The claim has also appeared elsewhere on X as well as Facebook (including here and here).
Corruption rankings
Different organisations have their specific methodology for computing corruption rankings for countries worldwide.
The Corruption Perception Index published by Transparency International, a civil society organisation, is one of the most extensive and covers 180 countries.
The index ranks countries based on perceived levels of public sector corruption using opinion surveys and expert assessments (archived here). Countries are scored between 0 (highly corrupt) and 100 (very clean).
In the 2023 ranking, Nigeria scored 25 out of 100, while Kenya scored 31 (archived here).
Transparency International ranked Somalia as the most corrupt country in Africa with a score of 11 while Seychelles was named the least corrupt country on the continent, scoring 71.
Between 2019 and 2023, Nigeria and Kenya have yet to score up to 50 points, which is the mid-point on the ranking.
The Political Corruption Index by the Varieties of Democracy Institute, a research institute at Sweden’s University of Gothenburg, also ranks the incidences of corruption high in Nigeria and Kenya (archived here).
The index uses a score of between zero and one. Zero represents a low presence of political corruption and one indicates high political corruption.
In 2023, Nigeria scored 0.92 points while Kenya scored 0.52 points. The Institute again ranked Seychelles as the least corrupt country in Africa with a score of 0.05 points.
AFP Fact Check has debunked several claims on political issues across Africa here.