Not for everything. You can open a shared wishlist and reserve a gift without signing up. You'll want an account to keep your own wishlists safe, follow people, and change your settings.
What you can do without an account
View a shared wishlist. Anyone with the link can open a wishlist that's Public or Anyone with the link.
Reserve a gift, if the owner allows it. See "How does gift reservation work?".
Start building a wishlist. Visit Wishpicks without signing in and you can create one straight away as a guest.
What needs an account
Following people and seeing their new wishes in your feed.
Collections, saved items, and your settings.
Keeping your wishlists for the long term. More on that below.
How to sign in
Wishpicks signs you in with Google, Facebook, or an emailed magic link, a one-time link that signs you in when you click it. There's no email-and-password login, and signing in with Apple isn't available yet.
Good to know
Guest work can be lost. A guest wishlist lives in your browser, so switching devices, clearing your cookies, or leaving it a long while can lock you out. Signing up in that same browser is the safe route: the wishlists and reservations you made as a guest move into your new account by themselves. You can also set up a recovery link beforehand, but that only rescues a guest wishlist, never a reservation.
The magic link is your sign-in. It arrives by email and expires after about an hour. If it doesn't turn up, check your spam folder.