Privacy notice
Last updated 23 October 2026. This covers the Mainti website, waitlist and booking tool.
Who we are
Mainti is the controller of the personal data you give us on this site. You can reach us at romwelchh1@gmail.com.
What we collect
If you join the waitlist:
- Your first name and email address.
- Optional details you choose to share: business name, Instagram handle, the services you offer, team size, the tool you use now, and any note you write.
- Whether you'd like to try Mainti early, and where you came from if the link you used included a short source tag.
If you're a pro with a Mainti account: your email, business details, services, hours, team members, clients, bookings and any notes you write about clients.
If you book with a pro through Mainti: your name, email, optional phone number, optional note, the appointment you asked for, and whether you've had a patch test. If you tick the optional box, we also record that you'd like rebooking reminders.
Patch-test information relates to health, which is special category data. It's only used so your pro can keep you safe, and it's shared only with the pro you booked with.
We don't use advertising cookies or tracking on this site.
Who is responsible for what
For waitlist details, Mainti is the controller. For clients' details, the pro you book with decides why and how they're used (they are the controller), and Mainti stores and processes them on the pro's behalf. Pros can see, export and block clients in their own dashboard. To exercise your rights over booking details, you can contact the pro or email us and we'll help.
Why we use it
To run bookings (so the pro and client can arrange, confirm, change and cancel appointments), to send booking emails, and, if you opted in, rebooking reminders. For the waitlist, our legal basis is your consent, which you give by ticking the box. You can withdraw consent at any time, and every rebooking email has a way to stop them.
Who handles it for us
- Supabase stores the data in a database in London.
- Vercel hosts the website.
- Resend delivers our emails.
- Stripe processes payments: pros' subscriptions to Mainti, and clients' deposits, which go to the pro's own Stripe account. Card details are entered on Stripe's pages and never stored by Mainti. Mainti keeps only whether a deposit was paid, the amount, and a payment reference.
How long we keep it
Waitlist details: until you ask us to delete them, or up to 12 months after you join if we haven't been in touch, whichever is sooner. Pros' account data: while the account is open, and deleted on request. Client booking records are kept for as long as the pro keeps them, and can be deleted by the pro or on request.
Your rights
You can ask to see, correct or delete your data, to object to how we use it, or to withdraw consent. Email us and we'll reply within one month. If you're unhappy with how we've handled something, you can complain to the Information Commissioner's Office at ico.org.uk.