Blab Tech
Flo Health Tops Sifted Consumer 100 Ranking at SXSW London
On June 11, 2026, during the SXSW London awards ceremony, Flo Health—women’s health’s flagship platform—was crowned number one in Sifted’s inaugural Consumer 100 list. The accolade, Europe’s first dedicated annual ranking of breakout consumer‑tech startups, highlighted Flo’s mainstream adoption, cultural momentum, and global reach.
Sifted’s scoring framework blends hard data with expert judgment. Quantitative signals—fundraising history, funding velocity, investor strength, employee growth, and consumer traction—feed into an algorithm, while judges from Sifted’s intelligence and editorial teams, together with SXSW representatives, assess each entrant on three dimensions: reach, habit, and buzz. Reach measures how widely a product is adopted; habit gauges how deeply it is woven into users’ daily lives; buzz captures the cultural conversation surrounding the brand. The final list is intended to spotlight companies that are not only popular but also positioned for cross‑border expansion.
Flo Health is a femtech unicorn, reaching that status in 2024 after a stake purchase by General Atlantic. With 81 million monthly active users worldwide, the app offers cycle and ovulation tracking, fertility and pregnancy guidance, perimenopause symptom monitoring, daily educational content, and a private community. A network of over 100 medical experts supports the platform, and the Pass‑It‑On Project has already donated 28 million premium subscriptions to women in need.
A cornerstone of Flo’s market position is its focus on data stewardship. The company runs a publicly accessible Trust and Safety Centre where users can read about privacy practices, certifications, and data‑governance commitments in plain language. Flo holds dual ISO 27001 and ISO 27701 certifications—information‑security and privacy‑management standards that align with GDPR requirements. According to its privacy portal, Flo is the first and only period‑tracking app to achieve both certifications, and the credentials are independently verified and recertified annually.
Flo’s Anonymous Mode lets users log menstrual, fertility, and pregnancy data without linking personal identifiers to the health information. The feature earned TIME’s Best Invention award in 2023, was a finalist for Fast Company’s World‑Changing Ideas Awards, and won the IAPP Privacy Innovation Award in 2022. The underlying technology uses Oblivious HTTP (OHTTP) and post‑quantum cryptography, a combination Flo developed because existing standards were deemed insufficient for the sensitivity of the data handled.
According to Wikipedia, Flo has faced accusations of sharing users’ sensitive health data with third parties without consent and of misleading users about its data practices. Those allegations have not been confirmed by regulatory authorities or the company itself.
The femtech sector has grown rapidly, and privacy concerns have become a central issue for regulators and consumers alike. GDPR and other data‑protection frameworks have increased scrutiny of health‑related apps. In this context, Flo’s ISO certifications and its public privacy portal are positioned as differentiators that may reassure users and investors.
At present, Flo Health remains the top‑ranked company in the Sifted Consumer 100 list. The company has not announced any new product launches or regulatory actions beyond its existing privacy initiatives. The allegations reported on Wikipedia remain unresolved, and no official investigation or court proceeding has been reported. Flo’s public statements continue to emphasize its commitment to privacy and data security.
The Sifted ranking, announced live at SXSW London, underscores Flo Health’s prominence in the European consumer‑tech landscape and highlights the growing importance of privacy‑focused practices in the femtech industry.
Sifted’s scoring framework blends hard data with expert judgment. Quantitative signals—fundraising history, funding velocity, investor strength, employee growth, and consumer traction—feed into an algorithm, while judges from Sifted’s intelligence and editorial teams, together with SXSW representatives, assess each entrant on three dimensions: reach, habit, and buzz. Reach measures how widely a product is adopted; habit gauges how deeply it is woven into users’ daily lives; buzz captures the cultural conversation surrounding the brand. The final list is intended to spotlight companies that are not only popular but also positioned for cross‑border expansion.
Flo Health is a femtech unicorn, reaching that status in 2024 after a stake purchase by General Atlantic. With 81 million monthly active users worldwide, the app offers cycle and ovulation tracking, fertility and pregnancy guidance, perimenopause symptom monitoring, daily educational content, and a private community. A network of over 100 medical experts supports the platform, and the Pass‑It‑On Project has already donated 28 million premium subscriptions to women in need.
A cornerstone of Flo’s market position is its focus on data stewardship. The company runs a publicly accessible Trust and Safety Centre where users can read about privacy practices, certifications, and data‑governance commitments in plain language. Flo holds dual ISO 27001 and ISO 27701 certifications—information‑security and privacy‑management standards that align with GDPR requirements. According to its privacy portal, Flo is the first and only period‑tracking app to achieve both certifications, and the credentials are independently verified and recertified annually.
Flo’s Anonymous Mode lets users log menstrual, fertility, and pregnancy data without linking personal identifiers to the health information. The feature earned TIME’s Best Invention award in 2023, was a finalist for Fast Company’s World‑Changing Ideas Awards, and won the IAPP Privacy Innovation Award in 2022. The underlying technology uses Oblivious HTTP (OHTTP) and post‑quantum cryptography, a combination Flo developed because existing standards were deemed insufficient for the sensitivity of the data handled.
According to Wikipedia, Flo has faced accusations of sharing users’ sensitive health data with third parties without consent and of misleading users about its data practices. Those allegations have not been confirmed by regulatory authorities or the company itself.
The femtech sector has grown rapidly, and privacy concerns have become a central issue for regulators and consumers alike. GDPR and other data‑protection frameworks have increased scrutiny of health‑related apps. In this context, Flo’s ISO certifications and its public privacy portal are positioned as differentiators that may reassure users and investors.
At present, Flo Health remains the top‑ranked company in the Sifted Consumer 100 list. The company has not announced any new product launches or regulatory actions beyond its existing privacy initiatives. The allegations reported on Wikipedia remain unresolved, and no official investigation or court proceeding has been reported. Flo’s public statements continue to emphasize its commitment to privacy and data security.
The Sifted ranking, announced live at SXSW London, underscores Flo Health’s prominence in the European consumer‑tech landscape and highlights the growing importance of privacy‑focused practices in the femtech industry.
