Stian Hornsletten: EveryMatrix Co-Founder and Board Advisor

Stian Hornsletten helped build EveryMatrix from a two-person idea into one of the largest B2B iGaming suppliers in the world. He co-founded the company in 2008 with Ebbe Groes, and today he serves as an Advisor and board member after leading nearly every major division the company owns.

His fingerprints are on some of the industry’s biggest supplier deals, including national lottery contracts in Norway, Finland, and Hungary.

Quick Facts

Who Is Stian Hornsletten?

Hornsletten started his career on the operator side of gambling, not the supplier side. In 2001, he co-founded BetOnBet, an online betting exchange. Running that business taught him exactly where operator software fell short, and that frustration became the blueprint for EveryMatrix.

He holds a Computer Science degree, which gave him an edge most commercial executives lack: he can talk to developers and clients in the same meeting without losing either one.

Career Timeline at EveryMatrix

Hornsletten has held more executive titles at one company than most people hold in a career. Here’s how his path has moved:

Each move lined up with what EveryMatrix needed most at the time. When the company needed a commercial push, he ran commercial. When it needed product focus, he ran product.

Major Achievements

Hornsletten’s biggest wins came during his years as CCO and later as head of the Games division.

• SlotMatrix. He drove the concept and launch of this casino content aggregator, which gives operators single-integration access to one of the largest casino game libraries in the B2B market.
• Norsk Tipping and Veikkaus. He secured supplier contracts with Norway’s and Finland’s state lotteries, two of the most tightly regulated wins a B2B supplier can land.
• Szerencsejáték. In 2023, his team beat 24 competitors to power the online sportsbook and casino for Hungary’s national lottery, pairing OddsMatrix with the TippmixPro brand.
• Studio growth. As CEO of the Games division, he expanded EveryMatrix’s in-house studios, Armadillo Studios and Spearhead Studios, plus its third-party content network.

Awards and Recognition

EveryMatrix’s award history tracks closely with Hornsletten’s tenure in product and commercial roles.

That WLA certification matters more than it sounds. It made EveryMatrix the first iGaming supplier ever to earn it, a signal that its responsible gambling controls meet the standard lottery regulators expect.

Before EveryMatrix: The BetOnBet Years

Before any of this, Hornsletten spent seven years running BetOnBet as a B2C operator. That’s the detail most profiles skip past, but it explains almost everything about how he builds product. He wasn’t guessing at what operators needed. He’d lived the pain points himself, and he built EveryMatrix’s API-driven approach specifically to solve them.

FAQ

Who is Stian Hornsletten?

He’s the co-founder and a board Advisor at EveryMatrix, a B2B iGaming technology supplier he built with Ebbe Groes in 2008.

What is Stian Hornsletten’s role today?

He now serves as an Advisor and board member at EveryMatrix, after two years running the Games division as CEO.

Did Stian Hornsletten run a company before EveryMatrix?

Yes. He co-founded and managed BetOnBet, an online betting operator, from 2001 to 2008.

Does Stian Hornsletten own EveryMatrix?

He’s a co-founder and board member with a significant stake, but EveryMatrix remains privately held and isn’t his alone.

What is Stian Hornsletten best known for?

Landing major lottery contracts, including Norsk Tipping, Veikkaus, and Hungary’s Szerencsejáték, and launching SlotMatrix.