Jives good to great with Indeed (although Indeed itself has died out with number of jobs available to me), LinkedIn, and simplyHired. Works pretty good with Careerbuilder but that stalled out for me.
Glassdoor and ZipRecruiter integrations have been nightmarish. Glassdoor currently has issues with actually hitting the Easy Apply button, but if you sorta babysit it and let the automation work its not bad as long as you are ok with hit the Easy Apply button yourself, rinse wash and repeat, it can work. ZipRecruiter applications on the other hand have bad mapping, with one question per page and will every now and then tell the employer I required sponsorship
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The Chrome extension for manual applications is a bit janky (you'll have to review some of the input fields yourself, especially address fields) but its actually a pretty big time saver
I avoid Dice, I aint trying to get Nap'd to death