An AllSides analysis of Bing News found that it displayed more sources with an AllSides Media Bias Rating™ on the left than the center or right, largely aligning with data from previous years.
Of 177 articles evaluated over a two-week period in Sept. 2025, Bing News displayed:
- 72% of articles from outlets AllSides rates on the left
- 22% from the center
- 5% from the right
- 2% Not Rated by AllSides.
The analysis looked explicitly at Bing News’ “Top Stories” and “U.S. News” sections, which are not personalized for individual users.
Breaking down the bias ratings further:
- 15% of Bing News articles from outlets rated Left
- 56% rated Lean Left
- 22% Center
- 1% Lean Right
- 3% Right.
Note: Percentages are rounded to whole numbers; totals may not sum exactly due to rounding.
The top five sources appearing the most often were Associated Press (Left bias), USA Today (Lean Left bias), Washington Post (Lean Left bias), ABC News (Lean Left bias), and Wall Street Journal News (Center bias).
In the “Top Stories” section alone, the AllSides found 80% of articles were from outlets on the left (18% Left, 63% Lean Left), 18% from Center-rated outlets, and 2% from outlets on the right (2% Right, 0% Lean Right).
History of Bing News Bias: AllSides Analysis
Compared to our 2023 analysis of Bing’s “Top Stories” section, the results were relatively stable. In 2025, there was a 3% decline in outlets on the left, 4% gain in Center-rated outlets, and 1% gain in outlets on the right.
Read the full report on AllSides’ 2025 Bing News Analysis here.
Bias in News Aggregators
The AllSides News Aggregator Bias Chart, first released in 2024, plots the political bias of popular news aggregators. AllSides has found a similar pattern among other news aggregation services, including Apple News, NewsBreak, SmartNews, and Yahoo! News — all of which favor news outlets on the left. Just because the news is aggregated from different sources does not mean readers are getting the full picture.
AllSides Media Bias Ratings™ reflect the average judgment of all Americans, not just a panel of insiders. Ratings are driven by a balance of input from experts and ordinary people across the political spectrum to reveal the average judgment of Americans. AllSides uses multiple methodologies to rate bias, including Editorial Reviews and Blind Bias Surveys of Americans.
Please contact AllSides for inquiries about this news aggregator bias analysis.
Clare Ashcraft is the Bridging Coordinator and Media Analyst at AllSides. She has a Center bias.
Visuals by Andrew Weinzierl, Director of Research at AllSides (Lean Left bias).
Reviews and edits by Julie Mastrine, Director of Communications and Bias Services (Lean Right bias).
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