What LESSENGERS does

LESSENGERS Inc. is a South Korean private company founded in August 2017 by Chongcook Kim, PhD, that designs and manufactures optical interconnect components based on its proprietary Direct Optical Wiring (DOW) technology — a polymer-based air-cladded waveguide process that fabricates nanoscale optical wires (as thin as 0.2 μm) without lens optics, enabling fully passive alignment and a hermetically sealed optical interface. The company's product portfolio spans four lines: (1) on-board and near-packaged/co-packaged optical engines for AI accelerator and switch boards, (2) optical transceivers in OSFP, QSFP-DD, and QSFP112 form factors from 100G up to an industry-first 1.6T OSFP 2xSR4 (with linear-drive power as low as 4W), (3) Active Optical Cables including 800G/400G AOCs, and (4) ultra-slim HDMI2.0 and DisplayPort consumer AOCs. The technology is supported by 37 patents granted/pending worldwide covering both structure and process.

The company's commercial focus is on AI/ML clusters, hyperscale data centers, and HPC/supercomputing infrastructure, with silicon photonics and consumer AV as secondary segments. LESSENGERS sells via direct enterprise sales (no distributor or channel partner coverage disclosed), targeting hyperscaler and Tier-1 OEM buyers through industry events (OFC, ECOC, SC, ISC), OIF interoperability demonstrations, and joint reference designs with strategic partners including POET Technologies (800G DR8 in H2 2025, 1.6T 2xDR4 in Q2 2026) and Alphawave Semi (immersion-cooled 800G NPO at SC25). Operations are concentrated in South Korea: R&D and headquarters in Pohang, sales and marketing in Seoul, with R&D and production in Gwangju; revenue, customer identities, and ownership structure beyond the founder and a 2021 strategic investment from Mycronic AB are not publicly disclosed.

Name

LESSENGERS

Legal name

LESSENGERS Inc.

Website

https://lessengers.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

11–50 employees

Short description

LESSENGERS is a South Korean optical interconnect vendor using its proprietary Direct Optical Wiring (DOW) polymer-waveguide technology to build optical engines and 100G–1.6T transceivers for AI clusters, hyperscale data centers, and HPC buyers.

Ownership category

akta.pro rank

Product category

Optical Networking Hardware

NAICS

Other Communications Equipment Manufacturing (33429), Electronic Connector Manufacturing (334417), Fiber Optic Cable Manufacturing (335921)

SIC

Computer Communications Equipment (3576), Electronic Components, Nec (3679)

akta.pro primary industry

Optical Transceivers (SFP/SFP+/SFP28/QSFP/QSFP-DD/OSFP) (HDAFAEAE)

akta.pro secondary industries

Active Optical Cables (AOC) & Optical Interconnects (HDAFAEAG), Fiber-Optic Interconnects (Connectors/Cables/Transceivers Interfaces) (HDAHAOAE)

Keywords

• Optical transceivers
• Optical interconnects
• Active optical cables
• Data center networking
• Polymer waveguide technology

Headquarters

HQ city

Pohang

HQ country

South Korea

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Optical Transceivers: Sale of high-speed optical transceivers (100G/200G/400G/800G/1.6T) for AI/ML, data center, and HPC applications. Products include OSFP, QSFP-DD, and QSFP112 form factors.
2. Active Optical Cables (AOCs): Sale of active optical cables for high-speed data transmission in data centers, including HDMI AOCs and custom configurations.
3. Optical Engines (NPO/CPO): Sale of near-packaged optics (NPO) and co-packaged optics (CPO) optical engines for integration into larger systems.
4. Consumer Active Optical Cables: Sale of ultra-slim HDMI and DisplayPort AOCs, including the world's thinnest optical HDMI AOC with 6.8mm metal housing supporting 4K at 60Hz up to 150 meters.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

LESSENGERS designs, manufactures, and sells optical interconnect hardware built on its proprietary Direct Optical Wiring (DOW) polymer-based air-cladded waveguide platform. Its product portfolio includes high-speed optical transceivers (100G–1.6T in OSFP, QSFP-DD, QSFP112, QSFP56 form factors), NPO/CPO optical engines for AI infrastructure, and consumer HDMI active optical cables. Products are sold primarily to hyperscale data center operators, AI/ML cluster builders, and HPC/supercomputing customers.

Product overview

LESSENGERS is an innovative optical-interconnect solutions provider using its proprietary Direct Optical Wiring (DOW) technology as a core platform. The product portfolio spans optical engines (NPO/CPO for AI infrastructure and on-board type), optical transceivers (100G through 1.6T in OSFP, QSFP-DD, and QSFP112 form factors with Retimed, Linear Drive, and Linear Receive variants), and Consumer Active Optical Cables (HDMI2.0 AOC). The platform architecture enables high-density, low-power optical connections for data centers, AI/ML clusters, high-performance computing, and consumer electronics, with DOW technology providing the foundational capability for passive alignment and immersion cooling compatibility across the entire product range.

Differentiator

Problem solved

Functional benefit

Products and services

• 1.6T OSFP 2×SR4 Optical Transceiver/AOC Highest bandwidth optical transceiver in LESSENGERS' portfolio, OSFP MSA compliant and hot-pluggable, eight-channel full-duplex with data rate up to 1.6 Tb/s. Available in Retimed, Linear Receive (LRO), and Linear Drive (LPO) variants. Targets hyperscale data center AI/ML workloads.
• 800G OSFP 2×SR4 Optical Transceiver/AOC OSFP form factor 800G transceiver with data rate up to 850 Gb/s, Retimed 8×106.25 Gb/s PAM4 electrical interface, transmission distance up to 100m, dual MPO12/APC, typical power consumption of 13W. Available in Retimed, Linear Receive, and Linear Drive variants.
• 800G QSFP-DD SR8 Optical Transceiver/AOC QSFP-DD MSA compliant, hot-pluggable 800G transceiver with Retimed 8×106.25 Gb/s PAM4 electrical interface and MPO16/APC receptacle. Available in Retimed and Linear Drive variants for AI/ML and HPC cluster deployments.
• 400G OSFP SR4 Optical Transceiver/AOC Four-channel full-duplex 400G OSFP transceiver with data rate up to 425 Gb/s, Retimed 4×106.25 Gb/s PAM4 electrical interface, MPO12/APC receptacle, typical power consumption of 6.5W. Available in Retimed, Linear Receive (4.2W), and Linear Drive (2W) variants.
• 400G QSFP112 SR4 Optical Transceiver/AOC QSFP112 MSA compliant, hot-pluggable four-channel 400G transceiver for high-density applications. Available in Retimed, Linear Receive, and Linear Drive variants for power-sensitive deployments.
• 400G QSFP-DD SR8 Optical Transceiver QSFP-DD form factor 400G transceiver with Retimed 8×53.125 Gb/s PAM4 electrical interface, typical power consumption of 8W, for high-density data center deployments.
• 200G QSFP56 SR4 Optical Transceiver and AOC QSFP56 MSA compliant, hot-pluggable 200G transceiver and active optical cable with data rate up to 212.5 Gb/s, Retimed 4×53.125 Gb/s PAM4 electrical interface, for high-density data center deployments.
• 800G NPO (Near-Packaged Optics) Optical Engine Detachable, socket-type 800G NPO optical engine for on-board optics with repairability and serviceability benefits. Features 8×112G PAM4 electrical interfaces, ultra-low energy consumption (<7 pJ/bit), pluggable optical interface with standard 2×MT12 fiber, and immersion cooling readiness.
• 200G On-Board Type Optical Engine Low power-consumption four-channel full-duplex optical engine with very small form-factor, aggregate data rate of 212.5 Gbit/s, single 3.3 V power supply, maximum power dissipation of 3.5 W, ball grid array type bonding. Designed for on-board integration into switches, routers, and accelerator boards.
• HDMI2.0 Active Optical Cable Consumer-grade active optical cable with the world's slimmest metal housing of 6.8mm, supporting HDMI2.0, 4K at 60 Hz UHD display, HDCP2.2, with reach up to 150 meters and HDMI type A connector. ROHS compliant. Designed for home theater, digital signage, and pro AV installations.
• 100G QSFP28 SR4 Optical Transceiver Entry-level data center optical transceiver with 100G data rate in QSFP28 form factor for legacy and cost-sensitive data center deployments, manufactured using LESSENGERS' DOW polymer waveguide platform.

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered core.

• POET TechnologiescoreStrategic or Co-development Partner · 17 March 2026Joint development partnership to create 1.6T 2×DR4 optical transceiver module for next-generation AI clusters and hyperscale data centers, combining POET's Optical Interposer platform with Lessengers' DOW technology. Samples targeted for Q2 2026. Market forecast projects over 125 million units for 1.6T DR8 modules over 2027-2031 period.
• Alphawave SemicoreStrategic or Co-development Partner · 18 November 2025Industry-first demonstration of immersion-cooled 800G NPO module integrated with Alphawave Semi's AlphaCHIP1600-IO chiplet at SC25 conference. Both optics and chiplet submerged in cooling liquid, demonstrating DOW technology's immersion cooling compatibility.
• POET TechnologiescoreStrategic or Co-development Partner · 2 April 2025Partnership to develop 800G DR8 transceiver including POET's transmit and receive optical engines with Lessengers' DOW technology for cost-effective AI and hyperscale data center applications. Transceiver samples expected in H2 2025.
• Alphawave SemicoreTechnology or Integration · 15 November 2024Partnership at SC24 Supercomputing Conference to showcase advances in AI connectivity. Lessengers partnered with Alphawave Semi alongside PCI-SIG, CXL Consortium, UCIe Consortium, and Samtec. Also featured Lessengers' 800G NPO optical engine at AI Infra Summit 2025.
• OIF (Optical Internetworking Forum)coreTechnology or IntegrationActive member company participating in OIF interoperability demonstrations at OFC, ECOC, and other industry events. OIF has 170+ member companies including network operators, system vendors, component vendors, and test equipment vendors collaborating on interoperable optical and electrical solutions.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Eoptolink Technology: Eoptolink manufactures high-speed optical transceivers (200G-1.6T) in QSFP-DD, OSFP, and QSFP112 form factors for data center and telecom customers. Highly comparable product portfolio to Lessengers, targeting the same hyperscale and AI cluster customers.
• Accelink Technologies: Accelink manufactures optical transceivers, modules, and components for telecom and datacom applications, including high-speed products for data centers. Direct competitor in the optical transceiver market serving similar customer bases.
• Hisense Broadband: Hisense Broadband produces optical transceiver modules and AOCs for data centers, 5G, and consumer applications including HDMI AOCs. Direct overlap with Lessengers' optical transceiver and consumer AOC product lines.
• Innolight Technology: Innolight is the leading merchant supplier of 800G/1.6T optical transceivers for hyperscale AI data centers, shipping OSFP and QSFP-DD products at scale. Both companies target the same hyperscale buyer with comparable form-factor portfolios, making them direct competitors for design wins.
• POET Technologies: POET develops the Optical Interposer platform for NPO/CPO applications and is Lessengers' strategic co-development partner on 800G DR8 and 1.6T 2×DR4 products. While a partner, POET also sells into the same AI/hyperscale optical interconnect market, making it both ally and adjacent competitor.
• Source Photonics: Source Photonics designs and manufactures optical transceivers for data center, wireless, and broadband applications, including 100G-800G products in QSFP-DD and OSFP form factors. Direct competitor across the same speed grades and form factors as Lessengers.

Broad incumbents

• Lumentum Holdings: Lumentum designs and manufactures photonics products including lasers, optical components, and high-speed transceivers for datacom and telecom. Overlapping capabilities in datacom optical interconnects at scale with broader portfolio than Lessengers.
• Intel (Silicon Photonics): Intel's Silicon Photonics division develops integrated optical transceivers and on-board optics for data centers, including CPO programs. A broad incumbent with deep R&D resources pursuing the same NPO/CPO opportunity Lessengers addresses.
• Coherent Corp: Coherent (formerly II-VI/Finisar) is the largest pure-play optical components and transceiver company, serving datacom, telecom, and 3D sensing. Broad incumbent competing with Lessengers in 800G/1.6T transceivers with substantially greater scale and capital.
• Broadcom: Broadcom supplies optical interconnect components, switch ASICs (Tomahawk/Jericho), and PAM4 DSPs used in hyperscale networks. As a vertically integrated incumbent, Broadcom competes and partners across the optical interconnect stack where Lessengers operates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/lessengers

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds1 record

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 LESSENGERS