[1] https://www.statista.com/statistics/274823/ibms-global-reven...
[1] https://www.statista.com/statistics/274823/ibms-global-reven...
Accenture, Deloitte & IBM are considered Tier 2. The BMW, Mercedes, Audi if you will.
McKinsey, Bain, BCG are Tier 1. The Lamborghini, Ferrari, Aston Martin, etc.
Tier 2 do their darndest to get into Tier 1 but the nature of the work is very different and the chasm between tiers is hard to cross just like in the car industry. Source: I've done extensive work in both tiers.
In this case, the smaller companies are, if anything, slightly higher-end (more boutique).
I'm not actually sure the Tier 2 are trying to become Tier 1. It's like comparing Walmart to Tiffany & Co. They're very different business models, but upscale doesn't necessarily beat mass market.
What about EPAM Systems btw?
My experience is the Tier 2 vendors you've listed are more tactical, and typically handle execution (outsourcing etc.).
Whereas MBB are more strategic, C-Suite, but the value-add may or may not be significantly different from the former.
Edit: I was confused by this:
https://www.ibm.com/cloud/architecture/architectures/ibm-clo...
The most basic googling will show this is a lie.
IBM cloud has nothing to do with AWS or any other provider. It is an autonomous provider just like AWS, Azure, Google, Alibaba, etc
Disclaimer: Close friend works there.
Jesus, get your facts straight before shooting such inaccuracies.