What ESTsecurity does

ESTsecurity (이스트시큐리티) is a Seoul-based cybersecurity company, founded in 2017 as a subsidiary of Estsoft Corp., that provides AI-enabled endpoint security, EDR/XDR, data security, patch management, and threat intelligence products anchored on its flagship ALYac antivirus brand. The company's technical core is a dual-engine detection architecture combining its proprietary ALYac engine with Bitdefender and Tera engines, fed by daily 10,000+ signature updates and telemetry from 16M+ live user endpoints — claimed to be Korea's largest domestic malware database. Product portfolio spans ALYac Public (freemium consumer), ALYac 5.1 enterprise, ALYac EDR/XDR, ALYac Server/Linux/Mac/OpenOS, ASM central console, ALYac PMS patch management, ALYac MyPC Guardian vulnerability management, SecureDisk / InternetDisk data security, Threat Inside malware intelligence (5 analysis engines), ALYac xLLM (LLM-based AI security), and the ESRC cyber threat intelligence operations that collaborate with Korean government agencies.

ESTsecurity serves two primary customer segments. The consumer segment uses a freemium model — free ALYac downloads from the official website and major Korean app stores (Google Play, Galaxy Store, One Store) with the FamilyCare subscription upsell via Google Play in-app payment — and accounts for 16M+ individual users. The enterprise and public-sector segment operates a sales-led motion with 13,000+ customers spanning government (e.g., National Information Resources Service), public institutions, educational institutions, and general enterprises (e.g., Shinsegae Chosun Hotel, Incheon Comprehensive Energy, a GS Group subsidiary), distributed through direct sales, a tiered Gold/Silver/General partner program, and a master distribution agreement with SK Infosec. Pricing is quote-based for enterprise and undisclosed.

Commercially, the company secured 15 billion KRW (~$11.5M) in pre-IPO funding in May 2022 from financial investors including HB Investment, NH Hedge Asset Management, and UAMCO, with KB Securities selected as underwriter for a planned KOSDAQ listing in 2024. A leadership change occurred in 2022 with Jong-il Jeong appointed as CEO. ESTsecurity holds continuous certifications including VB100 (since 2011), Common Criteria (since 2009), ICSA Labs EIST 5-year award, OPSWAT Gold, and Korean GS Grade 1 and ISMS certifications, and participates in KISA's CVD/VDP vulnerability disclosure pilot program.

Name

ESTsecurity

Legal name

(주) 이스트시큐리티 (ESTsecurity Corp.)

Website

https://estsecurity.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

51–100 employees

Short description

ESTsecurity (이스트시큐리티) is a Seoul-based cybersecurity company, founded in 2017 as an Estsoft subsidiary, that provides AI-augmented endpoint security under the ALYac brand to 16M+ individual consumers and 13,000+ enterprise, government, and education customers in Korea.

Ownership category

akta.pro rank

Product category

Endpoint Security Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Browser & Web Isolation Security (HDADAEAK)

akta.pro secondary industries

Threat Intelligence Services (BPAEADAC), Data Security & Privacy Services (DLP, Encryption, Privacy Ops) (BPAKAHAM)

Keywords

• Endpoint security software
• Antivirus solutions
• Endpoint detection response
• Threat intelligence services
• Data loss prevention

Headquarters

HQ city

Seocho

HQ country

South Korea

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Enterprise Software Licensing: Enterprise customers (government, public institutions, general enterprises, educational institutions) purchase ALYac licenses for endpoint security, EDR, server, Linux/Unix, Mac, patch management, and other security products. License-based recurring revenue model.
2. Individual Consumer Freemium: Free ALYac public version available for individual users. Non-members access free features through ad viewing. Paid subscription FamilyCare service offers ad-free premium features including family group management and enhanced AI-based malicious notification and app detection. Subscription billing via Google Play in-app payment.
3. Data/Intelligence Services: Threat Inside malware analysis and intelligence service sold to enterprises requiring advanced threat intelligence capabilities.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

ESTsecurity develops and sells cybersecurity software centered on the ALYac antivirus and endpoint security brand, offering products for individual consumers (free ALYac Public, Dr.Capsule/ALYacM mobile, FamilyCare subscription) and for enterprise/government/education customers (ALYac 5.1 enterprise endpoint, ALYac EDR/XDR, ALYac Server/Linux/Mac/OpenOS, ASM central management, ALYac PMS patch management, My PC Guardian, SecureDisk, InternetDisk, ALYac ZePP zero-trust, Threat Inside malware intelligence, and ALYac xLLM AI security). The portfolio is built on a dual-engine detection architecture combining a proprietary ALYac engine with the Bitdefender and Tera engines and is supported by the in-house ESRC Security Response Center that monitors global threat intelligence derived from 16 million+ live user endpoints.

Product overview

ESTsecurity (이스트시큐리티) operates a platform-plus-modules product architecture anchored by its flagship ALYac antivirus brand — Korea's leading consumer antivirus with over 16 million users and 13,000+ enterprise customers. The core ALYac product family spans personal (ALYac Public), enterprise endpoint (ALYac 5.1, ALYac Server, ALYac Linux/Unix, ALYac Mac, ALYac OpenOS), EDR (ALYac EDR/EDR Server), and management consoles (ASM). Adjacent modules cover data security (SecureDisk, InternetDisk), patch management (PMS), vulnerability management (내PC지키미), zero trust (ZePP), and AI-augmented security (xLLM, XDR). The Threat Inside service provides malware analysis and threat intelligence via 5 analysis engines. For mobile, Dr. Capsule (ALYacM) protects Android devices. FamilyCare adds AI-based family safety monitoring to the mobile product. The ESRC (Security Response Center) underpins the entire portfolio with cyber threat intelligence derived from a large sensor network and malware analyst expertise.

Differentiator

Problem solved

Functional benefit

Brands

• ALYac (알약): Flagship antivirus software product for endpoint security, available in versions for PC, Mac, Linux, servers, and Open OS.
• Dr.Capsule
• Threat Inside
• SecureDisk (시큐어디스크)
• ASM

Products and services

• ALYac Public (알약 공개용) Free antivirus program for individual consumers, providing dual-engine malware detection (ALYac engine + Bitdefender) for Windows PCs against viruses, ransomware, cryptojacking, malvertising, and pharming threats; marketed as Korea's leading consumer antivirus with over 12-16 million users.
• ALYac 5.1 Enterprise Enterprise antivirus solution for Windows endpoints featuring dual-engine malware detection, ransomware pre-blocking, real-time monitoring, and GS Certification Grade 1, sold under recurring subscription licensing to government, public, educational, and general enterprise customers.
• ALYac EDR / ALYac EDR Server Advanced endpoint detection and response solution providing visibility across all enterprise endpoints for prediction, protection, detection, analysis, and response, based on ESTsecurity's 16 million live user endpoint telemetry and 10+ years of endpoint security expertise.
• ALYac Server Server-grade antivirus solution for Windows and Linux servers providing malware protection with dual-engine scanning for enterprise server environments.
• ALYac Linux/Unix Antivirus solution for Linux and Unix server environments extending ALYac coverage to non-Windows enterprise servers.
• ALYac Mac Antivirus solution for macOS endpoints extending the ALYac product family to Apple desktop environments for enterprise customers.
• ALYac OpenOS Antivirus solution for open-source operating systems launched in 2022, expanding ALYac coverage beyond Windows endpoints.
• ASM (ALYac Security Management) Centralized security management console that enables enterprise IT teams to deploy policies, monitor, and manage all ALYac endpoint agents across an organization.
• ALYac 내PC지키미 (My PC Guardian) Vulnerability management solution that periodically checks PC security status and supports self-remediation of identified vulnerabilities for enterprise users.
• ALYac PMS (Patch Management) Patch management solution that monitors real-time Windows and third-party software patch installation status and enables simplified distribution of patch files across enterprise endpoints.
• Threat Inside Malware analysis and threat intelligence service powered by 5 multi-dimensional analysis engines, providing detailed data and in-depth analytical reports on malware samples for enterprise threat intelligence operations.
• SecureDisk (시큐어디스크) Data loss and leak prevention solution that encrypts and protects sensitive corporate documents, available as on-premise SecureDisk and cloud-based SecureDisk CLOUD variants.
• InternetDisk (인터넷디스크) Document centralization solution for secure file storage and sharing, enabling enterprises to manage and distribute documents through a centralized platform.
• ALYac xLLM AI-powered security product that applies large language model (LLM) technology to cybersecurity threat detection and response.
• ALYac XDR Extended Detection and Response platform that integrates multiple security signals across endpoints, network, and threat intelligence for unified threat detection and response.
• ALYac ZePP Zero Trust Security solution implementing zero trust architecture principles for enterprise network access control and security.
• Dr.Capsule (ALYacM) Free Android antivirus application providing antivirus and total protection for Android smartphones, marketed as Dr.Capsule / ALYacM; reached 20 million downloads and achieved No. 1 market share among Android security apps in Korea.
• FamilyCare (패밀리케어) Family safety subscription service within ALYac Mobile, allowing subscribers to create groups and monitor malicious notifications and app detection status for invited family or friend devices, billed monthly or annually via Google Play in-app payment.

Quantifiable outcome

• 16 million+ individual users protected as of 2019
• +5 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature7 records

Partnerships

Three partnerships are on record, tiered major and core.

• SK Infosec (SK인포섹)majorChannel Partner/ Reseller/ DistributorMaster distribution partnership for enterprise ALYac antivirus products. SK Infosec serves as the primary distributor for enterprise customers requiring ALYac solutions.
• Estsoft (주)이스트소프트)coreOthersParent/affiliate company. ESTsecurity was established as a subsidiary in 2017 as part of Estsoft's strategy to become a specialized security company. Estsoft develops ALTools and other software. Shared services include customer support, integrated member login, and information services.
• Korean Internet Promotion Agency / KISA (한국인터넷진흥원)majorStrategic or Co-development PartnerPartnership with KISA for quantum-resistant cryptography pilot implementation (2021), participation in CVD/VDP vulnerability disclosure pilot program, and ongoing cooperation in cybersecurity threat research and response.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• AhnLab: Korea's largest domestic cybersecurity vendor with V3 antivirus and enterprise EDR products serving government, enterprise, and consumer segments. Directly competes with ESTsecurity's ALYac across both consumer and enterprise channels in Korea.
• Igloo Security: Korean cybersecurity vendor with endpoint, network, and integrated security management products targeting enterprise and public sector. Comparable in offering breadth and Korean market focus to ESTsecurity's enterprise portfolio.
• Fasoo: Korean data security and enterprise content protection vendor with DRM/DLP capabilities overlapping with ESTsecurity's SecureDisk and data security offerings. Comparable Korean enterprise security customer base and government vertical.

Emerging players

• S2W: Korean cybersecurity startup specializing in cyber threat intelligence and dark web monitoring. Comparable to ESTsecurity's Threat Inside service and ESRC capabilities, though smaller in scale and narrower in scope.

Broad incumbents

• CrowdStrike: Global EDR/XDR leader with the Falcon platform. Represents the category-leading benchmark that ESTsecurity's ALYac EDR/XDR competes against as it seeks to expand enterprise wallet share and international presence.
• SentinelOne: Global endpoint security vendor with AI-driven EDR/XDR platform. Directly comparable technology category to ESTsecurity's endpoint detection roadmap and a benchmark for AI-security positioning.
• Trend Micro: Global endpoint and hybrid cloud security vendor with broad enterprise portfolio. Comparable in product breadth across EDR/XDR/DLP, though at significantly larger scale and global geographic footprint.
• Sophos: Global endpoint and network security vendor with Intercept X EDR and managed detection services. Comparable enterprise endpoint product category and channel-led go-to-market approach.

Others

• Bitdefender: Romanian-headquartered global endpoint security vendor whose engine is integrated into ESTsecurity's dual-engine ALYac architecture. A technology partner and adjacent competitor in the consumer/enterprise AV market.

Regional players

• Genie Networks (지니네트웍스): Korean network security and DDoS protection vendor serving telecom and enterprise customers. Adjacent Korean cybersecurity peer with overlapping public-sector and enterprise sales channels.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/alyacofficial
• Xx.com/alyac_kor
• LinkedInlinkedin.com/company/etsecurity-corp

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds2 records

Investors3 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ESTsecurity