We actually care about user privacy, which is why you will never see a cookie overlay on our website.
Analytics and logs
We try to log as little information as possible. For instance, we do not log any requests on our server, and we do not use analytical tools, not even self-hosted ones. We do however use Cloudflare, and Cloudflare log and store number of request and unique visitor count for 30 days. We also store the results of search requests in Cloudflare's KV store in order to offset the costs of Bing's API.
We want to make it clear that we have no interest in analytical data, and we try to store as little as possible. However, we will not go out of our way to self-host everything, and we have chosen to cache some data to offset the cost of expensive API's.
Whenever you submit a search request, then we will forward your request to Bing's and Wikipedia's API. This means that when you search for "Tiananmen Square Massacre" then Microsoft will know somebody using Ask.Moe's API key searched for "Tiananmen Square Massacre" at the time you submitted the request. However, Microsoft et al. won't know who submitted the query, because all queries from all users are submitted using Ask.Moe's server IP. Moreover, we do not forward any informaiton related to you (such as your IP, user agent, etc.) when we proxy your search query - we only forward the query string itself.