The best alternatives to Portal are Firefox Send, Vaultedge, and Tresorit. If these 3 options don't work for you, we've listed a few more alternatives below.
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Tresorit is an online cloud storage service based in Switzerland and Hungary that emphasizes enhanced security and data encryption for Businesses and individuals/freelancers. ... Tresorit has been likened to a high-security alternative to Dropbox.
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