How many images can I process for free?
Unlimited. bgclear has no daily cap, no credits and no watermark on the website, and you do not need an account. Process as many images as you like, one after another. Only the developer API is metered, because it serves software rather than people.
Most competing tools give one or two free images a day, or a free preview and a paid HD download. bgclear's web tool has neither limit: the full-resolution PNG is free on image one and image five thousand.
If you are processing hundreds of images a day from a script or an app, that is what the API is for — preview-size results are free there too, and full-resolution results cost one credit each with no subscription.