Is it possible to make email group can have a encrypted chat room to talk to each other?

Unrelated? perhaps at the moment. but consider a future ideal situation where your PCal automated x via a secure (non u s) PM messenger

At the Moment we are using Signal or whatsapp .. but it is possible instead to have a chat feature built into protonmail or protonmail app? So all work communications are in one place and secure?

Absolutely, Would switch to this ProtonIM instantly. As it's turned out to be quite difficult to know which of the alternatives you can really trust or not.

Would actually prefer to see this as a separate product. A signal or telegraph alternative that is linked to our proton accounts and products

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.

Check it out....Sekur.com in Switzerland.
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No Phone Number Mining
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Self-Destruct Timer on All Messages
Unlimited Encrypted Messages
Unlimited Voice Recording Messages
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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.