Privacy notice

Who we are

Marquedata is a data and AI engineering company based in Kolkata, India. Contact: [email protected].

What we collect

Information you send us

If you use the contact form or email us, we receive the details you provide (such as your name, email address, company and message). We store them in our database (Supabase, hosted in Japan) and receive an email alert through our email provider, Resend. We use them only to reply to you, follow up on your enquiry and keep a record of the conversation, and keep them for up to 24 months unless the enquiry leads to a working relationship. To slow down spam we keep a one-way code derived from your IP address that changes every day; the address itself is never stored.

Blog accounts, posts and comments

You can read the blog without an account. To write a post or comment you sign in with Google, GitHub, Microsoft or Meta. The sign-in provider shares with us your name, email address and profile picture; we never receive your password. We store this, together with the posts and comments you submit, with our database and authentication provider, Supabase.

Your display name and profile picture are shown publicly next to posts and comments you publish. Your email address is never shown publicly.
Posts are reviewed by our editors before they are published. Comments that contain links are held for moderation. We may remove content that breaks the law or is abusive or spam.
Signing in sets a session cookie that keeps you signed in. It is strictly necessary for the sign-in to work and is not used for tracking.
If you sign up with email, we send a verification link to confirm the address belongs to you. Your password is stored only as a salted hash by our authentication provider.
To delete your account, posts or comments, email us at the address above.

We only add your email address to our newsletter list if you tick the optional box at signup or switch it on in your account (“My posts” page), and then confirm by clicking the link in the email we send you (double opt-in). Unconfirmed requests receive no newsletters. We record when you opted in, when you confirmed and the wording you agreed to, as proof of your consent. We use your name and email solely to send Marquedata articles and updates, and every email includes an unsubscribe link. You can also unsubscribe on the account page or by emailing [email protected]. The list is stored in our database and, when we start sending, shared with the email-delivery provider we use. Signing up for an account never subscribes you automatically.

Visit statistics

We measure how the site is used so we can improve it: which pages are viewed, where visitors come from (for example a search engine), and broad device and country information. Our hosting provider also keeps standard server logs (such as IP address, pages requested and browser type) for security and to count visits.

Google Analytics (optional)

We use Google Analytics 4 to understand visits in more detail. Its cookies are set only if you choose “Accept analytics” in the banner. You can change your choice at any time using “Cookie settings” in the page footer.

If you are in the EU, the EEA, the UK or Switzerland (or we cannot tell where you are), Google Analytics does not load at all unless you accept. Elsewhere, before you choose or if you decline, it may send Google anonymous, cookieless signals (for example, that a page was viewed, with your browser type and approximate region). These contain no cookies or identifiers and are used only for aggregate, modelled traffic statistics. We determine your region from the country our CDN, Cloudflare, detects for each request; we do not store it. Google Analytics advertising features (Google Signals and ad personalisation) are switched off.

Theme preference

If you switch between the light and dark theme, your choice is saved in your browser (local storage) so the site remembers it. It is not sent to us.

Server logs and security

Our web server and our CDN and security provider, Cloudflare, process technical data such as IP addresses and requested pages to deliver the site, prevent abuse and produce traffic reports. Server logs, including IP addresses, are kept for up to 30 days and then deleted.

Sharing

We do not sell personal data. Data is shared only with the service providers that run the site and its features (hosting, Cloudflare, Supabase, Resend for email alerts, the sign-in providers you choose, and analytics as described above).

Your choices and rights

You may ask us to access, correct or delete the personal data we hold about you, or withdraw consent you have given, by emailing [email protected].

Changes

We may update this notice as the site evolves; the date above shows the latest version.