Company
Easy. Convenient. Secure.
About us
Seal One AG, based in Frankfurt am Main, is an innovative company which specialises in the development and marketing of user-friendly security solutions.
Mission Statement
Seal One provides a user-friendly process for digital signatures in online transactions.
Companies can use the Seal One Framework for almost all business transactions with their customers.
Seal One enables companies to carry out secure transactions.
Seal One's customers are our partners; however, our partners' customers do not necessarily have to be Seal One customers themselves.
Seal One’s business purpose is to provide the “pen” that enables customers to sign transactions securely.
The Seal One Framework is designed to support multiple partners.
Every Seal One hardware device works with the applications of all partners that support Seal One hardware. End customers need only one hardware device.
The company is led by Jürgen Weiß and Maik Stohn, two experienced board members who were involved in the early development of online banking and have been working for various major banks for many years.
Seal One AG was founded in 2009 and has set itself the aim of replacing outdated TAN-based solutions with modern, user-friendly signature solutions whilst at the same time enabling new business models based on this infrastructure.
Reference Customers
BestSign has been available at Deutsche Bank AG since August 2025. Enjoy the highest level of security when authorising payments and orders, either using the Deutsche Bank app or a Seal One hardware device – easy, convenient and secure.
Since 2011, customers of Postbank – a branch of Deutsche Bank AG – have been able to conveniently carry out online transactions by using the Seal One method with Seal One hardware devices, the BestSign app or the Postbank app.
Since May 26th 2025, norisbank customers have been able to use BestSign with Seal One hardware devices or the Norisbank app for easy, convenient and secure banking.
Since the new DKB app became available in August 2021 and the associated launch of the new modern banking service, DKB customers have been using the Seal One procedure both to log in and to authorise transactions in an easy, secure and convenient way.
Since October 2025, Baader Bank has been offering the option of using two-factor authentication based on Seal One security technology. This makes it even easier to approve transactions.
Since the launch in spring 2018, VERIMI has been using Seal One technology to pursue the goal of creating the most secure and user-friendly platform of trust for identity services and payments across Europe.
Since 2019, customers of FYRST - a Deutsche Bank AG offering - have been able to do online banking in an easy and convenient way by using the Seal One method, with Seal One hardware devices or the FYRST app.
Since November 2023, MorgenFund GmbH has been offering its customers and DWS customers a modern banking app that enables the direct approval of transactions in an easy, convenient and secure way.
Since mid-2021, customers of FNZ Bank AG, formerly ebase®, and its brands Fintego, Finvesto, etc. have been able to approve transactions using the FNZsecure app or Seal One hardware devices in an easy, convenient and secure way.
Since 2023, clients of Aareon AG have been able to approve payment transactions in Wodis Yuneo using the BK01 Secure app or alternatively Seal One hardware devices via "BK01 Integrated Signature".
Seal One AG is a wholly owned subsidiary of NOVOSEC AG
NOVOSEC is a team of experts with in-depth knowledge of IT security and a thorough understanding of security mechanisms and standards. You can rely on NOVOSEC AG to ensure the security of your electronic business transactions and to meet your specific requirements.