Who is responsible
Halfstack Labs is responsible for this website (halfstacklabs.com) and for the data described on this page. Halfstack Labs is based in Guatemala and is in the process of incorporation. Until that is complete, its founders act as the data controller.
You can reach us at contact@halfstacklabs.com. It is our only contact for privacy questions and requests.
What we collect
The newsletter form sends your email address, through our hosting provider Vercel and without storing it there, to our email provider, Resend, to send you a confirmation link. You are subscribed only after you press Confirm on that link. This is what can be processed:
- Your email address, if you sign up for the newsletter. It is the only data we ask for. Resend keeps a record of the confirmation email, including your address, for up to 30 days, even if you never confirm.
- Analytics and advertising cookies from Google and Meta, only if you accept them. They are listed in the cookies section below.
- Technical data that our hosting provider, Vercel, receives to deliver the site, such as your IP address and the pages you request.
- Your IP address, which reaches Google (i.ytimg.com) when your browser loads video thumbnails in the Latest videos section.
- Your email address and your message, if you write to contact@halfstacklabs.com.
What we use it for
We use your email address to send the confirmation link and, once you confirm, the newsletter. We use it for nothing else. If someone enters your address by mistake, you can ignore the email: you are not subscribed.
Google's analytics cookies measure how the site is used. Meta's cookies measure how our ads perform. Hosting data is used to deliver the site, and the thumbnail requests are how the videos are shown to you.
If you write to us, we use your email address and your message only to reply.
Legal basis
We process your email address and set analytics and advertising cookies only with your consent. You give it for the newsletter by pressing Confirm in the email we send you, and you can withdraw it at any time, as described below.
Hosting data, thumbnail requests and the messages you send us are processed on the basis of our legitimate interest in delivering the site securely and in replying to you.
Who processes your data
These providers process data for us or on the site. Each one follows its own privacy policy:
Resend
Sends the newsletter, the confirmation email, the unsubscribe link and our replies to your emails.
Privacy policyGoogle
Analytics (Google Analytics), video thumbnails (i.ytimg.com) and our inbox (Gmail), where the emails you send us are stored.
Privacy policyMeta
Ad measurement (Meta Pixel).
Privacy policyVercel
Hosting of the website.
Privacy policyCloudflare
Forwards the emails you send to contact@halfstacklabs.com (Email Routing).
Privacy policy
Transfers to the United States
Resend (in its us-east-1 region), Google, Meta, Vercel and Cloudflare process data in the United States. Each one describes the safeguards it uses for international transfers in its own privacy policy.
Email addresses are kept by Resend, not on our own servers.
How long we keep it
- Email address: until you unsubscribe. Resend keeps a record of the confirmation email for up to 30 days, even if you don't confirm.
- Emails you send us: for as long as needed to handle your message. You can ask us to delete them at any time.
- Cookies: for the time shown in the cookie list, or until you delete them.
- Hosting data and thumbnail requests: as set out in the privacy policies of Vercel and Google.
- Your theme, language and cookie choice: they are saved in your browser's local storage, which is not a cookie. They stay on your device, are never sent to us, and last until you clear your browser data.
Unsubscribe and withdraw consent
Every newsletter email will include a link to unsubscribe in one click. You can also write to contact@halfstacklabs.com.
If you accept cookies and later change your mind, choose Reject in "Cookie preferences" in the footer: the cookies listed here are deleted. You can also delete them from your browser settings.
Your rights
You can ask us for a copy of the data we hold about you, or ask us to correct it or delete it, by writing to contact@halfstacklabs.com. You can also file a complaint with the data protection authority in your country.
Children
The site is not directed to children under 16 and we do not knowingly collect their data. If you think a child under 16 has given us an email address, write to contact@halfstacklabs.com and we will delete it.