Ask HN: Which proprietary SaaS can be replaced with FOSS cron jobs?

The classic dropbox -> rsync, of course.

Not a cron job per se... But people overlook Redmine as a fantastic alternative to project management systems like Asana or bug trackers like Jira.

I think a lot of popular services are just enhancements to open source tools like git, selenium, elasticsearch, etc.

But to answer your question selenium/puppeteer looks like a good tool for automatic website monitoring and testing.

Running Puppeteer for monitoring is 50% of the SaaS I run. You can totally run it in a cronjob. Getting it to behave predictably and consistently and delivering actionable results is a different thing though.

Yes I think browserless.io is a very good site if you want to avoid those headaches with puppeteer.

But it may dilute your profits though since you'll need to buy a commercial license for it even though the project itself is open source. Depends on the money vs time you want to invest in doing it.

maybe https://cronhooks.io ?