Keybase vs Rethink

Completely end-to-end encrypted.

Users can publish proofs of identity (PGP public key, Twitter, Facebook, etc).

Free (as in beer) and Open Source Software.

Securely share files.

For sharing files publicly.

250GB of free storage for encrypted files in a team.

Teams can be public with open access or admin-approved access. Opt-in to list public teams.

Teams can be completely private (access granted via admin-approval only, not publicly listed).

Encrypted private or team Git repositories with automatic commit signatures.

Based on blockchain technology.

View/verify the cryptographic signature history of any user.

Encrypt/decrypt any PGP message or file with minimal effort.

Supports public key encryption.

Securely store personal files that only you can access.

Share files securely and privately with other users, a group of users, or a team.

250GB of free storage for privately-encrypted files.

Host a public static website for free. Sites are automatically viewable via keybase.pub if an index.html or index.md exist in your public files.

Teams are E2E encrypted, unlike Slack and other services.

for example If you want to view video just click and see the online video start on rethinks player

If you want to download for example 100 mb file from google drive to your rethink account for example any confidental data that delete in future.
1.just click on create icon on rethink
2.click on download url

3. enter url of your file and give its name.
4. click download and save buttom.
   After few minutes you see your files are downloaded by rethink cloud without using 1 mb of your data and then download it anytime.

Just go and enable it from settings if you don't trust anyone and want extra security

I personally use it in uploading file and transfer from other clouds it is so fast.
for example if you transfer (it just copy it not delete original one) any 1GB or 2GB file from pcloud to rethink it take about 1 minute.

It integrates with
box
google drive
onedrive
outlook
zoho
dropbox
pcloud and more.
you can see on their site
Just integrate by sign up on that account of that site then transfer files or make link of your data from that cloud to rethink that's your choice.

Rethink have referral like this
1st friend=3 GB
3rd friends =5GB extra (total 8GB)
5th friends=10GB extra (total 18 GB)
....
total 100th friends=1 TBextra (total you calculate like above)

if you are referred by your friend then you and your friend both get additional 2GB storage
if you don't have friend then you sign up with my referral,
https://rethink.software/signup?referrerId=c1rr5a0wlrpzdiz42m2ar

OR other option is to pay for extra storage