CC, I'm able to go to HealthCare.gov and get basic individual quotes for non-smoker plans, but for the Small Business plans you still have to contact an Agent or Broker (who will likely end up trying to sell you something else anyway, depending on the demographics of your employees).
Personal anecdote: my current group plan for my employees is significantly cheaper than a Small Business plan through the ACA.
For individual plans, I compare against Gold plans, since that's the equivalent of what I offer my employees. The Cheapest ACA Gold plan (who happens to be Humana just like our group plan) is about 50% more for a 34-year old non-smoker (me) that my group plan. Even the ACA Bronze and Silver plans are more than my group plan.
On the other hand, I was looking at ACA for my mom, 59-year old with a pre-existing condition. I can get an ACA-Platinum zero-deductible plan for the same price as what we pay for her COBRA (recent disability retirement) group insurance which is the equivalent of a top Gold plan. She's already met her out-of-pocket maximums for the year (which starts in Sept) so we'll stick with that plan until renewal and then probably switch to that ACA Platinum plan.
This is all anecdotal and your mileage may vary, but hopefully these examples are helpful.