Tests & comparative studies

In this section, you will find NGO reports and comparative studies about flying and the environment.

Studies with overall rankings and individual evaluations

atmosfair regularly achieves first place in the rankings of offsetting providers. All studies in which offsetting providers were evaluated according to different criteria are presented here.
Stiftung Warentest – Test winners for the holidays (de)

Stiftung Warentest

In the test magazine "Test winners for the holidays" from December 2013, Stiftung Warentest examined 46 German charitable organisations in the areas of animal and environmental protection. In the results, atmosfair placed at the very top and together with two other organisations achieved the best marks; no organisation was evaluated higher.

Websites of carbon offset providers (de)

fvw, the travel industry business magazine

fvw, the travel sector business magazine tested websites of several carbon offset providers. atmosfair ranks first, leading the ranking by far. In particular, the testers praised the comprehensive information and usability of the atmosfair website.

Offset Providers in Germany (de)

University of Applied Sciences, Eberswalde

This study, published by the University of Applied Sciences in Eberswalde, analyses offset providers in Germany. atmosfair is the only carbon offset provider to be rated "very good".

A Benchmarking of European CO2-Offsetter (de)

University of Graz

Once again, atmosfair ranked highest in a comparative study. atmosfair is the only service provider in this study to be "very recommended".

Etude comparative des programmes de compensation volontaire de CO2 (fr)

Université Libre de Bruxelles

The diploma thesis of André Heughebaert of the University of Brussels compares CO2offsetters and rates atmosfair the most recommendable.

Voluntary Offsets For Air-Travel Carbon Emissions (en)

Tufts University

Tufts University in Boston rates thirteen CO2 offsetters on quality of projects and calculation of emissions.

Test Offsetter (en)


A rating of CO2 offsetters in which atmosfair was the most highly rated.

Offsetting carbon emissions (en)

BBC Wildlife Magazin

atmosfair is the most highly rated offsetter in a BBC Wildlife ranking, achieving 8 out of 10 points.

Further studies

Also in other studies on the subject of flying and CO2 compensation atmosfair is always mentioned as a positive example.
Striking a balance (de)


In its February 2011 issue, Ökotest wrote: "The German non-profit provider atmosfair is to be recommended without exception. The quality of its emissions calculator is exemplary… atmosfair works transparently, the projects are CDM-certified…"

The ENDS guide to Carbon Offsets (en)

Environmental Data Services

A comprehensive summary of CO2offsetters. Regarding offset quality, this paper reports: "atmosfair has one of the best offset portfolios in the entire industry."

For a fair taxing over the clouds (de)


The German environmental group BUND presents a study on the introduction of a kerosene tax and the environmental impact of travelling by plane.