You can integrate your Unbounce page with a ConvertKit Form via Webhooks. Here's how!
Go to your Page Overview Screen. This is not your Page Editor, it looks like this:
Scroll to the "Basic Integrations" box and click "WebHook: POST to URL."
In your ConvertKit account, open up the Form you want to connect to Unbounce. Go to Settings > Form Integrations tab. Select "Unbounce."
This is the POST URL you need to copy from ConvertKit into Unbounce. Paste & Save.
Unbounce will automatically check that the webhook is working properly, and then display a success message.
And you are all set! Your Unbounce landing page is now connected to your ConvertKit Form!