Proton save up 60% (new users)
If you already have Proton, go to your account and click the “special offer” tab.
Simplelogin Yearly plan is 33% off on the first year($20 instead of $30) with the discount code BF2023
Please note, if you have Proton ultimate this is included.
Skiff Get off 15% off all annual plans https://app.skiff.com/mail?settingTab=plans
Mountain Duck If you using cryptomator, you might check out this software. $7.50 instead of $39 is a steal. https://bundlehunt.com/bundle/2023-blackfriday-macos-bundle
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Just good information to know
I guess you can called a promotion since its related to Black Friday. There are no affiliate links.