Ad Fontes Media, PBC is a public benefit corporation dedicated to assessing news source reliability and bias to combat misinformation and promote media literacy. Founded by patent attorney Vanessa Otero, the company is renowned for creating and maintaining the Media Bias Chart®, an interactive tool that plots news sources on a spectrum of political bias (left to right) and reliability (original fact reporting to opinion or fabricated content). Their methodology involves a multi-analyst rating system, considering factors like expression, veracity, and headline accuracy. Ad Fontes Media aims to empower news consumers to make informed choices about their media consumption and to encourage a more balanced and factual news ecosystem.
Serves as the central administrative and operational hub for the organization, coordinating research, data analysis, product development, and outreach efforts for the Media Bias Chart® and related services.
As an organization with a significant remote workforce and a focus on digital products, the physical headquarters is likely a functional administrative office rather than a large campus with notable architectural features. Emphasis is on efficient operations supporting their analytical work.
The work culture at Ad Fontes Media is likely mission-driven, analytical, and collaborative, with a strong emphasis on accuracy, non-partisanship in analysis, and critical thinking. Given their operational model, there's a strong element of remote work proficiency and digital collaboration.
The headquarters, though potentially modest, represents the core of Ad Fontes Media's commitment to providing transparent, data-driven assessments of news content and fostering media literacy globally.
While headquartered in the United States, Ad Fontes Media's analysis and the Media Bias Chart® are utilized by individuals, educators, and organizations globally. They rate news sources from various countries, reflecting the international nature of news consumption and the universal need for media literacy. Their team members and analysts also contribute from diverse geographic locations, supporting their worldwide operational reach and impact.
PO Box 702
Lafayette
CO
USA
Address: N/A
To leverage specialized talent in media analysis, data science, and technology from across the United States and potentially internationally, supporting their global mission of rating news sources and promoting media literacy.
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As of April 2025, Ad Fontes Media' leadership includes:
Ad Fontes Media has been backed by several prominent investors over the years, including:
Specific executive new hires or exits at Ad Fontes Media are not always widely publicized as they are a private company. Any major changes would likely be announced on their official website or LinkedIn page. No major high-profile executive changes have been broadly announced in the last 12 months.
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Ad Fontes Media likely uses common professional email formats, typically incorporating the employee's name. The most probable formats are [first].[last]@adfontesmedia.com or [firstinitial][last]@adfontesmedia.com.
[first].[last]@adfontesmedia.com
Format
vanessa.otero@adfontesmedia.com
Example
70%
Success rate
PR Newswire • January 24, 2024
Ad Fontes Media announced the release of the 11th edition of its flagship Media Bias Chart®, featuring updates and new ratings for numerous news sources. This release aims to provide critical media literacy tools ahead of the 2024 U.S. election season, helping voters navigate a complex information landscape....more
Poynter • July 19, 2023
Poynter's MediaWise initiative announced a partnership with The Factual and Ad Fontes Media to enhance news literacy efforts. This collaboration aims to combine their respective strengths in media ratings and education to provide more robust tools for teaching and learning about media bias and reliability....more
Editor & Publisher • October 20, 2022
Vanessa Otero, CEO of Ad Fontes Media, discussed the methodology and updates to the Media Bias Chart. She emphasized the importance of human analysis combined with a structured rubric to assess news sources, aiming for transparency in how media is rated for bias and reliability....more
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