Apps to aggregate iPhone Text messages for SEC compliance

Hey Guys, We have some clients that are wealth management companies. I am looking for an app to cover the SEC regulations for capturing text messages used for business communications. Currently we have Meraki MDM and devices setup with icloud to log their messages, but that doesn't prevent someone from deleting them. Ideally we would like an app that can aggregate all the text messages into something that would be easy to search incase the SEC comes knocking. The only apps i'm finding online are just parental control apps, and I'm not sure those are designed with this scenario in mind. Anyone have anything that will work for this?