Bing News primarily shows headlines from Lean Left media outlets, an AllSides bias analysis found. Over a two-week period, Bing’s homepage displayed zero news sources rated Right or Lean Right by AllSides.

AllSides analyzed two weeks of content from March 9-22, 2023 on the Bing News homepage, Politics page, and for selected search terms. Bing News displayed far more articles with a AllSides Media Bias Rating™ of Lean Left than those with a Lean Right, Right, or Center rating. Based on this analysis, AllSides has issued a media bias rating of Lean Left for Bing News. Read the full Bing News bias analysis here.

On Bing News’ homepage, 83% of articles displayed over a two-week period were from media outlets on the left, 13% were from sources in the center, and 0% were from sources on the right. 

On Bing’s Politics page, 51% of articles were from outlets on the left, 28% from the center, and 8% from the right.

For selected search terms, such as “abortion” and “economy,” outlets on the right made up between 7-18% of resulting articles, while outlets on the left made up between 34-63% of articles. 

Each search term returned results from more outlets rated on the left than the right. 

See the full report here. 

Top Sources Curated on Bing News 

The top 6 most commonly curated outlets on Bing’s homepage are all rated Lean Left by AllSides. The top sources curated on Bing News’ homepage were The Associated Press (Lean Left) (17% of the content), USA Today (Lean Left) (15%), and ABC News (Lean Left) (13%).

On Bing News’ Politics page, the top sources were the Associated Press (Lean Left) at 11%, Newsweek (Center) at 7%, and NBC News (Lean Left) at 6%. Only one Right-rated outlet appeared as a top 10 source — Fox News, Right bias.

Note: CNN was rated Left at the time of this analysis. It is now rated Lean Left by AllSides.

AllSides ensured content collected from Bing News’ homepage and in search results was not impacted by personalization nor cookies.

AllSides Media Bias Ratings™ are driven by a balance of input from experts and average Americans across the nation and across the political spectrum and are based on multiple methodologies, including Editorial Reviews and Blind Bias Surveys. Our ratings reveal the average judgment of Americans — both experts and novices.


Bing News gave users an unbalanced perspective on major news stories. Biased search results have a grave impact on our understanding of the world around us. When we don’t have the full picture and cannot access the full scope of views, we are more likely to polarize against one another. Heavily biased search tools harm our democratic society, our communities, and our families. The AllSides Balanced Newsfeed and Balanced Search tool are solutions that allow users to better understand multiple perspectives and help people to think for themselves.

To view the full Bing News bias report, which includes details on methodologies, click here.

Please contact AllSides for inquiries about this analysis.

Research by Andrew Weinzierl, Research and Data Journalist at AllSides (Lean Left bias), and Clare Ashcraft, Bridging and Bias Assistant at AllSides (Center bias).

Visuals by Andrew Weinzierl. 

Reviews and edits by Julie Mastrine, Director of Marketing and Media Bias Ratings (Lean Right bias).