Best Telecom Infrastructure Tech Companies in South Korea
The 45 best Telecom Infrastructure Tech companies in South Korea in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: DASAN Networks.
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Ranked: Best Telecom Infrastructure Tech companies in South Korea
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | DASAN Networks FTTH and equipment provider to telecom | $23M | 191 mo ago | Public | — | 1993 | CodeMirrorFroala EditorPHP+12 | 182 patents Telematics-enabled remote control and monitoring systems for construction and mobility vehicles | — |
| 2 | Lightron Fiber-optic network equipment provider | $7M | 101 mo ago | Public | Hong-Man Kim Founder & CEO | 1998 | PHPUbuntuBootstrap+7 | 16 patents Advanced LED lighting modules with heat management and bi-directional optical transceiver integration. | — |
| 3 | QSIM Plus Provider of quantum communication specialized network operation software | $2M | 31 mo ago | Series A | Kwangseok Noh CEO | 2021 | — | — | — |
| 4 | GTL Systems Manufacturer of gateway antenna systems and positioners for satellite communication | $2M | 36 mo ago | Series A | Geonho Hwang CEO | 2019 | — | — | — |
| 5 | HFR Optical and Radio networking solutions | — | 134 mo ago | Late Stage | — | 2000 | — | 105 patents Advanced wireless network infrastructure, including RF repeaters, digital twins, and solid-state detectors | 1 launch |
| 6 | Herit Provider of Unified network communication solutions | — | 266 mo ago | Deadpooled | Han Mi-Sook Founder & CEO | 2000 | — | 47 patents IoT-enabled smart energy analytics and demand‑response platforms for residential microgrids | — |
| 7 | Mercury Corporation Developer of communication equipment | — | 309 mo ago | Late Stage | Lim Chae-Byung CEO | 1983 | WordPressMySQLPHP+11 | 14 patents Wireless LAN/PoE/VoIP gateway hardware and foldable mobile device accessory solutions | — |
| 8 | ace technology Ace Technologies is a world leader in wireless communications device industry. | — | — | Public | Koo Gwan Young CEO | 1980 | Windows ServerMicrosoft ASP.NETIIS+5 | — | — |
Top 5 Telecom Infrastructure Tech companies in South Korea
#1
Series A · Seoul, Seoul · founded 2021 · 4 employees$2.3Mraised▾
Provider of quantum communication specialized network operation software. It provides solutions with a focus on quantum cryptography and quantum communication networks. It offers products like QSIMpro, a software simulator for cryptographic communication.
- Jan 2024Series A$2.3M
#2
Series A · Changwon, Gyeongsangnam-do · founded 2019 · 14 employees$2.3Mraised▾
Manufacturer of gateway antenna systems and positioners for satellite communication. These systems facilitate dual-band operations. The company's positioners eliminate signal interruption, ensuring stable satellite signal transmission and reception. They offer radome options designed to protect antennas from harsh environmental conditions.
- Aug 2023Series A$2.3M
- 2022Seed—
- May 2021Seed—
#3
Public · Daejeon, Daejeon · founded 1998 · 180 employees$7.1Mraised▾
Lightron (formerly known as Lightron Fiber-optic devices) provides fiber-optic network equipment to the telecom operators, carriers, and service providers in Korea and internationally. Its product portfolio includes passive optical network (PON), optical line terminal, transceivers, optical networking unit (ONU), sub-assemblies, pluggable optic components (SFP), and digital broadcasting (receivers, transmitters).
- Mar 2018Post IPO$2.3M
- Feb 2017Post IPO$797.4K
- Oct 2016Post IPO$4M
#4
Public · Seongnam-si, Gyeonggi-do · founded 1993 · 55 employees$23Mraised▾
FTTH and equipment provider to telecoms. Its product of FTTx for bandwidth management and delivery for video on demand, and voice communication through the dedicated optical fiber infrastructure. They also provide manufacture and supply various equipment for telephony service, Internet, and broadcasting service.
#5
Late Stage · Seongnam-si, Gyeonggi-do · founded 2000 · 198 employees—raised▾
HFR Inc provider optical and radio networking solutions for service providers and data centers. Its products include optical transport system (fronthaul and backhaul systems), cellular coverage solutions and FTTx solutions G-PON, a high capacity high-speed internet for service subscribers.
- 2015PE—
Funding & investor landscape
Market landscape — 10 sub-themes by coverage
Share of Telecom Infrastructure Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on 5G / 6G Networks is moving in South Korea
A read on the academic research around 5G / 6G Networks — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 2,431 South Korea-affiliated papers.
- Korea Advanced Institute of Science and Technology248
- Samsung196
- Korea University183
- Yonsei University170
- Electronics and Telecommunications Research Institute169
- Beamforming149→376
- MIMO78→156
- Electronic engineering29→85
- Telecommunications4→59
- Antenna (radio)16→64
- Beamforming325→421
- Wireless23→75
- Telecommunications15→51
- Optimization problem2→27
- Electronic engineering81→105
- Spectral efficiency1→5
- Telecommunications link4→6
- Electronic engineering6→7
- Computer network3→4
Where 5g 6g is researched across South Korea
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing 5g 6g patents in South Korea
South Korea 5g 6g patent filing is accelerating — 182,142 filings from 8,000 assignees (2016–2025), led by Samsung, LG Electronics, Korea Electronics Telecomm; annual filings 17360→21747.
- Samsung116886
- LG Electronics87669
- Korea Electronics Telecomm10545
- Electronics & Telecommunications6341
- KT6301
- SK Telecom6088
- Hyundai4700
- Pantech2389
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.