$1.3M Pre-Seed Investment to Power Theodosian’s Mission to Reinvent Cybersecurity and Tackle Data Breaches
Written by Christina Levada
Theodosian was created by experienced cybersecurity operators who have spent over a decade analysing corporate security spending and risk across industries ranging from military and intelligence to banking and healthcare. The company was born from the recognition that businesses need a second layer of defense: persistent, per-file protection that stays with the data, no matter where it moves. For Chief Information Security Officers (CISOs), the stakes have never been higher - with escalating regulatory requirements, growing liability for compliance failures, and the mounting costs of breaches, which now average millions per incident. Theodosian addresses these pressures directly by embedding protection at the file level, helping enterprises safeguard sensitive data while reducing compliance and reputational risk.
The platform’s unique approach allows businesses to set access permissions on a per-file basis, with 20 to 30 checks per document aligned with industry compliance frameworks. It also helps companies prepare for emerging standards, including the UK’s Defence Cyber Certification (DCC) and US regulations such as Cybersecurity Maturity Model Certification (CMMC), which will affect enterprises and contractors alike. By embedding security at the data level, Theodosian ensures persistent protection and granular control, giving enterprises confidence in both their compliance and overall cybersecurity posture.
Having just launched, Theodosian will leverage the pre-seed investment to complete version 1 of the product, and to begin scaling its customer base.
Mark Pearson, Founder of Fuel Ventures, said:
"Theodosian is building the next generation of enterprise cybersecurity, protecting data at the most granular level while keeping compliance at the forefront. The team’s deep expertise in cybersecurity and risk management makes them ideally positioned to tackle this challenge, and we’re thrilled to support them at this early stage."
Andy Johnson, Co-Founder of Theodosian, commented:
"We started Theodosian to address a critical gap in enterprise security, protecting every file individually, wherever it goes. Our platform goes beyond traditional encryption, offering persistent, per-file dynamic access controls, detailed permission management, and continuous verification to ensure only the right people can access sensitive data. With Fuel Ventures’ support, we can bring these capabilities to market quickly, helping companies comply with regulations, including new DCC standards, and significantly reduce the risk of data breaches.”
Brendan Diaz, Co-Founder of Theodosian, added:
"This funding allows us to not only introduce a new approach to data security to the market, but to focus on delivering tangible value to our customers. By giving enterprises and security teams granular control over files, reducing the risk of breaches, and simplifying day-to-day security management, Theodosian lets teams focus on what matters most while ensuring sensitive data stays protected wherever it travels. Our goal is to make enterprise security effortless and reliable, so teams can collaborate with confidence and compliance is always built in.”
About Theodosian
Theodosian is a cybersecurity startup delivering file-level encryption and access control solutions for enterprises across industries. Its platform ensures data compliance with multiple regulatory frameworks, providing a persistent layer of protection that travels with each file and protects against both human error and cyberattacks.
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