Privacy
Last updated 1 November 2026
- There is no sign-up. We don't know who you are.
- Your files are compared in the server's memory only. They are never written to disk and are deleted within 30 minutes.
- No AI service sees your files, and they are never used to train anything.
- No cookies and no tracking scripts. Our server records anonymous usage events, such as "two lists were compared, 12 rows changed", to learn what to improve.
- If you leave feedback, your comment and (only if you give it) your email are kept so we can read them and reply.
Who we are
Qaren is a free tool made by AnaFiles, the team behind Mutabaqa, Naqqi and Sorites. Questions or requests: support@anafiles.com.
Your files
The files you upload are read, compared and turned into the page you see and the file you download. That is all they are used for. They are kept in the server's memory, never on disk, and deleted 30 minutes after upload at the latest (often sooner, when the server needs the room). Our logs never contain anything from your files.
Lists often name customers, suppliers, employees or other people. You decide what to upload, and you should only upload data you are allowed to use. We process it only on your behalf, to compare it for you.
What else we process
- Your network address (IP). Held in memory for at most 24 hours, only to limit how often one visitor can use the tool, so it stays free for everyone. It is not written down or logged.
- Anonymous usage events. Our server records the steps of a visit (page opened, files read, lists compared, file downloaded) with facts about them: the page language, the referring website's name and campaign tags (for example "linkedin.com"), the country (looked up from your network address on our server; the address itself is not passed on), the type of device, browser and operating system, the file format, the size range and header language of the lists, how many keys were found in both, how many columns were paired, how many rows were the same, changed, new, removed or duplicated, which options you changed and which tabs you opened. Nothing from inside your files is included: no names, descriptions, amounts or dates. The steps of one visit are linked by a random code that lives only in your open browser tab and is gone when you close it.
- Where the events go. We use PostHog (PostHog Inc.) to store and chart these events, in its European Union region (Frankfurt). PostHog does not receive your network address and sets nothing in your browser.
- Feedback. If you answer "Was this useful?", we keep your answer, your comment and, only if you type it, your email address, on our server. We use the email only to tell you about Qaren (new features or paid plans) and to reply to your comment. Every message lets you stop them, and you can ask us to delete your feedback at any time.
Your browser
The page stores a few small things in your browser: your language choice, a "been here before" flag, the random code for the current tab (removed when the tab closes), and a short history: the day of your first visit, how many comparisons you have run, and the day of the last one. The history stays in your browser; usage events only carry rough ranges from it (for example "2 to 5 comparisons before, the last one within a month"), never the dates or a code that follows you from one visit to the next. None of this identifies you, and clearing your browser's site data removes it. There are no cookies, so there is no cookie banner. Fonts are served from our own server.
Where
The service runs on a server in the United Kingdom, operated for AnaFiles by our hosting provider, IONOS. Usage events are stored by PostHog in the European Union.
Country lookup: IP Geolocation by DB-IP, licensed under CC BY 4.0.
Your rights
Apart from feedback you choose to send, we hold no personal data about you beyond the short-lived items above, and nothing we could look up by your name. If you have a question or a request, email support@anafiles.com and we will reply within 30 days. You can also complain to your data protection authority.
Changes
If we change this page, we update the date above. If we ever add accounts or paid plans, we will say so on the home page first.