The best alternatives to Secure Send for Slack are kifi, Obie, and Pingpad for Slack. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Obie is the fastest and easiest way for you to build an internal knowledge base at work. Securely connect knowledge and documents that you already have into one searchable, intelligent, single source of truth.
Need to send something to someone? (I know, vague right). Send up to 3gb for free to anyone at anytime, as many times as you like. Just upload your files, tell us who to send it to and we'll shoot them through a link. It's pretty simple.
Fastgrep is an app built for Slack that helps teams more easily find and organize links and files shared by their team members across their workspaces. All you need to do is add Fastgrep to Slack and it will start listening to all links and files that you and your teammates share. Then simply type /links or /files and voilà!