RDF

What RDF does

RDF Ltd. is a privately held Bulgarian software company founded in 2008 and headquartered in Sofia, operating with a workforce in the 11–50 employee band. The firm develops parametric modeling and semantic web software, with two named product lines: an IFC Engine — software oriented around the Industry Foundation Classes standard, the open data schema underpinning Building Information Modeling (BIM) interoperability — and a Geometry Kernel that underpins parametric 3D geometry operations. Together these position RDF in a deep-tech, developer- and integrator-oriented niche serving engineering, architecture, and BIM-adjacent workflows that demand structured 3D geometry and machine-readable semantic data exchange.

The technology stack is therefore classically CAD/BIM-oriented rather than AI-oriented, combining geometry computation with semantic web interoperability on top of an open standard. The commercial profile, however, is poorly documented in the available source material: no revenue, no funding rounds, no pricing model, no named customers, no partnerships, no leadership team, and no channel structure are disclosed. The corporate website (rdf.bg) at the time of capture returned only a loading/verification page, and the firmographic data carries extensive empty fields. As a result, RDF appears to be a small, specialized, privately held product company whose demonstrated technical identity centers on IFC/geometry tooling, but whose business model, traction, and strategic posture cannot be characterized beyond the verifiable scope above.

Name

RDF

Website

https://rdf.bg

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

11–50 employees

Short description

RDF Ltd. is a Bulgaria-based software company that develops parametric modeling and semantic web tooling, including an IFC Engine and Geometry Kernel, serving BIM, engineering, and architecture-adjacent workflows.

Ownership category

akta.pro rank

Product category

Engineering and BIM Software

NAICS

Custom Computer Programming Services (541511)

SIC

Services-Computer Programming Services (7371)

akta.pro primary industry

Reference Data Management (RDM) (HDAEADAE)

Keywords

• Parametric modeling software
• Semantic web software
• IFC engine tools
• Geometry kernel libraries
• BIM interoperability software

Headquarters

HQ city

Sofia

HQ country

Bulgaria

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations

Core offering

RDF Ltd. develops and sells parametric modeling and semantic web software for technical users, including an IFC Engine for BIM data interoperability and a Geometry Kernel for computational geometry operations. The offerings target engineering, architecture, and construction technology workflows that require standards-based data exchange and geometric computation.

Differentiator

Problem solved

Functional benefit

Products and services

• IFC Engine Software component for reading, writing, and processing IFC (Industry Foundation Classes) BIM data, enabling BIM interoperability for AEC software developers and engineering teams.
• Geometry Kernel Computational geometry library that provides geometric primitives and operations for use in parametric modeling, CAD, and other engineering software applications.

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves1 record

Direct peers

• Bricsys (BricsCAD): Bricsys offers BricsCAD, a DWG-based CAD platform with BIM capabilities and IFC support. It competes with RDF's parametric modeling and IFC engine offerings for cost-conscious CAD/BIM users.
• Solibri: Solibri specializes in BIM model checking and IFC-based quality assurance. It directly overlaps with RDF's IFC Engine use cases for model validation and serves similar architect/engineer customers.
• Open Design Alliance: Open Design Alliance provides commercial geometry/CAD libraries and development toolkits to software vendors. It directly mirrors RDF Ltd.'s Geometry Kernel and IFC Engine licensing model, serving the same OEM customer base building CAD/BIM applications.

Broad incumbents

• Bentley Systems: Bentley Systems provides infrastructure-focused BIM and engineering software with strong IFC interoperability. It is a broad incumbent that competes with RDF for engineering-firm and government infrastructure clients.
• Autodesk (Revit): Autodesk's Revit is the dominant BIM platform and ships native IFC support plus a broad geometry engine. It represents the largest incumbent threat to RDF's IFC Engine and any geometry-kernel licensing ambitions.
• Nemetschek Group: Nemetschek owns Graphisoft (ArchiCAD), Solibri, and other BIM brands, all of which embed IFC handling. It is a broad incumbent competing with RDF in the architectural BIM segment and increasingly in semantic BIM analytics.
• Trimble (Tekla): Trimble's Tekla Structures is a leading structural BIM platform with strong IFC interoperability. It is a broad incumbent competing with RDF for engineering and construction clients in structural modeling.

Emerging players

• Franz Inc. (AllegroGraph): Franz Inc. offers AllegroGraph, a graph database and semantic web platform. It overlaps with RDF Ltd.'s semantic web capabilities for linked-data and RDF-based applications in adjacent enterprise verticals.
• TopQuadrant: TopQuadrant provides semantic web, RDF, and knowledge-graph platforms for enterprise data integration. It is an emerging peer comparable to RDF's semantic web software side, though focused more on graph data than BIM.

Others

• BuildingSMART International: BuildingSMART is the standards body that maintains the IFC schema. While not a commercial competitor, it shapes the ecosystem in which RDF's IFC Engine operates and influences open-source alternatives that compete with RDF's offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/rdf-ltd-

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 RDF