Indigo’s quasi-business class product called Stretch, available on their A321neos. For domestic flights, this comes with a nice 2-2 recliner seat, extra baggage allowance, priority boarding and a cold snack box. No lounge access or priority baggage tags.
For a third of the cost of a standard J class in Air India, I was quite impressed. The snack box meal was tiny but very well done. Not bad for a LCC premium product.