prompter: What are some good, free, software tools for internal corporate communication?

assistant: Here are some free, popular software tools for internal corporate communication:

- Slack: A collaboration and communication platform that offers real-time messaging, file sharing, and integrations with other tools and services.
- Microsoft Teams: A collaboration and communication platform that is part of the Microsoft Office 365 suite, offering messaging, video and audio calls, file sharing, and integration with other Microsoft tools.
- Google Workspace (formerly G Suite): A cloud-based suite of productivity tools that includes Gmail, Google Drive, and Google Meet, as well as other tools for collaboration and communication.
- Mattermost: an open source, self-hosted alternative to Slack that provides team communication, file sharing, and search capabilities
- Rocket.Chat: a self-hosted, open source communication platform that supports voice, video, and text messaging
- Zulip: an open source, real-time group chat platform that offers threaded conversations and integrates with a variety of tools and services
- Matrix: an open standard for decentralized communication that provides a secure, decentralized alternative to proprietary chat platforms
- Riot.im: a free, open source collaboration platform that provides secure, encrypted messaging, voice and video calls, and file sharing.
- Zoom: A cloud-based video conferencing platform that offers audio and video calls, screen sharing, and recording capabilities.

These tools offer a range of features, from basic messaging and file sharing to more advanced collaboration and integration capabilities, so you can choose the one that best fits your company's needs.

prompter: which ones are completely free?

assistant: All of the options I've provided are completely free of use, with the caveat of storage limits, upload limits, or limits on the services.
If you are referring to free as in free and open source, consider using these services:

- Mattermost
- Rocket.Chat
- Zulip
- Matrix
- Riot.im

assistant: Here is the list classifying each between free, cheap, affordable.

Slack
Price:  Slack offers a free version with limited features, as well as paid plans starting at $6.67 per user per month. Affordable.

Microsoft Teams
Price: Microsoft Teams is available as part of Office 365 Business Essentials, which costs $5 per user per month. Affordable.

Google Workspace
Price: Google Workspace starts at $6 per user per month. Affordable.

Mattermost
Price:  Mattermost offers a free version with limited features, as well as paid plans starting at $3 per user per month. Cheap.

Rocket.Chat
Price: 
Rocket.Chat offers a free version with limited features, as well as paid plans starting at $3 per user per month. Cheap.

Zulip
Price:
Zulip offers a free version with limited features, as well as paid plans starting at $4 per user per month. Cheap.

Matrix 
Price: 
Matrix offers a free version with limited features, as well as paid plans starting at $3 per user per month. Cheap.

Riot.im
Price: 
Riot.im offers a free version with limited features, as well as paid plans starting at $2 per user per month. Cheap.

Zoom
Price: 
Zoom offers a free version with limited features, as well as paid plans starting at $14.99 per user per month. Affordable.

assistant: All the tools mentioned above are completely free to use. Slack, Microsoft Teams, Google Workspace (formerly G Suite), Mattermost, Rocket.Chat, Zulip, Matrix, Riot.im, and Zoom are all free to use. 
they may offer paid plans with additional features, but the basic communication features of each platform are free

assistant: It depends on your definition of "free". Some well known open-source approaches are:

Mattermost: An open-source, self-hosted communication platform that offers features such as file sharing, live chat, video calls, and screen sharing.

Jitsi Meet: A free, open-source video conferencing platform offering features like screen sharing, audio and video calls, and file sharing.

It's not free, but typical for a corporate environment are the communication tools from Microsoft O365 and Google Workspaces.

prompter: I think Slack is better option.  It's a cloud-based collaboration tool that offers real-time messaging, file sharing, and video and audio calls. They offer a free version with limited features, as well as paid plans with more advanced features. How about your opinion?

assistant: Discord: a voice video and text communication service - https://discord.com/
matrix: network for secure, decentralized communication - https://matrix.org/
LibreOffice: powerful office suite - https://www.libreoffice.org/
Jitsi: video conferencing app - https://jitsi.org/
drawio: configurable diagramming/whiteboarding visualization - https://github.com/jgraph/drawio

Depending on the nature of your industry, you might also consider collaboration tools such as 
Git: distributed version control system - https://git-scm.com/
Jupyter: interactive computing across all programming languages - https://colab.research.google.com/

prompter: what about a telegram, or email?

assistant: Element is a free and open source client for the messaging protocol Matrix. It can be used for messages and calls.

prompter: What are the alternatives to Element?