Fires affect the Amazon Forest and cause a variety of socioenvironmental problems. Monitoring the dynamic of forest fires is important to support both combatting and preventing wildfires. However, many studies reported discrepancies in the quantification of forests affected by fires, especially in the tropics. In this study, we aimed at assessing four operational burned area products. We defined a study area located in the southwest Brazilian Amazon and selected the year 2019. The assessment focused on evaluating the product's relative performance, stratified by forest and non-forest areas. The four products showed divergence, by up to 90.61% in their estimates of the total burned area (MAPBIOMAS with more extensive burned area mapping and MCD64A1 with more minor burned area mapping).