What's my alternatives to Unbounce for idea validation

Carrd is good and cheap.

If the idea is for a SaaS/Startup and you need something with polish but still fast to ship try https://versoly.com/ (founder here)

Comes with a bunch of pre-built components and templates, easily customise colors/fonts and has forms to collect emails.

If you're looking for alternatives to Unbounce for idea validation, there are a few options that you can consider.

Instapage: This is a popular landing page builder that offers a range of features for building and testing landing pages. It has a drag-and-drop interface, A/B testing capabilities, and integrations with popular marketing tools like Google Analytics and Salesforce.

Leadpages: This is another landing page builder that offers a variety of templates and integrations. It has a user-friendly interface and A/B testing capabilities, as well as options for creating pop-ups and opt-in forms.

ClickFunnels: This is a comprehensive sales funnel builder that can be used to create landing pages, lead magnets, and email sequences. It's a bit more expensive than some other options, but it offers a wide range of features and integrations.

Carrd: This is a simple, inexpensive landing page builder that is great for creating quick, one-page sites. It's not as robust as some of the other options, but it's a good choice if you just need a basic landing page to test your idea.