This is the killer feature. You don’t need to hand over your email, phone number, or create yet another password. Generate a link or a short code, share it, and the file is sent directly. FileSlack offers optional end-to-end encryption, so even they can’t see what you’re sending.
You can send files up to 10GB for free, with no daily caps that kneecap you after one transfer. For freelancers and small teams, that’s genuinely usable without paying a cent.
It won’t replace Dropbox for team collaboration, but for ad-hoc, secure, high-speed transfers, it’s currently the best tool in its class. The lack of a mobile app stings a little, but the desktop and web experience are so solid that it’s easy to overlook.