In my experience, you should follow up 4-5 times. In many instances, we receive positive responses much later in the follow-up cycle. For context: Selling to 100-plus-person SaaS B2B organisations.
Have you thought about how your solution differs to Appcues and Intercom Tours? Just curious, as my team tried to build a solution like this but struggled to differentiate in the noisy space that is visual onboarding tools