Depends on whether you trust your ISP's DNS more than Cloudflare's. According to https://www.cloudflare.com/en-gb/learning/dns/what-is-1.1.1.1/ https://www.clo

Depends on whether you trust your ISP's DNS more than Cloudflare's. According to https://www.cloudflare.com/en-gb/learning/dns/what-is-1.1.1.1/ https://www.cloudflare.com/en-gb/learning/dns/what-is-1.1.1....: > Unlike most DNS resolvers, 1.1.1.1 does not sell user data to advertisers. Putting aside the question of whether they actually honour that commitment, has your ISP even published a similar statement to put their reputation on the line? I think Cloudflare's commitment is plausible. They have a financial incentive to maintain their free DNS resolver's reputation and popularity, because they are selling points for their commercial authoritative DNS service; https://www.cloudflare.com/en-gb/dns/ https://www.cloudflare.com/en-gb/dns/. Does your ISP have a similar financial incentive to behave? "If it's free, you are the product" is not always true. Sometimes, if it's free, you are the marketing funnel.