It's not an open source, but free up to 10k pages per month. And it can handle modern JS web applications (your code runs in a context of crawled page). You can for example scrape API key at first and then use internal AJAX calls.
There's also a community page [2] where you can find and use crawlers made by other users.
[1] https://www.apifier.com [2] https://www.apifier.com/community/crawlers
Typical use is an aggregator that needs common API for all partners who are not able to provide it. So they have running API on Apifier in an hour. It might break once in a while - than you have to update your crawler (not that often if you use internal AJAX calls).
I feel like it's a hard sell to enterprises. Scraping is viewed inferior to an API so it makes sense for enterprises to just pay the target website for access to the data.
But you're right it's a hard sell to enterprises although we have some (e.g. real estate developer creating pricing maps)