Arun Rupesh Maini was born on October 24, 1995, in Nottingham, England. UK corporate filings show his father, Dr Dinesh Kumar Maini, and mother, Malti Maini, as directors of Zenith Cosmetic Clinics Limited, a Nottingham cosmetic-medicine business, alongside Maini’s younger sister, Aanavee Maini, who also sits on that company’s board. Maini has described an older brother as “the entire reason my YouTube channel even started” — it was that brother who gave a 14-year-old Maini his first smartphone, a ZTE Blade, sparking the interest in technology that became his career. As a child, Maini attended a regular English school on weekdays and a Hindi-language school on weekends, before enrolling at the fee-paying Nottingham High School and going on to study economics at the University of Warwick.

Maini’s first business wasn’t YouTube at all. At 12 and 13 years old he ran a small eBay operation reselling Beyblade toys bought wholesale from China, turning a roughly $3-a-unit purchase price into repeat shipments of hundreds of units before an accidental resale of a stolen phone got his eBay account banned, according to his own account in a Mashable interview. He uploaded his first tech video to YouTube in 2011 as a self-described “shy, lanky, acne-prone” teenager, and spent years posting reviews with modest traction. The turning point came in 2015 with a video showing how to build a makeshift 3D hologram projector from a smartphone screen and reflective plastic — a video Maini has said he posted “a little bit drunk” at a party without expecting much, only to wake up the next day to a flood of attention and a request from BBC News. That video remains one of his most-referenced early uploads and marked the moment the channel’s growth curve changed.

By the time Maini finished his economics degree, the channel was growing fast enough that he turned down a roughly £35,000-a-year entry-level job at PricewaterhouseCoopers — where he had completed an eight-week internship — to work on Mrwhosetheboss full-time, as detailed in a Business Insider as-told-to piece. The channel has since grown into one of the largest English-language technology destinations on YouTube, passing 22 million subscribers and roughly 8.9 billion views by August 2026, built on smartphone reviews, brand comparisons and increasingly elaborate stunt videos. In May 2021, Maini signed with talent management company Night Media, joining a roster that included MrBeast and ZHC, per Tubefilter’s report on the signing. In September 2022 he published an investigation into swelling batteries in older Samsung phones that drew corroboration from fellow reviewer Marques Brownlee (MKBHD) and prompted an official Samsung response, adding to his reputation for accountability-style reporting inside the tech-review space. In August 2024, after setting himself the goal of overtaking Apple’s own YouTube subscriber count, Maini and fellow creator Matthew Perks (DIY Perks) built a 2.054-metre working replica of the iPhone 15 Pro Max, earning a Guinness World Record for the largest smartphone replica, per Guinness World Records’ coverage — a record Maini has called a full-circle childhood dream, having grown up poring over Guinness World Record books at his local library. Today the channel operates out of Maini’s London home, run by a full-time team of around 12 people, with his wife, Dhrisha Mehta, serving as the operation’s general manager.

No audited disclosure breaks out what Maini personally earns in a given year, and every third-party estimate below should be read as exactly that — an estimate, not a confirmed figure. Creator-analytics service Hafi.pro models the combined channel-and-social-media operation’s gross revenue (YouTube AdSense plus estimated Instagram and TikTok income) at roughly $13 million to $16 million a year, based on subscriber counts, view volume and engagement data rather than disclosed figures. Sponsorship-tracking site SponsorRadar separately estimates AdSense value alone at $26,000 to $79,000 per video and sponsored-video value at $131,000 to $262,000 per video across an active roster of roughly 20 brand partners. These are gross, algorithm-derived revenue estimates for the channel as a business, not Maini’s personal take-home income — from that gross figure, Boss Global Media Limited (his production company) covers a reported full-time team of around 12 staff, production costs for increasingly elaborate stunt videos, UK corporation tax and other overheads before anything reaches Maini personally.

The clearest documented contract in Maini’s career is his May 2021 signing with Night Media, the Los Angeles-based talent management agency that also represents MrBeast, ZHC, Azzyland and Preston. Terms were not disclosed, but Night Media co-founder Reed Duchscher described entering the tech-creator category specifically because of deals like Maini’s, per Tubefilter’s report. Beyond that management signing, the channel’s day-to-day commercial contracts are individual sponsored-video deals — SponsorRadar’s tracking identifies 76 sponsored placements across roughly 20 distinct brands as of August 2026 — rather than any single large licensing or acquisition contract of the kind seen with brand-sale creators. No sale of the Mrwhosetheboss channel, its intellectual property, or any Maini-founded business has been publicly reported.

Mrwhosetheboss’s sponsorship roster is dominated by consumer-tech and privacy-software brands rather than a single marquee partner. SponsorRadar’s video-content tracking identifies Surfshark (VPN) as his most frequent sponsor with 15 tracked videos, followed by Opera (browser), Insta360 (cameras), Saily (eSIM travel data) and TORRAS (phone cases and accessories), with additional recurring placements from Incogni, ESR, Bitdefender and others — 20 distinct brands and 76 tracked sponsored videos in total as of August 2026. These figures come from third-party analysis of video content rather than confirmed brand or agency disclosures, so exact per-deal values are not public; SponsorRadar’s own modeled range for a single sponsored video, $131,000 to $262,000, is an estimate based on Technology-category sponsorship benchmarks rather than a disclosed rate card.

Maini’s most substantial documented business asset is Boss Global Media Limited, the UK limited company, incorporated in January 2018, that operates the Mrwhosetheboss channel under an advertising and media-representation registration. Maini has been its director since incorporation; his wife, Dhrisha Mehta, joined the board in March 2024 shortly before their marriage, and his mother, Malti Maini, served as a director from the company’s founding until she resigned in July 2024, according to Companies House officer records. Separately, Maini is also the director of Boss Global Properties Limited, a property-investment company incorporated in March 2018 under a “buying and selling of own real estate” classification, which Companies House records show holds an outstanding mortgage charge from Paragon Bank secured against a residential property in Sutton, Surrey, dating to November 2019. No separate tech-accessory manufacturing brand, phone-case company or other consumer-product venture founded or owned by Maini turned up in company records or trade press for this profile — his phone-case and gadget content, including sponsored reviews for brands like TORRAS, reflects paid partnership and review work rather than an ownership stake, so none is claimed here.

Maini’s clearest documented property asset is held through Boss Global Properties Limited, which Companies House filings show carries an outstanding mortgage charge from Paragon Bank PLC, registered in November 2019, secured against a flat in Sutton, Surrey. Maini has also described buying and extensively renovating a family home in London, referred to in his own video titles as his “Dream House,” which doubles as the channel’s production headquarters and, per his September 2025 interview with Mashable, is where a full-time team of about 12 people works alongside him. No purchase price, exact address or independent valuation for that London home has been published in press coverage located for this profile, so none is claimed. No vehicle collection, art holdings or other major personal asset tied to Maini has a reliable public record beyond the Sutton, Surrey property.