What TAPKO Technologies does

TAPKO Technologies is a German specialist in KNX building automation, founded in 1999 and headquartered in Regensburg, Germany. The company operates along three interlocking lines: software (the proprietary KAIstack KNX communication stack licensed to OEMs), hardware (OEM KNX devices including couplers, routers, power supplies, USB interfaces, sensors, and switches, manufactured at a facility in Split, Croatia), and testing services (an ISO 17025-accredited KNX TestLab serving as a recognized conformance test facility within the KNX association). Approximately 80% of TAPKO's Croatia output is OEM, with a manufacturing capacity reported at roughly 20 million components per year as of 2019.

The company's customer base spans semiconductor suppliers (Texas Instruments, ON Semiconductor), automotive and industrial OEMs (ZF Friedrichshafen / Voltus, ELAN), and KNX distributors worldwide, with at least one Swiss customer relationship lasting 15+ years. KAIstack licensing and KNX TestLab certification fees provide software- and service-style revenue alongside the hardware business, though exact revenue mix is not disclosed. As of February 2026, TAPKO became a majority-owned subsidiary of MDT Group, anchoring it within a larger KNX-ecosystems platform. The company employs between 11 and 50 staff.

Commercially, TAPKO monetizes through per-device OEM shipments, per-license or royalty terms on the KAIstack stack (consumed by manufacturers integrating KNX into their own products), and fee-for-service conformance testing at the TestLab. Three new products — the Touch 55 panel, a presence detector, and the MECps640 power supply — were showcased at Light + Building 2026, indicating continued product-surface expansion within the KNX standard rather than a pivot to adjacent protocols or AI-driven smart-building stacks.

Name

TAPKO Technologies

Legal name

TAPKO Technologies GmbH

Website

https://tapko.de

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

TAPKO Technologies is a German KNX building automation specialist founded in 1999, providing OEMs with the KAIstack protocol software, certified KNX hardware devices, and ISO 17025-accredited conformance testing. It primarily serves semiconductor, automotive, industrial, and KNX distribution customers.

Ownership category

akta.pro rank

Product category

Building Automation Hardware

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Relay and Industrial Control Manufacturing (335314), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Laboratory Analytical Instruments (3826), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Foundry Platform & Design Enablement Services (PDK/DFM/Process Qualification) (HDAHACAJ)

akta.pro secondary industries

Assembly & Packaging Services (Wirebond/Flip-Chip/FCBGA) (HDAHADAA), Testing, Inspection, Certification & Commissioning (TICx) Technical Services (BPAHAIAL), System-in-Package (SiP) & Module Assembly (RF modules, power modules) (HDAHADAI)

Keywords

• KNX building automation
• KNX protocol stack
• OEM hardware devices
• KNX certification testing
• Smart building technology

Headquarters

HQ city

Regensburg

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. KNX Hardware Device Sales (OEM): Sale of KNX system devices (couplers, routers, power supplies, USB interfaces, sensors, switches) under TAPKO's own brand and as OEM products. OEM customers rebrand and resell under their own labels. Revenue is one-time per device with recurring orders from established customer relationships. The company operates its own European manufacturing facility.
2. KAIstack Software Licensing: Licensing of KAIstack KNX communication stack software to device manufacturers for integration into their KNX products. Offered with full licenses, demo versions, and evaluation boards. Delivered with certified stack, drivers, and hardware documentation. Revenue model combines one-time license fees with potential support and maintenance agreements.
3. KNX Development Services: Full-cycle engineering services including specification development, hardware and software development, prototyping, ETS database entry creation, testing, certification support, and series production preparation. TAPKO supports manufacturers through all stages from concept to certified, market-ready KNX device.
4. KNX Certification Testing (TestLab): Accredited KNX testing laboratory services for third-party manufacturers seeking KNX certification. Independent, manufacturer-neutral testing for interoperability and KNX specification compliance. EN 17025 compliant.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels9 records

Core offering

TAPKO Technologies develops and licenses the KAIstack KNX communication software and manufactures KNX system devices (couplers, routers, USB interfaces, power supplies, sensors, and switches) sold as OEM products to building automation device manufacturers worldwide. The company also operates an ISO 17025 accredited KNX TestLab providing third-party certification testing, and offers full-cycle KNX development services from specification through certified, market-ready device production.

Product overview

TAPKO Technologies is a German KNX specialist offering a comprehensive portfolio of KNX system devices, software, and OEM solutions for building automation. The core product line includes KNX (OEM) devices such as couplers and routers (MECtp-Sec Line/Area Coupler, MECip-Sec IP Router, MECrf RF Media Coupler), USB interfaces (UIMtp, UIMip-Sec, UIMrf), power supplies (MECps640, KPS640, IPS640), and IP gateways (SIMip). The KAIstack family—encompassing KAIstack, KAIstack-secure, low power KAIstack, and KAIstack for ST—provides the mature KNX communication software foundation at the core of the portfolio. Connectivity is extended through KAIlink modules (KAIlink-IP, KAIlink-Bit, KAIlink-UART, KAIlink-RF). Sensor/switch products include Touch Display, Presence Detector, and TIO4-Sec. Tools and modules include KAIstack EVAL-Boards, RF Field Strength Analyzer, KIMaip, SIM-KNX, and SIM-KNX-Devices. Supporting services include an EN 17025 accredited KNX TestLab for third-party certification and in-house European production/manufacturing. TAPKO's KNX Secure solutions have been in the portfolio since 2018.

Differentiator

Problem solved

Functional benefit

Brands

• KAIstack: KNX communication stack software developed by TAPKO for device manufacturers and OEM projects
• KAI
• MEC Series
• UIM Series
• SIM Series
• TAPKO Touch 55
• TAPKO m~ series

Products and services

• KAIstack KNX Communication Stack Mature, modular KNX communication stack software foundation for KNX device development. Combines decades of KNX experience with high technical reliability and flexible integration capabilities, serving as a proven basis for market-ready KNX devices. Available in standard, secure (KAIstack-secure), low-power, and ST-platform variants.
• MECtp-Sec KNX Line/Area Coupler KNX Line/Area Coupler with Secure Commissioning support that connects a main TP line with a sub-line and enables KNX communication between both KNX TP lines, with configurable filtering of group and individually addressed telegrams.
• MECip-Sec KNX IP Router KNX IP Router secure with both routing and tunneling interfaces. Connects a KNX TP line to the IP Backbone and supports KNX IP Secure, KNX Data Secure, and Secure Commissioning for encrypted configuration and runtime communication.
• MECrf KNX RF Media Coupler KNX RF media coupler for S-mode enabling KNX communication between KNX RF and KNX TP media, functioning as both a KNX RF Coupler and RF Programming Interface. Supports filtering of group and physically addressed telegrams.
• MECps640 Combined Power Supply and Line Coupler Combined KNX device integrating a Line/Area Coupler and 640mA Bus Power Supply in a single 2TE DIN rail housing. Reduces installation footprint by at least 50% compared to using two separate devices and offers improved efficiency over the IPS640 smart KNX power supply. Available as OEM product.
• UIMtp KNX USB Interface KNX USB Interface for PC-to-KNX bus connectivity supporting ETS and visualization/logging/diagnostics applications via the flexible common EMI protocol. USB 2.0 with Type B connector, 220-byte APDU length, firmware update via USB, and KNX certified.
• SIMip IP Gateway IP Gateway enabling IP-capable devices (up to 4) to connect to and be controlled via the KNX TP bus. Supports RAW mode, interoperability mode, and transparent mode, with up to 1024 objects.
• KAIlink Connectivity Module Family Family of KNX interface modules (KAIlink-IP, KAIlink-Bit, KAIlink-UART, KAIlink-RF) providing flexible KNX connectivity solutions for different interfaces and protocols, enabling rapid prototyping and development of KNX-enabled devices.
• KNX Presence Detector Ultra-flat KNX presence detector designed for ceiling installation, providing occupancy detection for energy-efficient building automation control.
• TAPKO Touch Display KNX touch display panel providing visual control interface for building automation systems, available in 55mm standard format. Part of TAPKO's sensor and switch product line for end-user interaction.
• KAIstack EVAL-Boards Evaluation and development boards for KAIstack KNX software, providing hardware platforms for testing and prototyping KNX device implementations.
• RF Field Strength Analyzer Mobile app and tool for analyzing KNX RF installation field strength, helping diagnose and troubleshoot KNX RF wireless deployments.
• KNX TestLab Certification Services EN ISO 17025 accredited KNX testing laboratory offering interoperability and KNX conformance testing for third-party manufacturers' KNX products and communication stacks. One of the few labs worldwide providing Lower Layer Tests.
• KNX Development Services Full-cycle engineering services including specification development, hardware and software development, prototyping, ETS database entry creation, testing, certification support, and series production preparation. TAPKO supports manufacturers from concept to certified, market-ready KNX device.
• KNX OEM Production / Manufacturing In-house manufacturing, testing, packaging, and worldwide distribution of KNX OEM devices. TAPKO produces approximately 20 million components annually, with 80% being own-brand OEM products sold to manufacturers under their own labels.

Quantifiable outcome

• MECps640 reduces installation footprint by at least 50% compared to separate power supply + line coupler solutions
• +3 more outcomes

Named customers5 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

Integration1 record

Feature6 records

Partnerships

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

• MDT GroupcoreStrategic or Co-development Partner · 1 February 2026In February 2026, MDT Group acquired a majority stake in TAPKO Technologies GmbH (German KNX pioneer) and Croatian KNX manufacturer Apricum d.o.o., consolidating the competitive landscape in the KNX market. This acquisition signals continued strategic investment in KNX technology by MDT Group and positions TAPKO within a larger industrial group.
• Texas InstrumentsflagshipTechnology or IntegrationTexas Instruments integrates TAPKO hardware (KAI*stack* Interface Module) and KAIstack software into their TIDM-KNXTHERMOSTAT KNX Thermostat Reference Design Board. TAPKO's products are featured in TI's official design guide and KNX development introduction documentation. TI's MSP430 microcontroller connects to the KNX TP bus via TAPKO's interface module.
• ON SemiconductorflagshipTechnology or IntegrationON Semiconductor partnered with TAPKO to provide KAIstack adapted for their three KNX Arduino shields (NCN5130ASGEVB, NCN5121ASGEVB, NCN5110ASGEVB) used with ST Nucleo-64 boards. TAPKO provides free demo versions of KAIstack for device model 07B0 (System B) with ST chip drivers and full hardware documentation for evaluation and testing.
• ELAN (Home Automation)coreTechnology or IntegrationELAN developed a KNX integration module for their home automation platform using TAPKO's SIM-IP gateway (SIMip). The SIMip enables IP-based devices (up to four) with TCP/IP connectivity to be controlled via the KNX TP bus system, expanding ELAN's ecosystem integration capabilities.
• ZF Friedrichshafen and VoltusminorStrategic or Co-development PartnerTAPKO collaborated with ZF Friedrichshafen and Voltus to create a KNX RF training and starter kit (RF-S) for European KNX training centers. The kit (basic kit Art. No. 1692969; extension kit Art. No. 1692970) includes KNX RF media coupler, batteryless KNX RF push button, programming adapter, USB stick, and RF socket. Supports the mandated inclusion of KNX RF in KNX Basic Course from Spring 2020.
• Apricum d.o.o.coreStrategic or Co-development PartnerApricum d.o.o. (Croatian KNX manufacturer) was acquired alongside TAPKO by MDT Group in February 2026. Both companies share a Croatian connection — TAPKO has manufacturing operations in Split, Croatia, and the two companies co-exhibited at Light + Building 2026.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Weinzierl Engineering: Weinzierl is a direct competitor to TAPKO in KNX communication stacks and OEM KNX devices (couplers, IP interfaces, routers). Both companies license KNX stacks to device manufacturers and supply KNX test instruments, serving the same OEM/developer audience.
• Elsner Elektronik: Elsner manufactures KNX sensors, weather stations, and I/O modules for building automation. Like TAPKO, it supplies KNX-certified devices and embedded building-automation products, competing in OEM/white-label channels.
• MDT Technologies: MDT is a KNX device manufacturer (actuators, dimmers, sensors) that acquired a majority stake in TAPKO in February 2026. Now a strategic parent/peer, MDT competes in the same KNX device category while previously relying on TAPKO's stack in some product lines.
• Zennio Advanced Technologies: Zennio designs and manufactures KNX touch panels, sensors, and actuators for smart-building automation. It is a comparable KNX OEM competitor serving similar building-automation system integrators.
• IPAS Industrieelektronik: IPAS produces KNX actuators, dimmers, and system devices for building automation, with a portfolio comparable to TAPKO's MEC-series couplers and power supplies. It is a direct competitor in KNX system devices.

Broad incumbents

• Gira Giersiepen: Gira is an established German building-automation incumbent offering KNX switches, sensors, and system devices. It is broader than TAPKO (full home/building electricals portfolio) and a key reference for OEMs in the same KNX ecosystem.
• Jung (Albrecht Jung): Jung is a German KNX device and electrical-installation incumbent with a comparable KNX coupler, actuator, and sensor portfolio. Operates at a much larger scale than TAPKO and competes for the same KNX installer channel.
• Siemens Smart Infrastructure: Siemens is a global broad-line building-automation incumbent offering KNX-compatible controls alongside BACnet and proprietary systems. It competes with TAPKO indirectly via its portfolio of KNX-compatible system devices and installer relationships.
• Schneider Electric: Schneider Electric offers a broad building-automation and energy-management portfolio with KNX integration. It is a much larger incumbent addressing the same end-customer base (commercial and residential buildings) as TAPKO's OEM customers.
• ABB Busch-Jaeger: ABB/Busch-Jaeger is a major German/European KNX device and building-automation incumbent with couplers, actuators, sensors, and panels. It is much larger than TAPKO and competes for the same KNX ecosystem presence at the installer/specifier level.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/TAPKO-Technologies-GmbH-1982172248724018
• LinkedInlinkedin.com/company/tapko-technologies-gmbh

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

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 TAPKO Technologies