Nowadays, using WordPress may sound a little old-school, but I love how it has nearly limitless features thanks to its vast plugin marketplace.
I use the Divi theme, which is also highly customizable.
I'm using Unbounce because I already had an account, but I regret it. Seems like Carrd and Webflow are popular among the Indie Hacker community. Will definitely be switching over.
We use Webflow. It's got a bit of a learning curve but is incredibly powerful.
I'm so glad we took the decision to use (and pay!) a page builder as opposed to coding our own landing page 😅. So much time and frustration saved in the end.