MainStreet
“Can a tax-credit automation platform become the financial operating layer that systematically unlocks government money for startups and SMBs?”
Founded2019
HQSan Jose, California, USA
Latest roundSeries B
Valuation$440M pre-money (Series A, 2021)
IndustryFintech / SMB banking
The story
MainStreet was founded in 2019 in San Jose, California, as a platform focused on helping startups and small businesses discover and claim tax credits (notably R&D credits) and government incentives. The company raised a Series A in 2021 led by SignalFire at a $440M pre-money valuation and has since grown to 101-250 employees. The embedded finance angle centers on integrating with payroll/HRIS systems (via Finch) to automate the data collection needed to substantiate tax credit claims, essentially turning a compliance workflow into an automated financial benefit for SMBs.
Last 12 months
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Product timeline
2019
MainStreet founded as a financial platform to help startups and small businesses discover and claim tax credits and government incentives.· pivot
The stack
Accounting gap: none