Cryptocurrency is a fast growing industry - with many new defi start-ups popping up every other day!
After blowing onto the scene in August 2018, the defi industry has already amassed a strong following and a value of over $67.65 billion.
Here is a good list of the top 5 defi projects in 2021:
https://4king.com/top-5-defi-projects-0f-2021/I think it is too early to make a list, given the success of Uniswap Balancer and 1inch, it is difficult to find competitors now.