Carrd is a hosted website builder for one-page sites, made by Carrd Inc. A one-page site puts all of its content on a single page, for example a personal profile or a landing page that collects email addresses.
A user starts from one of dozens of templates or from a blank page, edits it in the browser and publishes it; the layout adapts to phones, tablets and desktops. Pro plans add custom domains with SSL certificates from Let's Encrypt; forms for contact, signup, custom data and payments, which can send signups to email services such as Mailchimp, Kit or ActiveCampaign; embedded code and widgets from Stripe, PayPal, Gumroad or Typeform; site analytics; and removal of the 'Made with Carrd' branding.
A free account can build up to three sites with all core features. Pro plans are paid per year, with a 7-day free trial, and they differ in the number of sites and in features such as forms and custom domains.