•  Venture
  •  Main Street Business

MainVest Review

Founded by tech-company veterans (including several former Uber employees), Mainvest is a stellar example of how to make online alternative investing look and feel a lot like ecommerce. Some novel investment vehicles, and a clear focus on local businesses sets MainVest apart from other Reg CF portals.


  • Investment Types: Venture and Main Street Business
  • Sectors: Restaurants
  • Minimum Investment: $100
  • Advertised Returns: 8-10%
  • Open to all investors
  • Excellent website user experience, including solid investor education materials
  • Very transparent investment terms
  • Novel "petitions" feature allows prospective investors/customers to ask for particular businesses in their community
  • No investor fees
  • Open to all investors
  • Minimal investment activity (several open investments have raised less than $1000)
  • Short track record


This MainVest Review will help you learn more about MainVest's investment offerings, including how the alternative investments on MainVest are structured, and what your potential returns might be. You can read more about the criteria we use to review investment platforms here.

Reg CF is finding a nice niche serving the kinds of businesses that aren’t likely to attract interest from traditional venture capital, like restaurants, retail, and entertainment. MainVest follows the lead of LocalStake in squarely targeting just those kinds of businesses with their investment offerings, exclusively focusing on brick-and-mortar businesses.

Types of investments MainVest offers

MainVest offers debt investments in small, local businesses like restaurants, breweries, beauty salons, and yoga studios. All investments are currently open to anyone via Reg CF.

What do you get when investing with MainVest?

Mainvest currently offers one type of debt security called the Revenue Sharing Note, which is like an unsecured loan, but is repaid based on the revenue or actual performance of the business. Investors may be paid back faster if the business outperforms revenue expectations.

MainVest refers to these investments as “Revenue Sharing Notes” (RSNs). As an example, a business offering a 1.5x investment multiple and is sharing 5% of revenue will pay 5% of its revenue to investors quarterly until a 50% total (not annual) return is reached (1.5X the initial investment). If the principal and 50% return haven’t been paid back in 5 years, the full remaining balance is due. The revenue share percentage, length of the loan and total return vary from business to business

How does MainVest make money?

MainVest itself doesn’t charge investors any fees, but does charge issuers a percentage of the amount raised (typically 6%), which investors should understand reduces the amount of capital the business actually receives for operations.

Potential returns and cashflow

Investments made via MainVest are high-risk investments in small businesses.

With the revenue share investments, the borrower pays a predetermined percentage of their revenue each quarter until a defined multiple of the original investment is reached (either 1.25 or 1.5, depending on the security type). For example, with the Revenue Sharing Notes, investors receive 5% of sales (which may fluctuate each month) until investors receive 1.5X their original investment, but for no more than 5 years (if investors haven’t received the 1.5X by then, the full amount comes due).

The revenue share model is clever, and it’s obvious why it’s appealing to businesses facing unpredictable cash flow.

It can be a bit tricky to compare investments apples-to-apples, but as a rule of thumb to get an approximate IRR equivalent, you can take the multiple, raise it to 1 divided by the term in years, and then subtract one. For example, with a multiple is 1.5 and a term of 5 years, 1.5^(1/5) - 1 = 8.5%, which is a far cry from the advertised returns of 50% or more (which may indeed represent total returns, but investors should be sure to understand the time horizons involved). Note that if the full multiple is paid before the term is over, the effective rate of return would be higher.

Breadth of offerings on MainVest

As of this writing there are 7 investment opportunities available, all in Massachusetts.

Regulatory framework

MainVest is an SEC registered Title III Funding Portal. That means they are subject to a range of rules and obligations around investor education and due diligence. All developers offering Reg CF investments on MainVest will have been through background checks of key officers and owners, and there are clear links provided to the relevant SEC filings made by the issuer.

Prospective investors also have access to an online channel for asking questions of the issuer (and viewing answers of prior questions from others).

This review was first published on 11 December 2018, and last updated on 15 October 2020.

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