Building the privacy layer for the AI era.
4Chains (Four Chains Inc.) builds the infrastructure that lets organizations put their most sensitive data to work in the AI era, without ever exposing it.
We didn't set out to build the world's most advanced homomorphic encryption. We set out to build the world's most practical privacy infrastructure.
For decades, homomorphic encryption has focused on proving what is mathematically possible. We started with a different question:
“Can enterprises actually use it?”
That question shaped everything we built, from our cryptography to our architecture. Today, 4Chains lets organizations search, analyze, collaborate, and bring AI to their most sensitive data, without ever exposing it.
Built for enterprises. Not for benchmarks.
Traditional homomorphic encryption has focused on proving what's mathematically possible. 4Chains was built to solve real enterprise problems, with practical performance, scalability, and usability.
A world without plaintext
Sensitive data should never become plaintext. Our mission is to let organizations compute, analyze, and collaborate while data stays encrypted from start to finish.
Proven where it matters most
Trusted by central banks, healthcare institutions, capital markets, and global enterprises, where privacy and security are non-negotiable.
Wondering if this fits your environment?
Take 15 minutes with a security engineer, against your real workload.
Why now
The AI era
Enterprise data is flowing into external AI, APIs, and analytics pipelines, and being exposed along the way.
Tightening regulation
Privacy, financial-security, data-minimization, and AI-governance requirements are all intensifying at once.
The quantum horizon
Cryptographic foundations and data-protection strategy must be rethought for a post-quantum world.
Our journey
- 2026.06PoC underway: closed-network AI agent with a defense & public-sector SI firm
- 2026.05Marketplace-listing partnership signed with a global cloud vendor
- 2026.04FDS encryption integration underway with a top domestic financial group
- 2026.02Data-encryption test on a global manufacturer's ERP system
- 2025.11Commercial launch of 'Moduli Chain': blockchain-based data-integrity verification
- 2025.08Commercial release of 'TorusDB', a high-performance homomorphic-encryption database
- 2024.11Joined global accelerator programs (MITA and others)
- 2024.09Closed Pre-Series A / bridge funding
- 2024.06Selected for the MSIT SW High-Growth Club
- 2024.03Selected as a TIPA ValueUP innovative company
- 2023.11Recognized as an outstanding company in KISA's blockchain/Web3 support program
- 2023.09Participated in a CBDC proof-of-concept pilot project
- 2023.07Signed a technology partnership with LG CNS (blockchain & security)
- 2023.05Filed core EC-FHE source-technology patent
- 2023.02Selected for KDB NextONE (6th cohort)
- 2022.11Won multiple startup competitions (incl. grand prize, security category)
- 2022.08Joined the MSIT/KISA information-security core source-technology R&D program
- 2022.05Selected for the Ministry of SMEs and Startups' TIPS program
- 2021.10Filed AI data-security patent; signed technology partnership with J1729Labs
- 2021.09Four Chains Inc. founded
Partner with us.
Building the infrastructure layer for the AI era, together.