Antenna House

What Antenna House does

Antenna House, Inc. is a Delaware-incorporated US operating subsidiary of Antenna House Inc. (Japan), founded in 2003, that develops standards-based document formatting and conversion software for enterprise and developer customers. Its flagship product, Antenna House Formatter, is a publishing engine that generates PDF output from XML or HTML using XSL-FO or CSS, with support for over 80 languages including complex scripts (Hebrew, Arabic), MathML equations, drop caps, and QR barcodes. The Office Server Document Converter (OSDC) converts Word, Excel, PowerPoint, and RTF documents to PDF, SVG, and image formats on the server side using a proprietary direct-conversion engine that does not require Microsoft Office or Adobe software — a key value proposition for cloud and enterprise deployments seeking to avoid server-side licensing exposure. Supporting products include HTML on Word, Docx to HTML (Word-to-HTML conversion), the Antenna House PDF API for command-line PDF manipulation, the AH Regression Testing System for automated PDF comparison, and a Word API currently in alpha.

Name

Antenna House

Legal name

Antenna House, Inc.

Website

https://antennahouse.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

51–100 employees

Short description

Antenna House develops standards-based document formatting and conversion software, including Formatter (XSL-FO/CSS to PDF) and OSDC (Office to PDF without Microsoft/Adobe), serving enterprise customers in technical documentation, publishing, and document management.

Ownership category

akta.pro rank

Product category

Document Processing and Conversion Software

NAICS

Software Publishers (5132), Software Publishers (513210)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Enterprise Content Management (ECM) Suites (HDAEAGAB)

akta.pro secondary industry

Document Creation & Office Suites (BPAMAMAD)

Keywords

• Document conversion software
• PDF generation tools
• XSL-FO formatting
• Server document conversion
• Office to PDF

Headquarters

HQ city

New Castle

HQ country

United States

HQ region

North America

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 Licenses (Perpetual): One-time perpetual licenses for software products. Customers pay upfront for permanent use of the software. Available for all products including Formatter, OSDC, HTML on Word, PDF API, and Docx to HTML.
2. Annual Maintenance: Annual maintenance contracts providing updates, support, and access to new versions released during the maintenance period. Typically priced at 20% of perpetual license cost per year.
3. Subscription Licensing: Yearly subscription model with maintenance included. Available as alternative to perpetual licensing for products like PDF API and Docx to HTML.
4. Enterprise/OEM Licensing: Re-distribution (OEM) and ASP licenses for embedding products in systems or providing services to third parties. Custom pricing through sales contact.
5. Add-on Products: Optional add-on products for Formatter including Web Interface, I18N Index Library, CGM Option, SVG Output, Barcode Generator, PANTONE, PostScript Output, MathML, Word Output, and XPS Output.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Antenna House develops and sells standards-based document formatting and conversion software for enterprise and mid-market customers. Its core products include the Antenna House Formatter (an XSL-FO/CSS publishing engine that generates PDF from XML/HTML), the Office Server Document Converter / OSDC (server-side conversion of Word, Excel, PowerPoint and RTF to PDF, SVG and image formats without requiring Microsoft Office or Adobe), HTML on Word and Docx to HTML (DOCX-to-HTML conversion tools), the Antenna House PDF API (command-line PDF editing and PDF/A conversion), the AH Regression Testing System for PDF comparison, and the Word API for server-side Word document manipulation. The suite is sold primarily via perpetual and subscription licenses with annual maintenance, plus OEM/ASP re-distribution rights.

Product overview

Antenna House offers a comprehensive document software suite focused on standards-based PDF generation and document conversion. The core products include Formatter (XSL-FO/CSS publishing engine for PDF output), Office Server Document Converter (OSDC, server-side Office-to-PDF/HTML/SVG conversion without Microsoft Office), HTML on Word and Docx to HTML (Word-to-HTML conversion tools), and PDF API (command-line PDF editing). Related tools include AH Regression Testing System for PDF comparison and Word API for Word document manipulation. Add-on modules extend Formatter with SVG Output, Barcode Generator, MathML, and other specialized capabilities. All products support XSL-FO and CSS standards with DITA compatibility.

Differentiator

Problem solved

Functional benefit

Products and services

• Antenna House Formatter Standards-based publishing engine that generates PDF from XML or HTML using XSL-FO or CSS Paged Media, with 21 years of development. Supports 80+ languages including complex scripts (Hebrew, Arabic), MathML equations, QR barcodes, drop caps, and runs on Windows, Linux, Mac, Apple M1, and AWS Graviton2. Sold as a perpetual license (pricing via sales contact) with annual maintenance, for software companies and documentation teams that need high-fidelity, standards-compliant PDF output.
• Office Server Document Converter (OSDC) Server-side conversion library that converts Microsoft Word, Excel, PowerPoint, and RTF documents into PDF, SVG, TIFF, JPEG, PNG, INX, and XPS files using a proprietary direct-conversion engine that does not require Microsoft Office or Adobe software on the server. Offers .NET, COM, Java, and C/C++ APIs (distributed via NuGet) for embedding into enterprise applications and document automation pipelines on Windows and Linux servers.
• HTML on Word Windows desktop tool that converts DOCX files edited in Microsoft Word into clean, editable HTML for website and CMS publishing. Includes a Word add-in and a Word2HTML command-line program, supporting index links, footnotes, and HTML5/XHTML 1.0 output, targeted at web producers, content teams, and documentation publishers.
• Docx to HTML Server-side library that converts DOCX files into HTML using a proprietary conversion engine that does not require Microsoft Word. Runs on Windows Server and Linux, with .NET and Java interfaces plus command-line, and is offered under Server Standard, Non-Production Plus, and OEM/ASP licenses for enterprise document automation workflows.
• Antenna House PDF API Command-line program for PDF editing functions including obtaining PDF information, merging, splitting, watermarking, applying security settings, text extraction, and PDF/A conversion. Available under Server, Standalone/Developer, and bundled-with-Formatter-or-OSDC licensing, and supports both perpetual and subscription models with annual maintenance, for developers and integrators building automated document processing pipelines.
• AH Regression Testing System Automated PDF comparison software that highlights textual and visual differences and compares versions of Formatter output. Sold as a standalone product with 30-day trial download, used by Formatter users to validate the impact of Formatter revisions on existing document output.
• Office Servers Word API Multi-functional server-side processing library for Word documents that supports data-merging (simple, compound, and nested table types), document comparison, unlinking sub-documents, and embedding linked images, plus document inspection. Currently in alpha testing and targeted at enterprise document automation workflows.

Quantifiable outcome

• Over 100,000 documents converted for single customer using OSDC
• +1 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability7 records

Feature8 records

Partnerships

Four partnerships are on record, tiered minor and core.

• PDF AssociationminorStrategic or Co-development PartnerActive member of the PDF Association, participating in the industry body for PDF technology standards and best practices.
• TekomminorStrategic or Co-development PartnerMember of Tekom, the European association for technical communication, supporting industry standards and professional development.
• CIDM (Center for Information-Development Management)minorStrategic or Co-development PartnerMember of CIDM, contributing to the information development management community and industry best practices.
• NuGetcoreTechnology or IntegrationOSDC library available directly via NuGet package manager for easy integration into .NET development environments. Allows developers to install and start converting documents in minutes.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Adobe: Adobe Acrobat, PDF Services API, and Document Services broadly address PDF generation, conversion, and archival. As a broad incumbent, Adobe overlaps with Antenna House but typically at higher price points and with much wider product breadth.
• Foxit Software: Foxit offers a broader portfolio including PDF readers, editors, SDKs, and document management. Overlaps with Antenna House in PDF generation and document conversion but serves wider end markets.

Direct peers

• Muhimbi: Muhimbi specializes in PDF conversion and processing for SharePoint, Office 365, and Power Automate. Targets similar document automation use cases as OSDC and PDF API.
• PSPDFKit: PSPDFKit delivers document processing and PDF SDKs for web, mobile, and server. Competes in document conversion, PDF generation, and editing — closely aligned with Antenna House's product suite.
• Aspose: Aspose provides APIs for converting Word, Excel, PowerPoint, and PDF documents across server environments. Highly comparable to Antenna House's OSDC and Formatter in target use cases and customer base (developers needing programmatic document conversion).
• Apryse (formerly PDFTron): Apryse offers document processing SDKs for PDF generation, viewing, conversion, and editing across .NET, Java, and web platforms. Directly competes with OSDC and PDF API in server-side document workflows.
• RenderX: RenderX provides XSL-FO-based PDF formatting engines (XEP) and document composition tools. Direct competitor to Antenna House Formatter in XSL-FO standards-based PDF generation.
• iText: iText provides Java and .NET PDF libraries for PDF creation, manipulation, and digital signatures. Comparable to Antenna House PDF API and Formatter for server-side PDF generation and processing.

Emerging players

• Docparser: Docparser provides cloud-based document parsing and data extraction from PDFs and Word files. An emerging player in adjacent document automation, intersecting with Antenna House's conversion use cases but focused on data extraction rather than format conversion.
• Apache FOP: Apache FOP is an open-source XSL-FO processor that generates PDF, PS, and other outputs. Directly competes with Antenna House Formatter's XSL-FO capabilities as a free alternative, particularly attractive to cost-sensitive enterprise teams.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/antennainfo
• GitHubgithub.com/AntennaHouse
• LinkedInlinkedin.com/company/antenna-house-inc

Revenue estimate

Valuation estimate

Number of profiles

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 Antenna House