All ProtonMail accounts are started on the Free plan by default. This plan provides email accounts with 500 MB of encrypted storage. Unlike many other free email services, ProtonMail does not harvest our users data to generate revenue by showing advertisements to ProtonMail users. In the lower left hand corner of your account, you can find your existing storage allotment along with your current storage usage.
ProtonMail offers 2 different premium plans which allow you to increase your storage capacity if needed.
Within ProtonMail Plus, you will receive 5 GB of storage by default. You can increase this amount by selecting the drop down and selecting the desired storage amount. As you change the storage capacity, you will see the pricing change to reflect the increased/decreased storage capacity.
The ProtonMail Visionary plan offers the maximum 20 GB of storage for all users that upgrade to this plan.
If you are in need of additional storage over the 20 GB maximum, please contact us.