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§ Private Profile · London, United Kingdom
Theodosian is a technology company.
Theodosian develops a data-centric security platform that provides file-level encryption and dynamic access controls. Its core offering ensures sensitive data remains protected across diverse environments, including cloud storage, endpoints, and networks, by applying FIPS 140-3 validated AES-256 encryption directly to individual files. The platform integrates real-time, context-aware access policies and zero-knowledge architecture, preventing unauthorized access and reducing breach impact through continuous monitoring and automated anomaly response.
The company was recently co-founded by Andy Johnson, alongside a team of seasoned cybersecurity professionals. Their insight stemmed from recognizing a critical gap in enterprise security, aiming to simplify compliance and ensure data protection truly travels with the files themselves, rather than relying solely on perimeter defenses. This approach focuses on empowering organizations to proactively secure their most valuable assets.
Theodosian's solutions primarily serve enterprises operating in highly regulated sectors, including government, defense, and healthcare, where stringent compliance with standards such as CMMC, ITAR, and HIPAA is mandatory. The company's vision is to redefine data security by shifting from breach notification to proactive prevention, ensuring that any attempts at unauthorized data access are blocked at the source, thus safeguarding information throughout its entire lifecycle.
Theodosian has raised $1.0M across 1 funding round.
Theodosian has raised $1.0M in total across 1 funding round.
Theodosian has raised $1.0M in total across 1 funding round.
Theodosian's investors include Fuel Ventures, Village Global, Bill Tai, 1818 Venture Capital, D11Z. Ventures, Heartfelt, Startup Wise Guys.
Theodosian has raised $1.0M across 1 funding round. Most recently, it raised $1.0M Seed in October 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Oct 1, 2025 | $1M Seed | Fuel Ventures | Village Global, Bill TAI, 1818 Venture Capital, D11z. Ventures, Heartfelt, Startup Wise Guys | Announced |
Theodosian is a UK-based cybersecurity startup founded in 2025 that builds an enterprise-grade platform for file-level encryption and access control. It provides a persistent data protection layer that travels with files across devices and cloud storage, enabling per-file permissions, 20–30 compliance-aligned checks per document, and support for standards like the UK’s Defence Cyber Certification (DCC) and US Cybersecurity Maturity Model Certification (CMMC).[1][2][4] The product serves enterprises in sectors such as defence, intelligence, banking, and healthcare, solving the problem of data breaches caused by human error or cyberattacks by embedding granular controls directly into files, beyond traditional encryption.[1][2] With $1.3 million in pre-seed funding raised in October 2025 from Fuel Ventures (lead), D11Z Ventures, 1818 Venture Capital, Heartfelt, Startup Wise Guys, and angels, Theodosian is completing v1 of its platform and gearing up for commercial scaling, showing strong early momentum.[1][2][3]
Theodosian was founded in 2025 in London by cybersecurity practitioners Andy Johnson and Brendan Diaz, who bring over a decade of combined experience from defence, intelligence, banking, and healthcare.[1][2][4] The idea emerged to address a critical gap in enterprise security: protecting individual files persistently wherever they are shared or stored, rather than relying on perimeter-based defenses.[1][2] Early traction came swiftly with the $1.3M pre-seed round in October 2025, validating their practitioner-led approach and enabling product completion and market entry.[1][3]
Theodosian rides the wave of escalating data breach risks and stricter global compliance mandates, amplified by rising cyberattacks and regulations like DCC and CMMC. Its timing aligns perfectly with enterprises shifting from perimeter security to zero-trust, data-centric models amid cloud proliferation and remote work.[1][2] Market forces favoring it include surging demand for granular tools in regulated industries (defence, finance, healthcare) and investor enthusiasm for cybersecurity, as seen in its quick pre-seed raise.[1][3] By influencing the ecosystem, Theodosian enables secure collaboration, potentially setting a new standard for "second-layer" defenses that reduce breach risks enterprise-wide.[2]
Theodosian is poised to disrupt enterprise cybersecurity with its file-centric approach, using fresh funding to launch v1 and scale commercially in 2026. Trends like AI-driven threats and evolving regulations (e.g., expanded DCC/CMMC) will propel demand, while partnerships with investors like Fuel Ventures could accelerate enterprise adoption. Its influence may grow by becoming the go-to persistent layer for compliance-heavy sectors, evolving from startup to essential infrastructure as data mobility intensifies—reinventing security at the file level where breaches begin.[1][2]