K7 is one of very very few indian vendors that have & use their own technologies, own threat lab (HQ @ Chennai) , excellent R&D, own engine & good signatures. Cons do exist, but overall would be great to use >>>>> Quick heal.
Escan use their own technologies, along side Bitdefender. Major (almost)static detections come from BD. Proactive engines are built upon their inhouse tech. However I suspect (does use Bitdefender behavior engine along side it's own + inhouse ransomware remediation engine) * . Protection is TOP NOTCH. >> K7
Quickheal : Their TS version is a Bitdefender remapped. Their other AV versions use own engine ( lot weaker in signatures), their inhouse BB does a lot, a of lot heavy duty. I do suspect their products also use Bitdefender BB alongside their own << K7<<Escan