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 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 costs when necessary.
Whenever you submit a general-purpose search request, then we will forward your request to Bing's and Wikipedia's API. This means that if 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.
We do however store Bing's response in a Cloudflare Worker KV store in order to offset the costs of Bing's API. For the key-value key we use the MD5 hash of the raw query. For instance, if you search for "bill gates" then this raw query will become "count=50&mkt=en-US&q=bill+gates&safeSearch=moderate&setLang=en", which has the MD5 hash "b20d6845b847f44ecd03aa17f769d3e9". The key-value value consist of parts of Bing's API response (just the data we need to display the results on our website). We are not able to tell who searched for what, when a specific query was made, or how many times people searched for a specific query.