Seme4 are experts in Linked and Open Data

We deploy cutting edge technology in real-world commercial environments, providing complex data integration solutions with unparalleled flexibility and cost efficiency.

Drawing on many years of world leading research and thought leadership in Linked Data and Semantic Technologies we can offer a wide range of services.

With Seme4's help you can use Linked Data technologies to gain integrated access to the data in your enterprise and realise its full potential.

What we do

Drawing on many years of world leading research and thought leadership in Linked Data and Semantic Technologies we can offer a wide range of services

Web Applications

Utilising the Seme4 Platform we offer rapid application development, making best use of your data and taking advantage of Open and Linked Data.


Our team has unique experience in Open Data and Linked Data. We advise governments around the world, as well as companies and third sector organisations, both large and small.

Seme4 Platform

Our Platform offers a wide range of data processing, integration and publishing services, enabling both rapid application building and effective long-term maintenance.

SameAs Services

Seme4 is now home to the Linked Data URI discovery site, and also offers domain-specific sameAs™ services for many organisations.

Geospatial services

We have worked extensively with geospatial data and offer a variety of processing and visualisation tools.

Data conversion

Seme4 routinely uses data from a huge range of sources, and has tools to handle data and text from databases, CSVs, spreadsheets, web sites, plain text and PDFs.

Our technology

Seme4 Platform

The Seme4 Platform captures the expertise and capabilities that Seme4 has built up over many years of working with Linked Data and deploying applications. It makes data integration easy, both within the enterprise and as a publishing activity, and provides end to end support for all Linked Data needs.


Seme4  are experts in identifier (URI) management. We have a wide range of tools to support URI equivalence discovery and management, including our unique sameAs services. As a service to the community, we run which is the widely-used Linked Data discovery service, linking from one URI to equivalent ones.

Location Awareness

Throughout the Seme4 Platform development, Seme4 has worked with the UK Ordnance Survey, and so the Platform has outstanding capabilities when dealing with location and geography. It can therefore provide facilities that normally only heavyweight GIS systems would be able to offer.


Hampshire Open Data

The Seme4 Platform used to Rapidly Build an Exciting Application


Ethos Matcher

Open Architecture Mobile App



Finding Linked Data URIs



Browse Multiple Sources as One


RAGLD Property Info

Location-based Linked Data


UK Photonics Portal

A Dynamic Linked Data Portal for UK Photonics Resources


See UK

See UK - Visualise Statistics Against Population and Area


See Soton

See Soton - Visualise Statistics with a Local Authority


Key Personnel

Hugh Glaser

Chief Executive Officer

Hugh has more than 40 years experience in a variety of Computer Science disciplines, which is invaluable in creating elegant solutions to complex problems.

Ian Millard

Director, Lead Technologist

Ian has been working with Semantic Web and Linked Data technologies since 2002. He leads the technical and development work at Seme4.

Tim Organ


Tim has been involved in the software products and services sector for 20 years, building a wealth of commercial and delivery experience.

Professor Dame Wendy Hall DBE FRS FREng

Non-Executive Director

Wendy is a pioneer in hypertext and Web Science, and is frequently named as one of the most influential people in IT and technology.

Professor Sir Nigel Shadbolt FBCS FREng


Nigel is internationally renowned for his work in Open Data and transparency, and is an influential adviser on governmental policy in these fields.

Our Clients