I don't think you could anonymize chat messages with any level of confidence. Not an expert in this but my team generally has to treat free-text fields at the h

I don't think you could anonymize chat messages with any level of confidence. Not an expert in this but my team generally has to treat free-text fields at the highest level of data classification because they could contain anything. The best you could do is try to mask obvious PII like phone number patterns but that's definitely not sufficient.