What Kassl does

Kassl GmbH is a privately held German software development company founded in 1998 and headquartered in Geestland near Bremerhaven. It specializes exclusively in OPC (Open Platform Communications) client and server software tools, with a 25+ year track record and OPC Foundation membership spanning more than 10 years. The company's flagship offering is the dOPC Client Toolkit, a software development kit available for Embarcadero Delphi and C++ Builder environments that supports the full OPC specification suite — OPC UA (Unified Architecture), OPC Classic DA (Data Access), OPC XML DA, OPC AE (Alarms & Events) and OPC HDA (Historical Data Access). The toolkit is written entirely in 100% Object Pascal and is delivered as VCL/FireMonkey components that bind OPC item values directly to visual component properties, enabling cross-platform OPC UA and XML DA client applications for Windows, Android, iOS and Mac from a single code base.

Beyond the core developer toolkit, Kassl sells a complementary suite of OPC utilities: dOPC XGate (an OPC XML DA server gateway that adds a web-services interface to any COM DA OPC server without requiring .NET), dOPC XCOM (a COM/DCOM bridge giving legacy OPC DA clients access to OPC XML DA servers), dOPC Clone (an OPC DA server emulator for testing and demonstration), dOPC Explorer (a diagnostic test client), and dOPC Mobile Explorer (a cross-platform mobile OPC UA test client). The full source code is bundled with each developer license, and the runtime distribution license is royalty-free.

Kassl operates a product-led, direct-to-developer go-to-market motion. Software is sold via one-time perpetual licenses priced from €19 (dOPC Explorer) up to €790 (dOPC Client Toolkit for Delphi), with a 60-day money-back guarantee and fully functional free trial downloads available for every product. Sales are processed directly through the company website and through the Digistore24 online reseller, with enterprise buyers able to place orders via email for invoice-based procurement. Named reference customers include ABB, Robert Bosch, Siemens, Bosch Rexroth, GE, KUKA, Daimler, Honda, Chevron, Enercon, Vattenfall, Grupo ICE, Fresenius, Liebherr, thyssenkrupp, United States Steel, and Wacker Chemie, with the company stating its products are in use across more than 100 countries. The company is founder-controlled, with Dipl.-Ing. Horst-Dieter Kassl serving as sole Managing Director (Geschäftsführer).

Name

Kassl

Legal name

Kassl GmbH

Website

https://kassl.de

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

Kassl GmbH is a German software company that develops OPC UA, Classic DA, XML DA, AE and HDA client toolkits and utilities for Embarcadero Delphi and C++ Builder developers, serving industrial automation, energy, automotive and manufacturing integrators worldwide.

Ownership category

akta.pro rank

Product category

Industrial Automation Software

NAICS

Software Publishers (513210)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Developer Experience Platforms for Enterprise (IDEs, CI/CD, Dev Portals) (HDAEAKAI)

Keywords

• OPC client software
• OPC UA toolkit
• Industrial automation software
• OPC XML DA gateway
• SCADA development tools

Headquarters

HQ city

Langen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software License Sales: One-time perpetual license fees for dOPC software products. Each developer license includes full source code and free runtime license for royalty-free distribution of developed applications.
2. Reseller Distribution: Products sold through Digistore24 online reseller platform. Customer receives download instructions and password via email after purchase.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Kassl develops and sells OPC (Open Platform Communications) client software development toolkits and supporting utilities for industrial automation developers. Its core offering, the dOPC Client Toolkit, enables programmers using Embarcadero Delphi and C++ Builder to build OPC UA, OPC Classic DA, OPC XML DA, OPC AE, and OPC HDA client applications. The product line is complemented by gateways (dOPC XGate, dOPC XCOM), a server emulator (dOPC Clone), and diagnostic/mobile clients (dOPC Explorer, dOPC Mobile Explorer).

Product overview

Kassl offers a suite of OPC (Open Platform Communications) client development tools and utilities. The core product is the dOPC Client Toolkit, a software development kit for Delphi and C++ Builder that supports multiple OPC specifications including OPC UA (Unified Architecture), OPC Classic DA, OPC XML DA, OPC Alarms & Events (AE), and OPC Historical Data Access (HDA). The product portfolio includes complementary utilities: dOPC Explorer (free test client), dOPC Clone (server emulator for testing), dOPC XGate (XML DA gateway), dOPC XCOM (XML DA client bridge), and dOPC Mobile Explorer (mobile OPC client). Together, these products enable developers to create, test, and deploy OPC client applications across Windows, Android, iOS, and Mac platforms.

Differentiator

Problem solved

Functional benefit

Brands

• dOPC: OPC Client Toolkit for Delphi and C++ Builder developers. Supports OPC UA, DA, AE, HDA & XML DA protocols.
• dOPC XGate
• dOPC XCOM
• dOPC Clone
• dOPC Explorer
• dOPC Mobile Explorer

Products and services

• dOPC Client Toolkit for Delphi OPC software toolkit supporting OPC UA, XML DA, DA, AE and HDA specifications. Allows building OPC client applications with GUI components that bind OPC item values directly to visual component properties. Supports creation of native OPC UA and XML DA clients for Android, Mac OS and iOS using a single code base.
• dOPC Client Toolkit for C++ Builder OPC framework for Embarcadero C++ Builder supporting OPC UA, Classic DA, XML DA and AE. Includes GUI components for binding OPC items to visual controls. No additional DLL or ActiveX controls needed.
• dOPC XGate OPC XML DA Gateway Server gateway that enlarges any COM DA based OPC server with an OPC XML-DA interface. No .NET Framework or web server required. Based on OPC XML DA specification 1.01, supports OPC DA 1.x, 2.x and 3.0 servers, Unicode, multi-server support, and runs as a service in the registered version.
• dOPC XCOM OPC XML DA Client OPC COM and DCOM based server that gives OPC COM clients access to OPC XML DA servers. Based on OPC XML DA specification 1.01, less than 1.5 MB, very easy installation, designed for Windows 11/10/8/7/Vista/XP.
• dOPC Explorer OPC Test Client

Quantifiable outcome

• Comprehensive OPC specification support covering UA, DA, AE, HDA and XML DA protocols in a single toolkit
• +2 more outcomes

Named customers18 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

Feature7 records

Partnerships

Three partnerships are on record, tiered core and minor.

• OPC FoundationcoreStrategic or Co-development PartnerKassl GmbH has been an OPC Foundation member for more than 10 years. The OPC Foundation is the governing body for OPC specifications including OPC UA, DA, AE, HDA and XML DA. As a member, Kassl contributes to and benefits from the OPC interoperability standards ecosystem.
• Digistore24minorChannel Partner/ Reseller/ DistributorDigistore24 serves as the online reseller for Kassl software products. Customers purchase products through Digistore24 and receive download instructions and passwords via email.
• Embarcadero TechnologiescoreTechnology or IntegrationEmbarcadero (Codegear, Borland) Delphi and C++ Builder development environments are the primary IDE platforms supported by Kassl's dOPC Client Toolkit. The partnership enables Pascal and C++ developers to create OPC client applications within familiar IDE environments.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Siemens AG: Both a Kassl customer and a major industrial automation incumbent whose SIMATIC portfolio includes native OPC UA support. Represents the broad-incumbent boundary of the market in which Kassl's toolkits are deployed.
• Matrikon (Honeywell): OPC connectivity product line now under Honeywell Process Solutions. Operates in the same OPC connectivity market as Kassl but as part of a much larger automation vendor portfolio, targeting similar enterprise process-industry customers.
• Beckhoff Automation: German automation vendor whose TwinCAT platform embeds OPC UA server/client functionality. Competes with Kassl indirectly by providing built-in OPC UA support inside a broader PC-based control platform, serving many of the same Siemens/ABB-style industrial customers.

Direct peers

• Kepware (PTC): Dominant commercial OPC server software (KEPServerEX) acquired by PTC, providing connectivity toolkits and OPC infrastructure used across the same enterprise customers (Siemens, ABB, GE ecosystems) as Kassl.
• Softing Industrial: German provider of industrial connectivity products including OPC server toolkits, edge gateways, and protocol converters. Comparable to Kassl in German origin, OPC focus, and target market of industrial software developers and system integrators.
• Software Toolbox: North American distributor and integrator of industrial connectivity software, including OPC client/server tools and HMI/SCADA integration components, with overlapping OPC tooling customers and similar system-integrator buyer personas.
• Prosys OPC: Finnish vendor of OPC UA SDKs and simulation tools for Java, .NET, and C++, serving the same OPC client/server development use cases as Kassl with comparable licensing models and industrial automation focus.
• OPC Labs: Developer of the QuickOPC library, a commercial OPC client toolkit for .NET, Java, and Python, with similar positioning as a developer-focused OPC SDK and overlapping customer base in industrial automation.
• Unified Automation: Provides commercial OPC UA client and server SDKs across C++, .NET, and Java, with a similar toolkit/license business model targeting industrial software developers. Directly comparable to Kassl's dOPC Client Toolkit in product category and developer audience.

Emerging players

• Eclipse Foundation (Milo / open62541): Stewards open-source OPC UA stacks (Eclipse Milo for Java, open62541 for C) used by industrial developers as free alternatives to commercial SDKs. Relevant to Kassl as an emerging pricing and adoption constraint in the OPC client toolkit market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/kassl-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Kassl