KSI, whose full name is Olajide Olayinka Williams Olatunji, is an English YouTuber, rapper, comedian, gamer, and entrepreneur with an estimated net worth of $100 million as of 2025.
Widely recognized as one of the world’s most successful internet personalities, KSI has built an empire that spans YouTube, music, boxing, and business ventures.
Between September 2022 and September 2023 alone, KSI reportedly earned $25 million, placing him among the highest-paid digital creators globally.
Across his three YouTube channels — KSI, JJ Olatunji, and KSIClips — he has collectively amassed over 8.6 billion views. His main channel alone boasts more than 24 million subscribers.
A former member of the renowned YouTube collective The Sidemen, KSI has played a crucial role in growing their multiple channels (Sidemen, MoreSidemen, SidemenReacts, and SidemenShorts) into one of the biggest content networks in the UK.
The name “KSIOlajidebt” originates from his gaming roots — “KSI” from his clan name, “Olajide” from his first name, and “BT” representing British Telecom.
He first gained fame through FIFA gameplay commentary, collaborating with professional footballers like Arsenal’s Alex Oxlade-Chamberlain.
In music, his breakout single “Lamborghini” (featuring P Money) reached #30 on the UK Singles Chart in 2015, paving the way for albums like Dissimulation (2020) and All Over The Place (2021).
He also authored “KSI: I Am a Bellend” — released in the U.S. as “I Am a Tool: How to Be a YouTube Kingpin and Dominate the Internet.”
KSI’s Boxing Career And Logan Paul Rivalry
KSI’s global popularity skyrocketed through his boxing matches with fellow YouTuber Logan Paul. Their first pay-per-view fight in August 2018 — billed as “the biggest internet event in history” — ended in a draw.
The rematch, held in November 2019 at the Staples Center in Los Angeles, drew millions of viewers and earned both fighters millions in prize money and sponsorship revenue.
Their first fight generated approximately $13 million in pay-per-view sales, with over 2.25 million live viewers. KSI’s estimated personal earnings from both fights exceeded $3 million, including merchandise sales and brand deals.
Before that, he also defeated YouTuber Joe Weller by TKO in 2018, a fight that attracted over 21 million views within a single day on YouTube.
Prime Energy Drink And Business Ventures
A major component of KSI’s financial empire is his role in Prime, the viral hydration and energy drink brand he co-founded and promotes alongside Logan Paul.
Since its launch in January 2022, Prime has exploded into one of the fastest-growing beverage brands in the world.
Reports suggest that between December 2022 and December 2023, Prime generated an estimated $565 million in revenue.
While KSI and Logan Paul are not the majority owners, they reportedly hold significant equity stakes, rumored to be 10–20% each, with the parent company Congo Brands holding a controlling interest.
If Prime were valued at $3 billion — based on comparisons to Rockstar Energy’s acquisition by Pepsi — KSI’s share could be worth anywhere from $300 million to $600 million on paper.
Though unconfirmed, this speculation underlines the enormous financial potential tied to his growing business portfolio.
Prime has also attracted endorsements from major sports stars such as Patrick Mahomes, Erling Haaland, and Alexander Volkanovski, amplifying its visibility and credibility worldwide.
Early Life And Family Background
Born on June 19, 1993, in Watford, Hertfordshire, KSI grew up in a Nigerian-British household. His mother, Yinka, is from London, and his father, Jide, hails from Nigeria. He has a younger brother, Deji Olatunji, who is also a popular YouTuber.
KSI attended Berkhamsted School, where he met future Sidemen collaborator Simon Minter (Miniminter).
Despite early family disputes over financial privacy, KSI and his family have since mended their relationship and continued to support each other’s creative careers.
Rise To Fame On YouTube
KSI’s online journey began in 2008 with a channel named JideJunior before launching KSIOlajideBT in 2009. His FIFA gameplay videos quickly gained traction, earning him enough revenue to quit school and pursue YouTube full-time.
By 2012, he surpassed one million subscribers, and a year later, he joined Polaris, a network under Maker Studios. In 2013, he became a founding member of The Sidemen, whose blend of humor, gaming, and challenges captivated millions worldwide.
Although he briefly left the group in 2017, citing creative differences, KSI later rejoined, helping cement the Sidemen as one of the most influential entertainment collectives in online history.
Music Career
Transitioning from gaming to music, KSI has built an impressive discography blending rap, grime, and UK hip-hop. His debut studio album, Dissimulation (2020), debuted at #2 on the UK Albums Chart and #1 in Ireland.
It included hits like “Down Like That” featuring Rick Ross, Lil Baby, and S-X, and “Houdini” with Swarmz and Tion Wayne.
His sophomore album, All Over The Place (2021), topped the UK Albums Chart, with singles such as “Don’t Play” (featuring Anne-Marie) and “Really Love” (with Craig David).
Both tracks achieved Gold certification, solidifying KSI’s reputation as a credible artist in mainstream music.
Charity Work And Personal Life
Outside of entertainment, KSI is a committed philanthropist. He has supported numerous charities, including Comic Relief, Children in Need, and Stand Up To Cancer.
Over the years, he has donated significant funds to causes supporting children, gaming accessibility, food security, and racial equality.
In 2020, he contributed $60,000 to various organizations supporting the Black Lives Matter movement and frequently participates in Sidemen charity football matches, which have raised over £400,000 to date.
A devoted Arsenal FC fan, KSI is also known for his outspoken personality and humor, though not without controversy.
Despite early criticism, he has since matured into a respected figure who uses his influence to inspire creativity and entrepreneurship among youth.
Awards, Recognition, And Real Estate
KSI’s influence has been recognized with numerous awards, including the Diamond Creator Award and Vlogger of the Year by the NME Awards. His single “Lighter” won Best Song at the Amazon Music UK Awards (2020) and earned a BRIT Award nomination.
He has also received multiple Shorty Award nominations and was crowned “Personality of the Year” at the Rated Awards (2022).
Beyond fame, KSI has built a massive property portfolio, owning over ten homes across England worth a combined £10 million. In 2021, he purchased a luxurious £10 million London mansion, reflecting his long-term investment strategy.
Legacy And Impact
From uploading FIFA clips in his bedroom to becoming a multimillionaire global icon, KSI’s rise is a testament to modern digital entrepreneurship. His story embodies the evolution of internet fame — where creativity, risk-taking, and authenticity can redefine success.
Whether in boxing, business, or music, KSI continues to push boundaries, influencing millions and proving that internet fame, when managed with vision, can evolve into generational wealth.
Frequently Asked Questions
How Much Does KSI Earn Per Year?
He reportedly earns between $20 million–30 million annually, combining YouTube ad revenue, brand endorsements, boxing payouts, and business income.
How Much Is KSI’s Stake In Prime Worth?
While unconfirmed, KSI’s share in Prime could be worth between $300 million–600 million, depending on the company’s actual valuation.
Who Is Richer, KSI Or Logan Paul?
Both have similar estimated fortunes, but KSI may have a slight edge due to his diversified income streams and continued Sidemen ventures.
Does KSI Still Own Sidemen?
Yes. KSI remains a core member and co-owner of The Sidemen, contributing to their growing business empire and YouTube success.
Is KSI A Millionaire or A Billionaire?
As of 2025, KSI is a multi-millionaire, not yet a billionaire — though his growing business ventures may soon push him close.
What Companies Does KSI Own?
KSI co-owns Prime Hydration, Sidemen Clothing, and has multiple investments in music, gaming, and property.