Name one company that has dominated a market by creating a similar product but with better privacy. Plenty have tried. Protonmail is Gmail with better privacy

Name one company that has dominated a market by creating a similar product but with better privacy. Plenty have tried. Protonmail is Gmail with better privacy, Gmail dominates the market. Telegram / Signal is messaging with better privacy, Slack dominates the market. Zoom dominated the video conferencing market with poor privacy, although they seem to maybe be trying to make it better. Ultimately, "better privacy" does not seem to be a differentiator the market cares about. I would welcome some counter examples though, where a competitor was launched with the differentiator being better privacy and won the market segment.