Best Cybersecurity Companies in Seoul, South Korea
The 123 best Cybersecurity companies in Seoul, South Korea in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Hexlant.
Our analysis of 174 Cybersecurity companies
$16.2b in tracked funding; 96% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Cybersecurity companies in Seoul
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ahranta MDM, file encryption, and remote control solution for mobile and PC device | — | — | — | Sangkwon Youn Founder & CEO | — | — | 12 patents Emergency response monitoring and communication systems, veterinary diagnostic tools, and encrypted data analysis. | — |
| 2 | ALYac Anti-malware and internet security solution for SOHO and individual | — | — | — | jeongsangwon CEO | — | — | — | — |
| 3 | AppSealing Runtime mobile application security solution | — | — | — | — | Tailwind CSSReactReact Router+15 | Top 50M | — | — |
| 4 | APROSHE Cloud-based unified communication management solution provider | — | — | — | Ki-Tae Jung CEO | — | — | — | — |
| 5 | Argos Provides AI-based anti-money laundering solutions | — | — | — | Wonkyu Lee CEO | — | — | 10 patents Patents concentrated in computing, sensing & instrumentation | — |
| 6 | Astron Provider of cloud infrastructure security solutions | — | — | 49 | Jo Geun-seok CEO | — | — | — | — |
| 7 | Aton Tow-factor authentication solution | — | — | — | Jongseo Kim CEO | JavaAmazon ALBAmazon Web Services+3 | Top 10M | 17 patents Cybersecurity solutions for website, messaging verification and device safety assessment | — |
| 8 | CASTO Decentralized platform for live broadcasting | — | — | — | Jinho Choi Co-Founder & CEO | — | — | — | — |
Top 12 Cybersecurity companies in Seoul
#1
Series A · Seoul, Seoul · founded 2024$7Mraised▾
AI-based intelligence solutions for AI vulnerabilities, adversarial attacks, and data privacy. It leverages data to test reactions of chosen LLM in diverse contexts. Its machines transforms heavy equipment into autonomous machines.
- Apr 2026Series A$7M
- Sep 2024Seed—
#2
Series B · Seoul, Seoul · founded 2013 · 40 employees$10.9Mraised▾
Provider of security orchestration, automation, and response platform and related services. The platform integrates threat detection, triage, digital forensics, and incident response. It offers security information and event management, log management, and cloud security posture management. The company provides solutions for automating security operation centers and detecting cyber threats.
- Dec 2025Series B$10.9M
- 2023Series A—
- 2019Seed—
#3
Seed · Seoul, Seoul · founded 2024$1.4Mraised▾
Generative AI security solutions. The platform supports enterprises use artificial intelligence, including large-scale language models.
- Oct 2025Seed$1.4M
#4
Series B · Seoul, Seoul · founded 2014 · 50 employees$25.9Mraised▾
Cloud-based enterprise collaboration platform for team messaging. It allows teams to collaborate, communicate and connect teams, share files, manage feedback and create chat rooms for different teams based on location and topics. It enables users to manage team storage for files and documents & manage settings for check boards, charts and bulletin boards.
- Nov 2022Series B$1.2M
- Sep 2020Series B$13M
- Feb 2018Series A$5.2M
- Mar 2017Series A$1.7M
#5
Series A · Seoul, Seoul · founded 2018 · 22 employees$52.8Mraised▾
Developer of blockchain wallet designed for the web3 market. The company offers data-driven insights on the blockchain market by issuing institutional-grade reports and identifying and eliminating security vulnerabilities in blockchain projects, enabling clients with blockchain wallet and custody services.
#6
Seed · Seoul, Seoul · founded 2019 · 11 employees$3.2Mraised▾
Ad blocker solutions for advertisers. It assists content publishers in recovering ad revenue lost to AdBlock. It uses anti-AdBlock technology to address this issue head-on and creates a fresh stream of revenue for media companies and content publishers. It offers tools to keep users informed of the percentage of visitors that have AdBlock enabled and the revenue loss.
- Feb 2024Seed$2M
#7
Series A · Seoul, Seoul · founded 2017 · 42 employees$16.2Mraised▾
Developer of homomorphic encryption software and tools for data privacy. They provide libraries, toolkits, and solutions for secure data analysis and processing. Their offerings facilitate data collaboration while addressing data leakage concerns. The company focuses on advancing privacy-preserving technologies for artificial intelligence and data security.
- Jul 2022Series A$16.2M
- Sep 2021Seed—
#8
Series A · Seoul, Seoul · founded 2018 · 25 employees$9Mraised▾
Blockchain-based enterprise financial infrastructure solutions and related services. It delivers tools for tokenized asset management and cross-platform settlement. It offers platforms for building blockchain solutions and optimizing artificial intelligence frameworks. The company also provides security verification tools for smart contracts and solutions for programming fund usage.
- Dec 2022Series A$4.5M
- Apr 2022Series A$4.5M
#9
Funding Raised · Seoul, Seoul · founded 1998$38Mraised▾
NITGEN focuses on developing fingerprint recognition sensor, algorithm, and biometric solutions. The sensor is specially designed for SEIR ( Surface Enhanced Irregular Reflection). Simialrly the NITGEN fingerprint algorithm has fast recognition speed, highly accurate recognition ratio, and excellent recognition capability.
- Sep 2012Conventional Debt$38M
#10
Series B · Seoul, Seoul · founded 2008 · 12 employees$10.1Mraised▾
Odd Concepts provides computer vision and deep learning based image recognition solutions for enterprises. Uses its proprietary image recognition platform to develop products and provide cloud-based API solutions for clients. Partners and clients include eBay, Samsung, Fastcat, Info Bank among others.
- Mar 2020Series B$6M
- Nov 2017Series A$3.2M
- Feb 2016Seed$860K
#11
Seed · Seoul, Seoul · founded 2015 · 15 employees$3.9Mraised▾
SSenStone is a provider of authentication solutions. The product offered by the company is StonePASS which provides authentication solutions through various authentication methods such as FIDO biometrics, security PIN, pattern, OTP, and single sign-on. It also offers StoneAUTH which generates One-Time random codes for login solutions. The company also provides a solution to prevent card fraud through VOTC. Customers include NFRI, Bithumb, and Nice.
- Jun 2022Conventional Debt$3.9M
- Jun 2016Seed—
#12
Series A · Seoul, Seoul · founded 2017$9Mraised▾
Aston is developing a decentralized document security and authentication platform using blockchain technology. The platform uses X chain blockchain technology to cross information and check it. Users can certificate their personal information via the platform using the ASTON tokens. It provides its own payment token known as the ATC token.
- Jan 2018Series A$9M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Cybersecurity coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Seoul researches in cybersecurity
Seoul National University and allied institutions lead optimistic cybersecurity research, predominantly advancing network security, intrusion detection, and anomaly detection with a cautiously confident, breakthrough-oriented stance.
- Seoul National University5
- Seoul National University of Science and Technology5
- Seoul Women\'s University4
- Namseoul University3
- University of Seoul2
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.