WebMail Lite VS ProtonMail Web Client

There's also Afterlogic, it was good a couple years ago, but their free version is pretty limited.

The source code is here https://github.com/ProtonMail/WebClients

> Finally, in keeping with our long track record of transparency, Proton Pass is open source so anyone can review and verify our security architecture

They sure do enjoy writing that sentence without including any hyperlinks. This (https://github.com/ProtonMail/WebClients/tree/main/applicati...) appears to be the browser extension and https://github.com/ProtonMail/WebClients/tree/main/packages/... appears to look like the backend referenced in the extension's readme, but that directory's readme is zero bytes so (shrug)

Fork the frontend and make your own lightweight option

PS: I hope that we selfhosters will have a modern, efficient, easy to use mail suite one day with modern features like JMAP, good self-learning spam integration, automated checks and validations for SPF/DMARC/DKIM or whether the IP/host suddenly appears in a blocklist and integrated encryption at rest for emails. Something that isn't 30 services in a container image, with 30 different configuration styles. Maybe even with an API integrated that's compatible to the ProtonMail frontend (like the neutron server once intended to be). Anyway, I'm sorry for dreaming. ;)

And if you want to customize it further you can use Stylus to add custom CSS, Tampermonkey to add JS, or even modify the whole thing yourself from source (if you run it locally it syncs with your actual account).

There are lots of useful End to end encrypted webapps such as Protonmail, cryptpad, cryptee and many others. And part of why we trust them is that the client side code is open source, so we can see that end to end encryption is really going on and is really secure. Its impossible to verify what code they are running in their server, but if the data we send them is already encrypted we can rest easy.