Opener was developed to its current version through the Anti-Corruption Challenge Incubator, held by the International Monetary Fund in 2019-2020.

This is a demo version. All of your suggestions and comments are highly welcome! Write to us via Find more information and communicate with us on GitHub.

Opener is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version. For the full copy of the GNU Affero General Public License see:


Our datasets come from verified public sources.




This platform only uses a selection of indicators in order to assess the integrity of public procurements and gives a wide range of possibilities to create your own filters that can serve as indicators. Integrity indicators that are referred to on the page of each tender rely on peer-reviewed research conducted within the DigiWhist project that are now used in See more from their comprehensive review of objective corruption proxies in public procurement article.

For more information on red flags in public procurement, we recommend the resources made available by the Open Contracting Partnership.

Some examples of web tools that assess the integrity of public procurement elsewhere:

This platform does not propose to reveal corruption, but cross-matches publicly available datasets for the purpose of increasing transparency in how public finances are used.

None of the project partners are responsible for the use which might be made of the information published on this website.

Data Privacy


Personal Data processing

Purpose of processing Personal Data

Legal basis for processing Personal Data

Rights of the Data Subject