I tried Kagi in late May with the three-month free trial of professional plan from the perk provided by one of the services I am using.
Bear in mind they never promote themselves as “privacy-oriented”, although they have many privacy features like zero telemetry, and Privacy Pass with the related policies of like no collection of users’ search history.
As discussed above, their selling points are “ad-free” with the framing of something like “customers no longer become the products by paying”.
If you think they are privacy-oriented, it’s because they are better than Google. However they are far from competitors like Brave, Firefox and Mullvad (don’t be serious about my examples if you disagree). Login needed, compatibility with Firefox/Chrome extension support which can lead to privacy/security issues if you use their Orion Browser?
At least they are honest about their views of privacy, like it or not. So you better don’t expect they will improve their privacy.
Another aspect to determine if they are private is that they are like Proton creating an ecosystem which has had translations, news, summary, assistant, maps and even mail which is ongoing. This will create “shifting trust” and “everything into one basket” issues.
Off topic (I posted here as this can relate the thinking of privacy. If admins find it inappropriate to be shown here, you can delete the following):
They are fixing the “broken web” they claimed by building another kingdom of web. People appreciate they are creating the good old days of Google, but fail to think if they are going to become another Google. They think paying can avoid becoming products, but fail to see ad-supported companies like Meta and Google having subscriptions as well and they can get both (money from advertisers and users) too. I won’t trust a company simply running their business model by asking users to pay, because I saw a lot of companies just keeping raising their prices and even introducing ads. Apple, which at the beginning relied on hardware sales, introduced subscriptions for services, and they now have ads on Apple News (even in subscriptions) and soon on Maps. I can’t see what can guarantee Kagi to only accept users’ payments in the long run. There is nothing to appreciate Public Benefits Corporation as it can be removed anytime as you can see the case of Twitter.
If you simply use it because the products are great, enjoy it. If you want to have a trustworthy (not evil) and privacy-oriented tools, it’s not for you.