Add or change a live URL and SerpCrest opens that page straight away to look for your link.
Whether your link is on the page, whether it is followed or nofollow, whether your anchor text is there, and whether it reaches you through an old domain that now redirects.
Project links are checked again every week. A link that goes missing gets a second look a few hours later before you hear about it, so one slow page load doesn't set off an alert.
The Backlink Monitor takes the sheet you track links in today, as .xlsx or CSV, and checks every row on a schedule you pick, from daily to monthly. You get a notification when a link is confirmed lost. Passwords, keys and payment details are stripped from the file before anything is saved, and emails, usernames and phone numbers are removed too unless you choose to keep them.
Free tools that do one part of the job on their own.
The backlink directory lists sites to get links from, sorted by type and checked every week. Anything you find there goes into a project in one click.