How Opentender Works


Opentender is built upon robust data collection and processing software that gathers procurement data from about 20 various sources. When there is no open data available we extract the information from thousands of web pages to arrive at a structured database. After that we group together all publications describing each tender and eventually create a final image that most accurately describes the particular tender. Source systems and data differ from country to country, so a tailored piece of software is created for each source separately.

Read more about Challenges, Data processing, Raw data, Challenges, Methods, Data Validation.


Opentender uses public procurement performance indicators based on a broad set of scientific analyses, synthesized and taken further in our own research: for transparency indicators see Methods Paper on Fiscal Transparency, for integrity indicators see Methods Paper on Corruption Risk Indicators. The overarching good procurement score is the simple average of the three composite scores. All of these indicators are based on objective data, are directly actionable by public and private actors, and they are transparently and unambiguously calculated. If you find any error in the formulas, please notify us at

Any indicator based on a single tender is usually not reliable enough, hence it is recommended to look at multiple tenders and the whole market.

Maps and NUTS Codes

Opentender displays NUTS Codes based maps.
Missing codes in addresses have been assigned with:
TERCET NUTS-postal codes matching © GISCO - Eurostat
Used Shapes:
NUTS Administrative boundaries © GISCO - Eurostat © EuroGeographics © UN-FAO © Turkstat


The dashboards provide you with state-of-the-art visualisations of procurement data in four categories:

Market Analysis

This dashboard provides overview of public procurement markets, helping buyers and bidders to tender more effectively.


This dashboard allows you to analyse and benchmark the degree of transparency in public procurement tenders.


This dashboard allows you to analyse and benchmark public procurement integrity risks.


The search function is a powerful tool to drill down into the data and find a specific tender, buyer, or supplier you are looking for. You can also create individual custom searches from more than 30 additional parameters, including the indicators.


To enable full access, every component (sectors, branches, regions, companies, authorities, and tenders) in the Opentender database has an individual profile showing detailed information. Depending on its type, the profile shows a variety of visualisations such as graphs, maps, and charts providing you with a deep level of insight into the database. You can view the profiles by simply clicking on the respective name.