SEON

Assessment

SEON is used by online businesses that lose money to fake sign-ups, account takeovers, bonus abuse, and chargebacks, and by fintechs that also need AML screening and transaction monitoring. It checks an email address, phone number, IP address, and device against more than 1,100 first-party data signals and returns a risk score in real time, with rules a fraud team can edit itself. The Starter plan is posted at $699 a month for 2,500 fraud checks, 10 users, and 50 custom rules; the Premium plan with case management, AML, and unlimited API calls is priced on request. Its main competitors are Sardine, Feedzai, Oscilar, and Featurespace.

Tamás Kádár and Bence Jendruszák founded SEON in Budapest in 2017 after fraud attacks nearly sank the cryptocurrency exchange they ran as students. It now serves more than 5,000 businesses, secures more than 15 million transactions a day, and has more than 400 staff across the Americas, Europe, and Asia Pacific. It added AML screening and monitoring, launched identity verification in January 2026, and opened its data layer to outside AI tools in June 2026.

It fits a digital business that wants to start small and grow into a fuller fraud and compliance stack. It is a weaker fit for a large bank that wants an enterprise transaction monitoring system tuned for correspondent banking.

Rating by criterion

We score each of the eight criteria out of 100.

Sector criteria

Vendor criteria

Against its peers

These are the other companies in KYC, AML and identity, with their ratings.

User comments

These buyer-oriented points draw on SEON’s pricing page, its company page, and its Series C announcement.

• Upside

  “We started on the posted plan and had risk scores running on sign-ups within days.”

• Upside

  “Email and phone footprint checks caught fake accounts that our old rules missed.”

• Downside

  “Case management and AML are on the custom plan, so the full stack needed a quote.”

Where customer reviews couldn't be found, our analysts attempted to give a voice to buyer sentiment, drawing on real information from review sites, forums and product documentation. We omit sites where vendors pay to be featured or pay for a review, plus any review the site flags as incentivized.

Based on: SEON pricing; SEON about page; SEON Series C announcement.

Fact file

Competitive landscape

Fraud prevention and AML platforms a digital business would compare with SEON.

• SEON81
• Sardine77
• Feedzai77
• Unit2176
• Featurespace75
• Resistant AI74
• Oscilar71

Comparisons

• SEON vs Sardine: Features, Coverage and Pricing Compared (2026)

Key leadership

• Tamás Kádár

Tamás Kádár co-founded SEON in 2017 and is chief executive. He started it with Bence Jendruszák, now chief operating officer, after fraud hit the cryptocurrency exchange they built as students.

How this review was created

This profile gives our own assessment of SEON to companies selecting a KYC, AML & identity provider. The Fintech Index receives nothing for featuring a firm, for sponsorship, or for advertising, and SEON gave us no payment for the profile.

The rating equals the average of eight criteria, with every criterion running from 0 to 100. Four address buyer needs in this sector, and four address the company together with its commercial terms.

Ratings are our editorial judgment, made from public information: pricing and legal pages, product documentation, compliance disclosures, public reviews and filings. Fact-checking took place on November 12, 2026.