Privacy policy
Updated on September 25, 2026.
Who handles the data
Weft Systems, a brand of Lucas Palhares Barbosa, based in São José do Rio Preto (SP), Brazil. Contact for any data matter: contato@weftsystems.com.br.
What we collect
Only what you write or choose: in the contact form, name, email, company (optional), interest and message; in the 30-minute call calendar (the Book a call button), the chosen slot, the name, the email and, if you wish, what you want to solve; in the newsletter and the Academy waitlist, only the email; in the Weft Assistant, the messages of the conversation and, if you use the contact, summary or scheduling cards, the name, WhatsApp number and email you fill in. We also count, without identifying anyone, how many times the assistant and the calendar were opened, how many answers were useful and how many calls were booked.
What for
To reply to your message and, if you wish, prepare a proposal; to book the 30-minute call at the time you chose and send the invitation; for the assistant to answer your questions and, when you ask, pass your case to Lucas, send the conversation summary or book the 30-minute call; to send blog articles and the Academy notice to those who signed up. The email from the form and the assistant is not added to the newsletter. We do not use it for advertising and we do not sell it to anyone.
Legal basis
Your consent, given when you check the box in the form, the calendar, the sign-up or the assistant card, and when you write to the assistant (Brazil's data protection law, LGPD, art. 7, I).
Who we share it with
With the services that make the site, email and assistant work: Vercel (site hosting), Resend (email delivery and the newsletter list), Locaweb (mailbox), Anthropic (the AI model that generates the Weft Assistant's answers), Supabase (database of the contacts you authorized, in the São Paulo region), Cloudflare (anti-bot check on the contact cards and the calendar), Cal.com (calendar for the 30-minute call: it receives the slot, the name and the email and sends the invitation) and Google (Cal.com adds the call to Lucas's Google Calendar and creates the Google Meet link, so Google receives the slot, the name and the email of whoever booked). Vercel, Resend, Anthropic, Cloudflare, Cal.com and Google are in the United States, so the data passes through servers outside Brazil.
Weft Assistant
The assistant's answers are generated by AI and may be wrong: price, deadline and scope are what the proposal says. While you are only chatting, the conversation is not stored on the site: it lives in the open tab and disappears when you close it. To answer, the messages go through Anthropic, which handles them under its own data policy, without using them to train models. During the conversation, a second AI step reads the messages to understand your case (the service you are looking for, the deadline and the budget range you mention); that reading is only stored if you authorize it in the contact, summary or scheduling card. With your authorization, the conversation, your contact details and that reading are stored so Lucas can reply, and he receives an email with the case. Of the questions the assistant cannot answer, we keep only a generic version, without names or personal data, to improve the answers. Do not write sensitive data in the assistant, such as documents or health data.
For how long
Contact through the form, the calendar or the assistant: for up to 12 months after the last contact, or until you ask for deletion. Newsletter and waitlist: until you leave, through the link in every email or by asking by email. Anonymous usage counts: for up to 13 months.
Cookies and data in the browser
The site does not use tracking or advertising cookies. It stores in your browser the theme preference (light or dark), the language choice (a cookie, when you switch languages), the conversation with the assistant while the tab is open and, if you left your contact details through the assistant, your first name, to greet you on a future visit. You can delete all of this by clearing the site data in your browser.
Your rights
You can ask at any time to access, correct or delete your data, or receive a copy of it (portability), and to withdraw your consent. Just write to contato@weftsystems.com.br. The reply arrives within 15 days.