All these firms also have back offices in India where you can get some pseudo consulting types work. Moving further down you have players like Renoir Consulting, Avalon Consulting, ECS vying for a piece in consulting pie. Refer to Vault's ratings of top consulting firms. Most of them have India offices. read more
However, if you are looking for a consultant for a large systems integration project, the Big 4 would probably be seen as Tier 1 there, with the big SI companies like Cognizant, etc. as Tier 2., and vendor-owned firms as Tier 3. read more
Strategy Consulting Firms: Main focus is to provide high level strategic advice to companies leadership (C-level and Board). They partake in other things, not limited to, but including implementation, operation etc. read more