SEON exists because its founders ran a cryptocurrency exchange that was being defrauded. Tamás Kádár and Bence Jendruszák built an internal system in 2016–2017 that scored users on their digital footprint — feed it an email, phone number or IP, and it returns what social accounts that email is registered on, how old the number is, what the device looks like, and dozens of other signals correlated against fraud outcomes. They then realised the anti-fraud system was worth more than the exchange, wound the exchange down, and launched SEON as software in 2017 in Budapest.
The digital footprint approach is the differentiator. Where Featurespace and Sardine emphasise behavioural biometrics and Feedzai sells enterprise transaction decisioning, SEON's core signal is enrichment: whether a person leaves the digital residue a real person leaves, returned in around 200 milliseconds. It layers AML screening and transaction monitoring on top, positioning as a single command centre for fraud and compliance. More than 5,000 businesses use it, including Wise and Revolut, and the company claims 15 million transactions secured daily.
The funding history is the clearest marker of Hungarian fintech's arrival. SEON's 2021 Series A of €10 million was the largest in Hungary's history — with angels including founders of N26, SumUp, Tide, Onfido and ComplyAdvantage — followed by a $94 million Series B led by IVP in 2022 at a $500 million valuation, and an $80 million Series C led by Sixth Street Growth in September 2025. Total funding stands at $187 million. The honest caveat for a European directory: SEON's headquarters is now Austin, Texas, with Budapest as its engineering base and London also in the mix. It is a Hungarian-founded company that has followed its growth market to the US, which is worth stating plainly rather than glossing.