Arweave (permanent information storage on decentralized web)

Boxcryptor

Cryptomator

Dynascale (Purchased by social media site, Parler.)

Helm (This is a unique alternative to the cloud.  You purchase your own personal server that lets you have your own private, secure, encrypted email, contacts, calendar, and files without relying on various other web companies.  With your own server box, you will be protected from surveillance, corporate oversight, and data breaches.)

iDox.ai

Icedrive

Joplin Cloud (Joplin notes work with this.)

MEGA

Nextcloud

Nordlocker

Our Freedom Files (by Our Freedom Media Group)

ownCloud

pCloud Crypto

Proton Drive (powered by Proton who also have Proton Pass, Protonmail, Protonmail Bridge, Proton Calendar, ProtonVPN, and SimpleLogin.)

Rocket Tech Tahoe (Rocket Tech is a Christian, conservative company that offers a number of services besides this one.; “Tahoe-LAFS is a secure, decentralized, fault-tolerant, distributed data store and distributed file system first released in 2007.”)

Rumble Cloud (Created by the Rumble social media app.  They also have Rumble Player.)

SpiderOak

Sync.com

Tresorit