Am I really anonymous when I post on my company's website? company space?

Yes. No information about the person posting is collected when you post something. There is no way for us or your know who posted what.

How is my company's data secured?

Every item on your space is encrypted. There is no way - even for us - to know what is being said. A user can only can only access their company's space.

How can I contact the Collint team?

You can send a message here: trycollint@outlook.com