ChatGPT Atlas Ranked Worst for Privacy Among Browsers in 2025

A recent report by Digitain has revealed that the ChatGPT Atlas browser ranks as the least private web browser in 2025, failing all state partitioning tests designed to protect user privacy. This means that it cannot effectively prevent websites from tracking users across different sessions. In a surprising turn, the widely used Chrome browser also ranked poorly, scoring only 41 out of 100 for its ability to secure user connections to websites.

The findings stem from a comprehensive privacy assessment of 13 popular web browsers, which underwent rigorous testing across various security features. Each browser was evaluated on its capability to prevent user tracking through fingerprinting, block data collection from cookies and trackers, and maintain secure connections. The results culminated in a Privacy Risk Score that ranges from 1 to 99, with higher scores indicating poorer privacy protection.

Privacy Risk Scores Unveiled

According to the report, the ten browsers with the highest privacy risks are as follows:

– **ChatGPT Atlas**: Privacy Risk Score 100
– **Chrome**: Privacy Risk Score 76
– **Vivaldi**: Privacy Risk Score 75
– **Edge**: Privacy Risk Score 63
– **Opera**: Privacy Risk Score 58
– **Ungoogled**: Privacy Risk Score 55
– **Firefox**: Privacy Risk Score 50
– **Safari**: Privacy Risk Score 49
– **DuckDuckGo**: Privacy Risk Score 44
– **Tor**: Privacy Risk Score 40

From this analysis, it is evident that ChatGPT Atlas performed poorly across all privacy metrics, scoring just 1 point in anti-fingerprinting protection and 0 for blocking trackers. This lack of protection means that user data may be collected through cookies, query parameters, and content trackers without any defenses in place. The browser also scored only 24 out of 100 for connection and navigation security, indicating significant vulnerabilities.

Comparative Performance of Other Browsers

In contrast, Chrome, despite its position as the most popular browser globally, scored a Privacy Risk Score of 76. It achieved a score of 68 in preventing websites from identifying users but also received a dismal 0 for blocking trackers. This allows companies to track users’ activities across the web freely. Furthermore, Chrome’s connection security rating of 41 highlights its inadequacy when compared to privacy-focused alternatives.

Following closely is Vivaldi, which matched Chrome’s 68 in anti-fingerprinting but similarly failed to block any trackers, earning a 0 in that category. Its connection security score was slightly lower at 37, further underscoring its vulnerabilities despite marketing itself as a privacy-oriented option.

Next is Microsoft Edge, which tied with Chrome and Vivaldi for anti-fingerprinting at 68 but showed minor improvement in tracker blocking with a score of 15. Edge’s connection security matched Chrome at 41 points, indicating that while it performs marginally better, it still falls short of adequate privacy protection.

Rounding out the five least private browsers is Opera, which scored 68 for anti-fingerprinting and 41 for connection security. However, it demonstrated slightly better tracker blocking capabilities with a score of 25, positioning it ahead of Edge, Vivaldi, and Chrome in this specific area.

While AI-driven browsers like ChatGPT Atlas and Comet from Perplexity are gaining traction, they also raise security concerns. AI systems typically collect and analyze user data, which may lead to a greater accumulation of personal information than users are aware of.

The findings from Digitain’s report highlight the importance of user awareness regarding browser privacy and the need for better protective measures in the digital space. As online tracking becomes increasingly sophisticated, users may wish to consider alternatives that prioritize their privacy.