Add-in Express Ltd.

What Add-in Express Ltd. does

Add-in Express Ltd., operating through the Polish legal entity Office Data Apps sp. z o.o. (Lomianki, Poland; originating from Gomel, Belarus), develops commercial frameworks and tools for building Microsoft Office extensions. Founded in 2004, the company targets professional software developers and independent software vendors (ISVs) who build add-ins, ribbons, task panes, and Outlook plug-ins on the Office platform. The flagship product is Add-in Express for Office and .NET (currently at version 10.x), with companion editions for Delphi VCL, a Security Manager for Outlook that suppresses Outlook security prompts, Regions for Outlook/VSTO, a Ribbon Designer for SharePoint, and WiX-based installer tooling. Underlying technology wraps Microsoft Office COM, VSTO, and Ribbon extensibility APIs into higher-level component frameworks so that developers can build Office customizations without working directly against low-level Office interop.

The business operates three revenue streams: commercial software licenses (per-developer and per-team subscriptions, plus enterprise/site licenses), subscription products such as Security Manager for Outlook, and custom development services for clients requiring bespoke Office integration work. Distribution is digital and global, complemented by large self-supporting developer forums (.NET/VSTO with 12,800+ topics, VCL with 2,184 topics) and reference deployments in third-party products from companies including Ablebits, Shared Email Templates, and BOE Information Systems. The firm is privately held, discloses no external funding, and operates with a small headcount in the 11-50 employee band.

Strategically, Add-in Express occupies a mature niche that is structurally challenged by Microsoft's pivot from COM-based add-ins to web-based Office.js add-ins and Copilot-driven extensibility. Recent moves — restricting VCL and VSTO editions to custom development only, discontinuing the Internet Explorer add-in product, and maintaining rather than expanding the self-serve product surface — indicate a managed-harvest posture. The company sustains revenue via an installed base of developers and a small number of ISV technology-license customers, but the addressable market is contracting as Microsoft redirects the Office extensibility ecosystem toward web and AI surfaces.

Name

Add-in Express Ltd.

Legal name

Office Data Apps sp. z o.o.

Website

https://add-in-express.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

Add-in Express Ltd. (Office Data Apps sp. z o.o., Poland) develops commercial frameworks and tools that enable software developers and ISVs to build Microsoft Office add-ins, ribbons, and Outlook plug-ins on .NET, VSTO, and Delphi VCL platforms, monetizing via subscriptions, licenses, and custom development services.

Ownership category

akta.pro rank

Product category

Office Development Frameworks

NAICS

Software Publishers (5132), Custom Computer Programming Services (541511)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming Services (7371), Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Low-Code/No-Code Integration Builders (BPAMAOAL)

akta.pro secondary industries

Data App Builders (Forms, Portals & Internal Tools) (HDAEAKAK), Industry-Specific Low-Code Platforms (Vertical App Platforms) (HDAEAKAL)

Keywords

• Office add-in development
• COM add-in framework
• Developer component tools
• Microsoft Office extensions
• Visual Studio plugins

Headquarters

HQ city

Gomel

HQ country

Belarus

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licenses and Subscriptions: Developer licenses sold as subscriptions that include 12 months of free minor and major updates and technical support. Subscriptions provide access to all product versions released during the subscription term. After subscription expires, users can continue using the last version obtained but cannot install newer versions without renewal.
2. Enterprise and Team Licenses: Volume licensing options for teams and enterprises with multiple developers. Pricing based on team size and license type.
3. Custom Development Services: Custom development services for building custom-tailored Office add-ins using Add-in Express core technology. Offered when standard product capabilities need extension for specific enterprise requirements.
4. Royalty-Free Distribution: License allows free distribution of applications built with Add-in Express without additional runtime fees or per-end-user licensing costs.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Add-in Express provides comprehensive frameworks and development tools for creating Microsoft Office extensibility projects, including COM add-ins, smart tags, RTD servers, Excel user-defined functions (UDFs), and XLL add-ins. Its offerings support .NET languages (VB.NET, C#, C++/CLI) within Visual Studio and Delphi VCL, covering all Office versions from 2000 through 2024 across applications such as Outlook, Excel, Word, PowerPoint, Access, and Project from a single codebase. The company also supplies deployment, security, and WiX-based installer utilities plus custom development services.

Product overview

Add-in Express Ltd. offers a comprehensive suite of development frameworks and tools for building Microsoft Office extensions and Internet Explorer add-ons. The core product portfolio includes Add-in Express for Office and .NET (for .NET developers using Visual Studio), Add-in Express for Office and Delphi VCL (for Delphi developers), and Add-in Express for Internet Explorer and .NET (discontinued). Supporting modules include Security Manager for Outlook (disabling security alerts), Add-in Express Regions for Outlook/VSTO (customizing Outlook windows), Ribbon Designer for SharePoint/Office 365, and WiX deployment tools (VDProj to WiX Converter and Designer for WiX Toolset). The products enable developers to create COM add-ins, smart tags, RTD servers, Excel UDFs/XLL add-ins, and custom task panes with visual designers and RAD paradigms across Office versions 2000-2024.

Differentiator

Problem solved

Functional benefit

Brands

• Add-in Express for Office and .NET: Framework for developing Microsoft Office extensibility projects using .NET technologies
• Add-in Express for Office and Delphi VCL
• Add-in Express for Internet Explorer
• Security Manager for Microsoft Outlook
• Add-in Express Regions for Microsoft Outlook and VSTO

Products and services

• Add-in Express for Office and .NET Comprehensive framework for developing Microsoft Office extensions (COM add-ins, smart tags, RTD servers, Excel UDFs, XLL, and Automation add-ins) using .NET languages (VB.NET, C#, C++/CLI) in Visual Studio. Supports Office 2000 through 2024 across Outlook, Word, Excel, PowerPoint, Access, Project, Visio, and other Office applications from a single codebase. Aimed at professional software developers and dev teams building Office extensions.
• Add-in Express for Office and Delphi VCL Visual component set for writing COM add-ins, smart tags, and RTD servers in Delphi. Supports Delphi XE2 through Delphi 12 Athens and Office versions from 2000 to 2024. Designed for Delphi developers building Office extensibility solutions.
• Security Manager for Microsoft Outlook Component that allows developers to disable Outlook security alerts when programmatically sending emails or accessing the Outlook object model or address books. Available in .NET, VCL, and ActiveX editions supporting Outlook 2000 through 2021. For developers building Outlook automation and add-in solutions.
• Add-in Express Regions for Microsoft Outlook and VSTO Visual Studio Tools for Office extension that enables customization of Outlook windows and panes with custom .NET forms. Supports Outlook 2003 through 2021. For developers building VSTO-based Outlook add-ins that need advanced form and view regions.
• Ribbon Designer for SharePoint and Office 365 Rapid application development tool for customizing the Server Ribbon UI of SharePoint and Office 365 solutions. Supports SharePoint 2010 Foundation/Standard/Enterprise and SharePoint Online. Targeted at developers building SharePoint and Office 365 ribbon customizations.
• VDProj to WiX Converter Utility tool for converting existing Visual Studio setup projects (VDProj) to WiX format for modern deployment scenarios. For developers migrating Office add-in installation projects to the WiX toolset.
• Designer for WiX Toolset Visual designer integrated into Visual Studio for creating WiX-based installer projects for Office add-ins. For developers needing a graphical interface to build WiX deployment packages for their Office extensions.
• Custom Development Services for Microsoft Office Custom development services for building custom-tailored Office add-ins using Add-in Express core technology, including custom solutions for Microsoft Office, Internet Explorer, Outlook Express and Windows Mail, and migration of Office solutions to .NET. Offered to enterprise customers with requirements that extend beyond standard product capabilities.

Quantifiable outcome

• Reduces development time by at least half compared to manual COM add-in development
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Syncfusion: Syncfusion's Essential Studio suite includes Office file-format libraries (DocIO, XlsIO, PDF) and UI controls for .NET developers. It is a broader component platform but overlaps meaningfully with Add-in Express in Office document and add-in scenarios.
• Telerik (by Progress Software): Telerik offers a broad .NET component suite including UI, reporting, and document-processing libraries. While not Office-add-in specific, it competes for the same .NET developer budget and serves enterprise teams building Office-adjacent applications.

Direct peers

• Aspose: Aspose sells .NET component libraries for creating, manipulating, and converting Office file formats (Word, Excel, PowerPoint, Outlook). It targets the same developer audience as Add-in Express and competes head-to-head on Office document and add-in tooling.
• GrapeCity (MESCIUS): GrapeCity/MESCIUS offers developer components including Spread.NET for Excel-compatible grids and Document APIs for Office formats. It overlaps with Add-in Express's .NET developer audience and competes for the same Office-centric .NET development budget.
• ComponentOne (by MESCIUS): ComponentOne is a .NET component suite from GrapeCity/MESCIUS that includes FlexGrid, reporting, and document APIs used by developers building data-centric Office-style applications. It overlaps with Add-in Express's enterprise developer audience.
• SpreadsheetGear: SpreadsheetGear provides Excel-compatible spreadsheet components for .NET developers, including a calculation engine and APIs for building Excel-style applications. It targets the same developer niche as Add-in Express's Excel UDF/XLL tooling.
• DevExpress: DevExpress provides .NET UI controls and Office-inspired components (including spreadsheet, richtext, and reporting controls) used by developers building Office extensions and Office-style applications. It is one of the largest .NET component vendors competing for similar buyers.

Emerging players

• GemBoxSoftware: GemBoxSoftware offers .NET libraries for reading, writing, and converting Office file formats (Word, Excel, PowerPoint, PDF). It competes for the same developer segment as Add-in Express, focused on .NET Office document processing.
• SoftArtisans: SoftArtisans develops Office document generation and manipulation libraries for .NET developers, including tools for Word, Excel, and PowerPoint. It overlaps with Add-in Express on Office document workflows and enterprise developer tooling.

Regional players

• DlhSoft: DlhSoft provides .NET and VSTO project management components, including Gantt charts and hierarchical task views, that integrate with Microsoft Office. It overlaps with Add-in Express on Office add-in development, particularly for VSTO/Outlook scenarios.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/addinexpress
• Facebookfacebook.com/addinexpress
• LinkedInlinkedin.com/company/add-in-express

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 Add-in Express Ltd.