Virool
The first native video advertising platform. Founded by Alex at age 23, Virool reached a $120M valuation and helped define the modern native-video ad category.

Co-author & Publisher · Forbes 30 Under 30 Entrepreneur
Serial entrepreneur and book publisher. Founder of Virool, Go X, and Kairos. Co-author, publisher, and marketing lead of the #1 Amazon Best Seller The Prayer: Rise with Jesus — now in seven languages.
Alexander Debelov is a Forbes 30 Under 30 honoree, serial technology entrepreneur, and the marketing force behind The Prayer: Rise with Jesus — the #1 Amazon Best Seller and three-time international book award winner he co-authored with Stefania Leão. He is best known in tech as the founder of Virool, the first native video advertising platform, which he started at twenty-three and grew to a $120M valuation, pioneering an entire ad format that reshaped how brands tell stories online.
After Virool, Alex went on to build Go X, a B2B micro-mobility company that won a Fast Company Innovation Award and deployed shared electric vehicles across U.S. campuses and cities, and Kairos, his venture studio for building ambitious technology and brand companies. Across more than a decade of building, he has been profiled across major business press as one of the defining young founders of the native-video era — but the work he is proudest of today is the quietest he has ever done.
On The Prayer, Alex is co-author, publisher, and marketing lead. He took Stefania Leao's original Portuguese manuscript and shaped it into a finished book, restructuring the chapters, writing 25 pages of the hardcover edition himself, and leading the visual identity of the project from cover to typography to the thirty illustrations he created. He then built the marketing engine that carried The Prayer from a single English title to a devotional published in six languages — English, Portuguese, Italian, French, Spanish, and Russian — reaching #1 Amazon Best Seller in English, Portuguese, and Italian, with the remaining editions climbing.
He designed the awards strategy that won the book three international honors, and drove the campaign that brought it to readers in seven languages, including a Chichewa edition that reached churches in Malawi after a pastor there found the book through the press coverage and Alex shipped copies to him directly. The Russian edition, Молитва, he is guiding personally, in tribute to his family's heritage.
Alex is active across digital channels at debelov.com, on LinkedIn, and on X as @adebelov1, where he shares notes from his work, his faith, and his creative practice.
What unites the founder and the publisher is the same impulse: building things by hand, then making sure they reach the people who need them. Whether he is shipping a product, raising a round, or launching a devotional into its sixth language, Alex approaches the work as a craft and a calling. He sees The Prayer as the project that finally married the entrepreneur and the artist in him — a book made the way good companies are made: slowly, with care, and for the reader rather than the writer.

30 Days to Transform Your Life · Christian Devotional · 2025
A 30-day Christian devotional with thirty illustrations by Alexander Debelov, written with co-author Stefania Leão.
The first native video advertising platform. Founded by Alex at age 23, Virool reached a $120M valuation and helped define the modern native-video ad category.
B2B micro-mobility company deploying shared electric vehicles for cities and campuses. Recognized with a Fast Company Innovation Award.
Alex's venture studio for building ambitious technology and brand companies — including the publishing imprint behind The Prayer.
As co-author, editor, and illustrator of The Prayer: Rise with Jesus, Alex's work is part of the same book that has drawn coverage from Christian and international outlets:
TechBullion
Forbes 30 Under 30 founder Alexander Debelov and co-author Stefania Leão reached #1 in three languages, then committed every dollar of royalties to San Francisco’s Tenderloin and a village congregation in Malawi.
Business Insider
Debelov and co-author Stefania Leão used royalties from their bestselling devotional, along with World Cup publicity, to fund free book distribution in rural Malawi and outreach in San Francisco’s Tenderloin.
The Maravi Post
Over 1,000 free Chichewa copies of the #1 bestselling devotional have reached families across Malawi through Pastor Edward Mikwamba’s ministry in Blantyre.
The Christian Post
Church Times
Vision Christian Media
Baptist News Global
UCB Asia Pacific
Revista Pernambuco
基督教論壇報 Christian Tribune
Coverage of the international bestseller The Prayer: Rise with Jesus in Taiwan's Christian press.
Additional international coverage:
Media & rights: Stefania Leão is the primary author of The Prayer: Rise with Jesus. For interview requests, rights inquiries, and press materials, contact her directly at stefanialeao.books@gmail.com.
Alexander Debelov is a Forbes 30 Under 30 entrepreneur, the founder of Virool, Go X, and Kairos, and the co-author, publisher, and marketing lead of The Prayer: Rise with Jesus — a #1 Amazon Best Seller now published in seven languages.
Yes. Alexander Debelov founded Virool, the first native video advertising platform, which reached a $120M valuation. He went on to found the B2B micro-mobility company Go X and the venture studio Kairos.
Alex's primary contribution to The Prayer is publishing and marketing. He edited Stefania Leão's original Portuguese manuscript into a finished book, wrote 25 pages of the hardcover edition, created the thirty illustrations, and built the marketing engine that took the book into seven languages and #1 Amazon Best Seller status in English, Portuguese, and Italian (French and Spanish climbing).
You can reach Alex through his personal site debelov.com, LinkedIn, X/Twitter, or his Amazon Author Page.