The biggest difference is parakeet is trained only for English transcription and Crisper uses Whisper model which supports 90+ languages. This is the first version of Crisper where we have used existing OSS models, but we are in process to fine-tune certain models as per our need.
With first glance what Tirreno does is providing a platform which logs events and detects pre addeded patterns from users. But what we are doing is something on top of this, along with these pattern based detection it proactively helps orgs to stop users from getting into the funnel such that orgs dont get affected by the doings of such fraud actions.