SK Telecom

What SK Telecom does

SK Telecom Co., Ltd. is South Korea's largest wireless carrier by market capitalization (KRW 19.5 trillion as of mid-2026), serving as a core subsidiary of SK Group conglomerate. Founded in 1984 and publicly traded on NYSE (SKM) and KRX, the company operates across consumer mobile telecommunications, enterprise AI infrastructure, and emerging sovereign AI services. Its core consumer products include 5G mobile services, T World customer platform, T Membership subscription marketplace, and T-roaming services, while the Adot AI personal assistant has reached 5 million subscribers through a multi-LLM agent architecture integrating SK Telecom's proprietary A.X K1 model with ChatGPT, Claude, Perplexity, and Gemini.

The company's technology stack spans proprietary hyperscale AI foundation models (A.X K1 with 519B parameters), gigawatt-scale AI data center infrastructure built on NVIDIA DSX architecture, GPU-as-a-Service platforms, autonomous network systems targeting Level 4 automation, and domain-specific AI agents for manufacturing and defense applications. SK Telecom has built strategic partnerships with NVIDIA (gigawatt-scale AI cloud), AWS (Ulsan data center), Lambda (GPUaaS distribution), Ericsson (AI-RAN), NTT and Chunghwa Telecom ($500M IOWN AI Fund), and Anthropic (Series H investor and Project Glasswing participant). The company holds 8 consecutive Glotel Awards for sustainable networking IPM technology and 29 consecutive years as Korea's #1 mobile carrier in customer satisfaction surveys.

SK Telecom generates revenue through subscription-based telecommunications services (mobile, broadband, T-Membership), usage-based AI data center services (KRW 131.4B in Q1 2026, up 89% YoY), AI model licensing for manufacturing and defense verticals, managed services through AI infrastructure partnerships, and asset monetization via minority equity sales in data centers (2 trillion KRW Ulsan stake sale to KKR). Q1 2026 consolidated revenue was KRW 4.39 trillion (~$3.02B USD), with operating income of KRW 537.6B. The company employs approximately 5,026 people with 1,114 developers, of which 12.7% are women—double the global average. Key risks include a 2025 data leak affecting 23 million customers, declining traditional telecom revenue growth, and US export controls on Anthropic frontier model access.

Name

SK Telecom

Legal name

SK Telecom Co., Ltd.

Website

http://www.sktelecom.com

Company type

Public

Founded year

1984

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

SK Telecom is South Korea's largest wireless carrier, now pivoting into AI infrastructure through proprietary foundation models (A.X K1, 519B parameters), gigawatt-scale NVIDIA-powered AI data centers, GPU-as-a-Service, and the Adot AI assistant serving 5 million subscribers across consumer, enterprise, and government segments.

Ownership category

akta.pro rank

Product category

Wireless Telecommunications

NAICS

Wireless Telecommunications Carriers (except Satellite) (517112), Telecommunications (517)

SIC

Radiotelephone Communications (4812)

akta.pro primary industry

Consumer Mobile Network Operators (Retail MNOs) (HDAIAAAA)

akta.pro secondary industries

On-Device/Edge Foundation Models (Mobile/Embedded LLMs) (HDAAACAN), B2B SaaS & Enterprise Personalization (CRM, Sales, Support) (HDAAAGAJ), Enterprise & B2B Mobile Network Operators (HDAIAAAB)

Keywords

• Mobile telecommunications services
• AI cloud infrastructure
• GPU-as-a-Service
• 5G wireless network
• AI foundation models

Headquarters

HQ city

Seoul

HQ country

South Korea

HQ region

Asia

Offices8 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Telecommunications Services: Traditional mobile and broadband telecommunications services including 5G subscriptions, voice, data, and roaming. Core revenue driver but experiencing slow growth (1-3% annually) as capital shifts toward AI data centers.
2. AI Data Center Operations: AI data center services generating 131.4 billion KRW in Q1 2026, up 89% year-over-year. Includes GPUaaS (GPU-as-a-Service) subscriptions, co-location services through SK Broadband, and sovereign AI cloud infrastructure partnerships with hyperscalers.
3. AI Model and Agent Services: Revenue from deploying proprietary AI foundation models (A.X K1) in manufacturing, defense, and enterprise sectors. Includes defense-specific AI model licensing through Ministry of National Defense MOU and manufacturing AI pilots with KG Steel and KONEC.
4. AI Infrastructure Partnerships: Revenue from AI infrastructure partnerships including NVIDIA DSX-based AI cloud platforms, Lambda GPUaaS co-selling, and SK-Ulsan AWS data center operations.
5. Data Center Asset Monetization: SK Telecom sells minority equity stakes (up to 49%) in data center assets, such as the planned sale of 29% stake in the Ulsan data center to KKR for approximately 2 trillion KRW, while retaining operational management.

Pricing tiers

Go-to-market motion4 records

Distribution channels7 records

Marketing channels9 records

Core offering

SK Telecom operates South Korea's largest mobile telecommunications network (5G/LTE/roaming) serving both consumer and enterprise subscribers, while building a parallel AI infrastructure business spanning gigawatt-scale AI data centers, GPU-as-a-Service, and proprietary large language models. The company sells its consumer offerings (Adot AI personal assistant, T-membership, T-roaming) directly to individuals via retail and digital channels, and sells enterprise AI solutions (A.X K1 foundation model, GPUaaS, autonomous network platforms) to corporations, manufacturers, and government agencies.

Product overview

SK Telecom operates as a telecommunications operator that has evolved into a broad AI-powered technology platform under its 'AX Innovation' (AI Transformation) strategy. The core product is Adot (에이닷), an AI personal assistant available as a mobile app and PC web service, which provides LLM-based conversational AI through a multi-LLM agent platform combining SKT's proprietary A.X K1 (519B parameter foundation model), Perplexity, ChatGPT, and Claude. Adot is supplemented by specialized AI agents for music, media, stock trading, movie booking, and daily schedule management, with a VoiceView accessibility feature for deaf users. SKT's AI portfolio includes FAME (AI fraud/security), CareVia (vision AI for disability care), Sullivan (AI visual assistance for the visually impaired), One Model (cross-domain recommendation engine), SPeCTRA (LLM testing framework), Aleph (AI security training), and the A.X K1/K2 foundation model family. Beyond AI services, SKT offers T membership (subscription marketplace with travel and lifestyle benefits), ifland (metaverse platform with K-pop fan communities), ZEM (parental control app on iOS/Android), T World (customer service portal), T-roaming/baro (international roaming), T-deal (AI commerce), and T cloud. SKT is building gigawatt-scale sovereign AI cloud infrastructure with NVIDIA (first factory 2027) and developing manufacturing-specific AI agents for steel and automotive sectors.

Differentiator

Problem solved

Functional benefit

Brands

• A.dot (에이닷): SK Telecom's AI personal assistant service, a multi-LLM AI agent platform supporting Korean-language conversational AI, voice interaction, scheduling, note-taking, and AI phone call services.
• A.X K1
• T World (T월드)
• T Membership (T멤버십)
• T Universe (T우주)
• ZEM
• Aleph
• T_direct (T다이렉트샵)

Products and services

• Adot (에이닷) AI Personal Assistant
• A.X K1 Foundation Model
• AI Cloud / GPU-as-a-Service (GPUaaS)
• Mobile Telecommunications Services (5G/LTE)
• SK Broadband Internet and IPTV
• T Membership Subscription Platform
• T Universe Subscription Marketplace
• T-roaming / baro International Roaming
• Sullivan AI Visual Assistance
• ZEM Child Safety App
• FAME AI Security Solution
• ifland Metaverse Platform
• T Cloud Storage Services
• Autonomous Network Platform
• Passkey Authentication Solution

Quantifiable outcome

• IPM technology reduces server CPU cumulative power consumption by up to 55% compared to conventional virtualization servers
• +6 more outcomes

Named customers15 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

AI capability15 records

Feature10 records

Partnerships

24 partnerships are on record, tiered core, minor and flagship.

• SK HynixcoreStrategic or Co-development Partner · 25 June 2026SK Telecom invested 738.4 billion KRW (~5.70% of equity capital of 12.96 trillion KRW) into SK Hynix's U.S. AI subsidiary SK hynix NAND Product Solutions Corp., acquiring a 0.9% stake through 1,198 newly issued shares. The entity was established by SK Hynix and Solidigm in January with SK Hynix committing $10 billion. SK Telecom, SK Inc., and SK Innovation have already invested $250M and $380M respectively. SK Telecom aims to strengthen cooperation among SK affiliates in AI data centers and related businesses.
• KG SteelcoreStrategic or Co-development Partner · 25 June 2026SK Telecom signed an MOU with KG Steel (Korea's steel manufacturer) to pilot A.X K1 AI agents in the cold-rolling line at KG Steel's Dangjin plant. Data gathered from the pilot will be used to improve AI model performance and train SK Telecom's next-generation A.X K2 model. This marks the first deployment of SK Telecom's proprietary AI model in the manufacturing sector.
• KONEC (Konek)coreStrategic or Co-development Partner · 25 June 2026SK Telecom signed an MOU with automotive parts maker KONEC (Konek) to pilot A.X K1 AI agents in die-casting and machining processes. Data gathered from the pilot will be used to improve AI model performance and train A.X K2. This marks the first manufacturing deployment of SK Telecom's proprietary AI model.
• AWS (Amazon Web Services)coreTechnology or Integration · 25 June 2026SK Telecom plans to collaborate with AWS on its autonomous network strategy announced at TM Forum DTW Ignite 2026, leveraging AWS cloud infrastructure and services as part of the global standards-based autonomous network programme targeting Level 4 network automation.
• NVIDIA (AI Factory Specialized Partner)coreTechnology or Integration · 23 June 2026Penguin Solutions became an NVIDIA AI Factory Specialized Partner within the NVIDIA Partner Network, joining a select group of solution providers recognized for expertise in designing, building, deploying, and managing full-stack NVIDIA-based AI factory infrastructure. Penguin highlighted collaboration with NVIDIA and SK Telecom on the Haein AI Factory as sovereign AI strategy expertise.
• Korea IT AcademyminorStrategic or Co-development Partner · 22 June 2026SK Telecom launched an AI security training programme called 'Aleph' with Korea IT Academy, designed to develop skills in applying AI to enterprise security and network operations. The programme is established under South Korea's Ministry of Employment and Labor K-New Deal Academy initiative and aims to equip participants with practical digital transformation skills.
• Seoul Credit Guarantee FoundationminorStrategic or Co-development Partner · 17 June 2026SK Telecom entered a data-sharing partnership with the Seoul Credit Guarantee Foundation, KB Kookmin Bank, and KB Kookmin Card, signing an MoU to establish a public-private data collaboration framework focused on analyzing commercial districts and financing demand for small businesses. The four organisations aim to develop data-driven support programmes to assist small businesses.
• KB Kookmin BankminorStrategic or Co-development Partner · 17 June 2026Four-party data partnership combining SK Telecom's communication data with KB Kookmin Bank's financial data and KB Kookmin Card's commercial district data for small business analysis and financing insights.
• KB Kookmin CardminorStrategic or Co-development Partner · 17 June 2026Four-party data partnership combining SK Telecom's communication data with KB Kookmin Card's consumption data for small business commercial district analysis and financing support.
• South Korea National Police AgencycoreStrategic or Co-development Partner · 17 June 2026SK Telecom and the National Police Agency formalized and expanded their AI-driven fraud prevention partnership following a successful 3-month pilot that used AI to analyze phishing-related malware. The pilot identified 475 criminal C2 servers and prevented losses for 643 individuals. The expanded agreement builds on the October public-private cooperation framework.
• One StoreminorChannel Partner/ Reseller/ Distributor · 17 June 2026One Store is a domestic app marketplace launched as a joint venture between SK Telecom, KT Corp., LG Uplus, and Naver in 2016. SK Telecom participates in One Store's 'all-in-one store' evolution combining app downloads, payments, and instant-play gaming. One Store has recorded 8 trillion won in cumulative transactions with a goal of 2 trillion won annual volume by 2030.
• EricssoncoreTechnology or Integration · 12 June 2026SK Telecom is a trial partner for Ericsson's AI-in-RAN solution, embedding telco-grade AI models into Radio Access Network platforms to boost 5G performance without new hardware. The solution delivers up to 20% higher downlink throughput, 10% better spectral efficiency, and 5x greater user-positioning precision. Fifteen operators have trialled or deployed the solution.
• NTT (Nippon Telegraph and Telephone)flagshipStrategic or Co-development Partner · 10 June 2026SK Telecom, Japan's NTT, and Taiwan's Chunghwa Telecom launched the 'IOWN AI Fund' worth $500 million through Catalight Capital. The fund targets startups in AI data center infrastructure, semiconductors, cloud infrastructure, and AI services across North America, Asia, and Europe. SK Hynix is preparing to participate. The three companies will help portfolio firms test technologies, improve services, and find customers.
• Chunghwa TelecomflagshipStrategic or Co-development Partner · 10 June 2026SK Telecom, Japan's NTT, and Taiwan's Chunghwa Telecom launched the 'IOWN AI Fund' worth $500 million through Catalight Capital. The fund targets startups in AI data center infrastructure, semiconductors, cloud infrastructure, and AI services across North America, Asia, and Europe.
• SK HynixcoreStrategic or Co-development Partner · 8 June 2026SK Group and SK Hynix signed multi-year technology partnerships with NVIDIA for advanced memory chips, AI factories, and gigawatt-level AI data centers. SK Hynix serves as NVIDIA's largest memory partner with procurement expected to rise above current multi-billion dollar levels. Goldman Sachs projects SK Hynix will maintain over 50% of the total HBM market through at least 2026 against a projected $58 billion global market in 2026.
• NVIDIAcoreTechnology or Integration · 7 June 2026SK Telecom and NVIDIA announced partnership to build a gigawatt-scale AI Cloud in South Korea using NVIDIA DSX full-stack reference architecture, with the first AI factory expected online in 2027. The platform will power sovereign, physical, and enterprise AI services. Both companies announced joint research on next-generation AI factory architecture covering accelerated computing, memory technologies, and data center operations. SK Telecom also joined NVIDIA's Cloud Partner Network and Physical AI program.
• NVIDIA (Physical AI Program)coreStrategic or Co-development Partner · 2 June 2026SK Telecom was named among a dozen industrial partners for NVIDIA's Physical AI program unveiled at GTC Taipei. SK Telecom completed a digital twin proof of concept for SK Hynix's chip fabrication plant, demonstrating agentic modeling capabilities for large-scale manufacturing environments. The collaboration drove SK Telecom's stock up 19% on the NYSE and 12% on the Seoul exchange.
• Penguin SolutionsminorChannel Partner/ Reseller/ Distributor · 2 June 2026SK Telecom collaborates with Penguin Solutions on the Haein AI Factory, one of Korea's largest GPU-as-a-Service clusters. Penguin became NVIDIA's AI Factory Specialized Partner and cited the Haein AI Factory as an example of sovereign AI strategy expertise. SK Telecom's collaboration with Penguin leverages NVIDIA technology for Korean enterprise AI workloads.
• NVIDIAcoreTechnology or Integration · 1 June 2026SK Telecom implemented a digital twin of SK Hynix's semiconductor factory using NVIDIA's Omniverse 3D virtual design platform for Physical AI. As part of SK Hynix's 'Autonomous Factory 2030' initiative, SK Telecom developed Agentic Digital Twin Modeling technology that automates conversion of manufacturing data into digital twin environments. SK Telecom plans to expand this technology beyond semiconductors to public and corporate sectors.
• Korea Internet & Security Agency (KISA)minorStrategic or Co-development Partner · 1 June 2026KISA joined Anthropic's Project Glasswing alongside SK Telecom and Samsung Electronics for access to Claude Mythos cybersecurity AI model. KISA participated in the Mythos model access as part of Korea's national cybersecurity initiative under the Ministry of Science and ICT.
• South Korea Ministry of National DefenseflagshipStrategic or Co-development Partner · 14 May 2026SK Telecom signed an MOU with South Korea's Ministry of National Defense to develop defense-optimized AI models using MSIT's Sovereign AI Foundation Model. SK Telecom will adapt its A.X K1 hyperscale model (519B parameters) for defense use through model compression and defense-specific training, while MND provides GPU resources secured through MSIT's National AI Project. This marks the first application of Korea's national AI foundation model in the defense sector.
• AWS (Amazon Web Services)coreTechnology or Integration · 1 May 2026SK Telecom partnered with AWS for the Ulsan AI data center, developed on a former SK Group chemicals subsidiary site. The facility expanded capacity from an initial 103MW target to 1GW. SK Telecom plans to sell up to 49% equity (KKR 29%, IMM Investment and Stonebridge consortium remainder) for approximately 2 trillion won while retaining operational management.
• EricssoncoreTechnology or Integration · 24 April 2026SK Telecom and Ericsson signed an MoU to advance network innovation toward 6G, effective until March 2031. The partnership focuses on AI-powered Radio Access Networks, 5G monetization, open and autonomous networks, zero trust security, and 6G standardization. The collaboration establishes a framework for long-term 6G research and technological leadership in AI-powered network evolution.
• LambdacoreChannel Partner/ Reseller/ Distributor · 1 December 2025SK Telecom partnered with Lambda for AI cloud co-selling, deploying NVIDIA H100 GPUs at SK Broadband's Gasan data center in Seoul from December. The partnership includes Lambda's first Asia-Pacific Korean region establishment. SK Telecom plans GPU expansion to thousands of units within 3 years with H200 early adoption. Target rack power density of 44kW (9x domestic average) at the Seoul facility.

Scale indicators29 records

Recent moves8 records

Expansion highlights7 records

Market position

Competitive moat6 records

Key highlights7 records

Customer concentration

• Xx.com/SKtelecom
• YouTubeyoutube.com/@SKtelecom
• Facebookfacebook.com/sktworld
• LinkedInlinkedin.com/company/sk-telecom
• Instagraminstagram.com/sktelecom

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries5 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A10 records

Investments20 records

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

Frequently asked questions about SK Telecom