener Wirtschaft

Featured in Wiener Wirtschaft, Austrian business magazine

Browser-based telephony from Vienna. Denis Iurchak developed Yadaphone out of personal need as a Voice over IP service; this year an eSIM card solution followed.

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ArticleRussian

Holod

Featured in Holod, independent Russian media

A Russian clones Skypeand gets rich

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ArticleRussian

Captain Works

Featured in Captain Works, indie builders community

$17K/month after one year: a case study on launching a Skype alternative

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ArticleRussian

Baza Education

Featured in Baza Education, startup education platform

How a developer launched a $14K/mo SaaS based on a single feature from the discontinued Skype

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