Mainstreet will charge you even if they don't provide services Mainstreet doesn't refund you even if they don't provide their services and hold up to their end of the bargain. This is a scammy business practice -- I'd advise just working with a small business that has sane and customer-centric business practices to get R&D credits filed.

Simply amazing! We are having an amazing experience with Mainstreet. They are exceptional domain experts, provide awesome support and really know what they are doing. We looked at several options but Mainstreet was the obvious choice. They found free money for our start-up and then even advance it at no extra cost. On top of that, you get complete audit protection - it is really a complete no brainer.

Centre Mainstreet Molly, Holly,and Essence were all very kind and professional..They answered all my questions ,and I left there very satisfied with my visit !!! Keep up the good work ladies !! Thank you !

Mainstreet saved our company Mainstreet saved our company. In the middle of the pandemic they were able to give us back 6 months of runway that we otherwise would have never had, and saved 18 jobs. They are the best service I've ever used.

Refuses a refund & continues to charge, even if they don't deliver I filled out Mainstreet.com's intake form and was told that I qualified for 5 figures in tax credits, for which they charge 10%. Great, I thought. My CPA later said that I don't actually qualify, but Mainstreet refuses to refund their fees and wants to continue charging fees until the "end of the contract". This is unbelievably scummy behavior.