Hi
i propose to use facebook api, no need for specialized software only python script will do. The program will sense your comments through facebook API, the script then will automatically send private message to your clients, facebook has a messenger api that my script will connect to to create messages in your behalf, this api is safe and only authenticated by you, so you if run the script you just insert
your authentication password, i dont need to know and you should not give it to someone, so it is safe.
I am an expert python full stack web developer for more than 3 years now. I can do this job on before the 15th of march or 3days after approval.
Please PM for more info.
Thank you so much