ProtonMail is a good app but do you have any idea how such an app was developed? No worries I have one article where each and every point explained about How to Create an Application? https://www.techavidus.com/blogs/how-to-create-an-application

The ability to start a secure group chat from within the email client. Include burn features and message TTL features.

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Sounds great !

I use Signal for secure messaging
or MSFT 365 Teams for business

Hi! This is a very interesting idea! But what about https://computools.com/software-development-life-cycle-sdlc/? Building such an application is not an easy task.

I want a messenger function with privacy

The amazing free messaging app Yowhatsapp is very popular. Download at the link https://coimobile.com/yowhatsapp/

It should be like a combination of Signal and Twitter.

I suggest you to create a end-to-end encrypted messaging app like signal.
I am a fan for proton services so i suggest you to create a messaging app.

A secure Instant Messanger that actually won't sell us out

Proton to Proton secure messenger - obviously - right ?!

What about setting up a Matrix server for Protonmail users?

- Secure messaging protocol
- Does not reinvent the wheel because it would use an existing protocol
- Does not set up a new walled garden of messaging but still...
- Allows Protonmail to brand its own messaging service

Create a chat system so any body with protonmail can chat like google chat so I don't have to send a whole e-mail

that's a really good idea, but it should be added to then loging of protonmail. it could be attached to an email or to an sidebar. no additional app.

I honestly think this is a great idea, because I have a business called Homestead Movies and we used Hangouts for our Business texting service. Then we found out about Protonmail, and we are currently switching over to it! But we still go back to Gmail and use Hangouts which is very confusing, because obviously if you have two email services that you are using it is hard to find things and keep everything organized and in one spot. That is why I think that making a ProtonChat would be a great idea!

I'd vote this one down. There are plenty of other good security focused message apps like Telegram and Signal to name a few. Continue to focus on Mail, Contacts, and Calendar and maybe build integration with other message apps if possible.

create a messaging app using E2EE, but can be use for business purposes. Like whatsapp business, but Protonmail style

Add inter-organizational coordination functions similar to what Microsoft Teams and Slack offer with the option to creat “teams” with channels for streamlined communications. This added feature would undoubtedly attract organizations that currently rely on a combination of G-suite and Microsoft Teams to effectively collaborate.

We use ProtonMail at work and it would be nice to be able to use a service that is already downloaded on our computers to send in office instant messages. I mean it’s fine to text but it’s very unprofessional to use a phone while a patient is in the office and we can’t send patient info via texting. ProtonMail is perfect for protected info and I just wish it had the option of instant messaging.