From End Citizens United:

New Q4 reports show that candidates who refuse to take corporate PAC money continue to have widespread success. Democratic Frontline candidates (those defending competitive seats), for the third consecutive year, on average outraised their Frontline counterparts who do not refuse corporate PAC donations.

2021 Average raised: 

• • Frontline no corporate PAC candidates: $3,323,823
  • Frontline non-no corporate candidates: $2,666,424

Find out more here.