These are often compared, but they are not really alternatives to each other. Proton Mail is an email service with encryption built in β an account, a mailbox, an address. CrypClip encrypts a single message so you can send it through whatever channel you already use. If you want a private mailbox, you want Proton Mail. If you want to send one encrypted thing through a channel you do not control, that is the gap CrypClip fills.
Different jobs
Proton Mail is a full email provider. You sign up, you get an address, and mail between Proton users is end-to-end encrypted automatically. It also handles contacts, calendar, mobile apps, and everything else a mail service needs to handle. It is a place your mail lives.
CrypClip is not a service and has no account. It takes text, encrypts it in your browser, and hands you back a block of ciphertext. Where that goes is entirely up to you: email, Slack, SMS, a ticket, a printed QR code. It has no idea and no involvement.
So the useful question is not which is more secure. It is whether you need a mailbox or a message.
Side by side
| CrypClip | Proton Mail | |
|---|---|---|
| What it is | A message encryptor | An email service |
| Account required | No | Yes |
| Recipient needs an account | No | No, but E2EE requires extra steps |
| Stores your messages | No β nothing is stored anywhere | Yes, in your encrypted mailbox |
| Works with any channel | Yes | Email only |
| Underlying standard | OpenPGP | OpenPGP |
| Mobile apps | No (works in mobile browsers) | Yes |
| Cost | Free | Free tier and paid plans |
| Ongoing relationship | None | You are a customer |
Proton Mail's features and plans change over time; check their site for current details rather than relying on this table.
When Proton Mail is the right answer
If you want your ordinary, day-to-day email to be private, use an encrypted mail provider. That is the problem it solves and CrypClip does not solve it at all β it has no mailbox, no address, no way to receive anything.
Proton Mail is also better when you want encryption to be automatic rather than deliberate. Between Proton accounts it just happens; there is no password to choose and no second channel to arrange. Automatic protection that people actually get is worth more than manual protection they forget to use.
And it gives you a durable identity β an address people can reach, mail history, search, apps on your phone. CrypClip deliberately has none of that.
When a message encryptor fits better
The channel is not yours to choose
Plenty of communication happens somewhere other than personal email: a work Slack, a customer support ticket, a shared inbox, an SMS. You cannot move those to an encrypted mail provider. You can paste an encrypted block into any of them.
You do not want an account anywhere
Signing up creates a record. CrypClip has no accounts, no database, and no server-side processing, so there is nothing to create a record in. For a one-off, that is a meaningfully smaller footprint than onboarding to a service.
Encryption that does not depend on the recipient's provider
Mail between two Proton users is end-to-end encrypted. Mail from a Proton user to a Gmail user is not, unless extra steps are taken β that is a property of email generally, not a criticism of Proton. An encrypted block is opaque no matter whose mail server carries it.
You want to verify rather than trust
Any hosted service asks for some trust: you cannot inspect what runs on their servers. CrypClip has no servers in the path at all, and you can confirm that in a minute by watching the network tab or pulling the network cable. The code ships unminified so it can be read. Here is how to check.
To be fair on the other side: Proton publishes open-source clients and has been independently audited, which is a stronger form of assurance than "read the source yourself" in most respects. The difference is that with CrypClip there is no server-side component that could behave differently from what is published.
They work fine together
These are not mutually exclusive. Use an encrypted mail provider for your mail, and encrypt individual messages when they are going somewhere else β or when you want a second layer that does not depend on the transport at all.
Both speak OpenPGP, so a message encrypted to a public key in CrypClip can be decrypted by a PGP-capable mail client, and vice versa.
New to this? Start with how to encrypt a message online, or go straight to the tool.