Arun Maini, known online as Mrwhosetheboss, is the UK's largest tech YouTuber with over 22 million subscribers and 8+ billion views. Born in Nottingham to Indian-origin parents, he turned down a PricewaterhouseCoopers offer after earning a First Class Economics degree from the University of Warwick to pursue YouTube full-time. He holds a Guinness World Record for the largest smartphone replica, has won two Streamy Awards for Technology, and is recognized globally for his witty, authentic reviews of smartphones and gadgets. He married Dhrisha Mehta in June 2024 and the couple are expecting their first child in August 2026.
Lewis Hilsenteger is the Canadian creator behind Unbox Therapy, one of YouTube's largest technology channels with over 25 million subscribers and nearly 5 billion total views. Known for his authentic, unscripted reactions to gadgets and consumer electronics, he rose to global fame in 2014 with the viral 'iPhone 6 Plus Bend Test' video that sparked the worldwide 'Bendgate' controversy. Beyond YouTube, he runs a second channel 'Lew Later,' founded Latercase — a minimalist smartphone case brand using aerospace-grade aramid fiber — and has collaborated with brands including Samsung, Apple, Google, and Intel.
Linus Sebastian is the co-founder and Chief Vision Officer of Linus Media Group (LMG), the Canadian digital media company behind Linus Tech Tips - one of YouTube's most-watched technology channels with 16+ million subscribers and 9.2+ billion views. A college dropout who turned a side gig filming product videos for computer retailer NCIX into a media empire, Sebastian built LMG into a ~120-person company operating multiple YouTube channels. Known for his ADHD-fueled energy, hands-on gear reviews, and the occasional on-camera equipment drop, he stepped back from the CEO role in 2023 to focus on creative vision while his wife Yvonne Ho co-runs the business.
Mark Rober is a former NASA Jet Propulsion Laboratory engineer who spent seven years working on the Curiosity rover before becoming one of YouTube's most-watched science communicators with 77+ million subscribers. He founded CrunchLabs in 2022, an edtech company delivering hands-on STEM subscription boxes for children, and has helped raise over $94 million across three viral philanthropic campaigns (Team Trees, Team Seas, Team Water). In 2026 he invested $60 million to build Class CrunchLabs, a free STEM curriculum for teachers.