Business broker vs M&A advisor vs investment banker: which fits your company size?

Which one should you hire?

Match the advisor to how your company will be valued and who will buy it. Owner-operated businesses valued on seller's discretionary earnings usually sell through a business broker; companies with a management team and adjusted EBITDA that interests private equity usually hire an M&A advisor; larger or more complex deals, especially those involving capital raising, call for an investment bank.

The labels overlap and firms draw the lines differently, so a fixed revenue cut-off is less useful than three plain questions. Even the phrase small business tells you little here: for research purposes the SBA Office of Advocacy's 2026 small business FAQ counts any independent business with fewer than 500 employees as small, which covers nearly every company a broker sells and many that M&A advisors and investment banks sell too.

The three-question size rule

Answer these three and the choice usually becomes obvious.

1. How will buyers measure your earnings? If they will look at seller's discretionary earnings (profit plus the owner's pay and perks), you are in business-broker territory. If they will look at adjusted EBITDA and a management team that stays after closing, you are in M&A-advisor territory.
2. Who is the likely buyer? Individuals, first-time owner-operators and search funds point toward a broker. Private equity sponsors, family offices and strategic acquirers point toward an M&A advisor or an investment bank.
3. Does the deal involve raising capital or a complex structure? A minority recapitalization, a growth equity raise or a carve-out needs a firm registered to be paid for securities work, which usually means an investment bank or a registered M&A boutique.

If two of the three answers point the same way, start your search there.

Business broker vs M&A advisor vs investment banker, side by side

What the securities rules say

Selling a company by selling its shares is a securities transaction, so the federal broker rules matter to sellers more than most expect. Section 15(a)(1) of the Exchange Act, 15 U.S.C. 78o, makes it unlawful for an unregistered broker to use interstate commerce to effect, or induce, securities transactions, subject to listed exceptions.

Since March 29, 2023, Section 15(b)(13) of the same statute has exempted M&A brokers who effect securities transactions solely to transfer ownership of an eligible privately held company: one with no registered or reporting securities that, in the fiscal year before the engagement, had EBITDA under $25 million or gross revenues under $250 million. As Greenberg Traurig's alert summarizes, the exemption carries conditions, including that the buyer will control and actively manage the company, and it does not cover capital raising or override state registration requirements.

For an owner, the practical point is simple: ask every advisor how they are licensed, whether they rely on the exemption, and what changes if the deal becomes a recapitalization instead of a sale.

This is general information, not legal, tax or financial advice. Confirm with your own counsel before signing an engagement letter.

When each one wins

When a business broker wins

• You work in the business daily and the likely buyer will step into your role.
• The value story is cash flow to an owner rather than a management team.
• You want a simpler process with little or no upfront cost.
• Local buyers, or buyers already in your industry nearby, are the most likely acquirers.

When an M&A advisor wins

• A leadership team runs the company and will stay after closing.
• Private equity platforms looking for add-ons are realistic buyers.
• You need a full CIM, a curated buyer list and hard negotiation on LOI terms such as working capital, earnouts and indemnities.
• Confidentiality matters enough that you do not want a public listing.

When an investment bank wins

• The company is beyond the lower middle market, or the buyer universe is international.
• You want a competitive auction among many sponsors and strategics.
• The transaction may involve raising capital, a recapitalization or a carve-out.
• Financing, fairness or public-company questions are likely to come up.

Questions to ask any advisor before you sign

• How many deals of our size and sector have you closed in the last three years, and can we speak to two of those sellers?
• How are you licensed, and do you rely on any registration exemption?
• What is the full fee structure: retainer, success fee, minimum fee and expenses?
• How does the engagement letter define a transaction, and does that include a recapitalization or a license?
• How long is the tail period after the engagement ends, and which buyers does it cover?
• Who on your team will run our process day to day?
• How will you build the buyer list and protect confidentiality?

Where data licensing fits beside any of the three

Licensing operational records is a separate decision that can sit alongside a sale or stand in for one for now. If your company is US-based, reached 50+ full-time employees at peak (contractors excluded), has a multi-year operating record, owns what it recorded and has an owner or officer able to sign, it can license those records to AI labs and data buyers through SourceX and keep ownership. The company receives one all-in price, paid once, with SourceX's fee included and no separate charges.

Brokers, M&A advisors and bankers can all introduce a client. The subject tends to come up when a listing stalls, when a deal falls through or when an owner has no successor; the guides on stalled listings, sales that fall through and owners without a succession plan cover each moment. Advisors weighing it as a revenue line can read additional income for business brokers. If you have signed an LOI with exclusivity, speak to deal counsel before any license conversation.

Next step

Owners can check fit in a few minutes with the company fit checker, read the who qualifies baseline and apply directly at sourcex.si/apply. Brokers, M&A advisors and bankers who want to introduce clients can register as a partner.