Save smarter
The smartest path to extending your runway
MainStreet is on a mission to help every small business make a big impact. We take the guesswork out of tax credits and pass the untapped savings onto you.
Build with confidence
Your work is worth more than you think
Billions of dollars in tax credits are set aside each year for companies that prioritize innovation through R&D work. But you shouldn’t need an accounting degree to access them.
Our team of specialists will handle the bulk of your R&D tax credit claim, so you can focus on building your business.
Partnering with MainStreet
Unlock time, money, and peace of mind
Understanding tax credits is our full-time job, so it doesn’t have to be yours.
Claim with confidence
We stick to IRS guidelines to ensure that your R&D tax credit claim is always accurate and compliant.
Best-in-class support
Our team of in-house CPAs, tax code specialists, and fellow founders will support you every step of the way.
Track your progress with ease
Discover more with your MainStreet dashboard
Manage your tax credit claim, access savings opportunities, and more.
Welcome to the neighborhood
$150,000,000 in savings and counting
Join the 2,000+ startups and small businesses using MainStreet to extend their runways.
Data & AI
Any founder I meet, first thing I tell them: sign up for MainStreet. It’s the easiest money you’ll ever find.
Lucy Guo
Founder, Scale AI
Web3 & Startups
No deal with the devil, no gotcha. Dealing with the government is opaque and annoying, MainStreet makes it so companies don’t have to deal with it themselves.
Packy McCormick
Owner, Not Boring
Tech
MainStreet is a no-brainer for any startup. Free cash is certainly a strong value prop, there’s no reason not to onboard and let them save you money.
Ryan Hoover
Founder, Product Hunt
Venture Capital
Between Product Hunt, AngelList, On Deck, and Remote First Capital, I’ve met with thousands of founders. It’s shocking how few are taking advantage of MainStreet’s services.
Andreas Klinger
CTO, On Deck
Savings made simple
Sign up for free in just 5 minutes. We search through 200+ credits, finding the ones that best suit your business. Once you qualify, we do the heavy lifting to claim your r&d tax credits and pass the savings on to you.