Business Broker vs M&A Advisor vs DIY: Which to Use (2026)

Business broker, M&A advisor or do it yourself: the honest answer depends on 2 things, the size of your company and whether you already have a buyer. Brokers list Main Street businesses and wait for buyers to call. M&A advisors build the materials, call the buyers and run the negotiation. DIY works when a credible buyer is already at the table and there's nothing to auction. In 2026, most founders who email us are choosing between the last two, and the choice turns on what a run process is worth for their company, not on which option is cheapest.

Use a business broker for a Main Street company worth under about $2M: a listing and a local buyer pool. Use an M&A advisor or boutique bank from roughly $5M up, when price depends on competition between strategic and financial buyers. Sell it yourself when one credible buyer has already made an offer. In our work on 50+ M&A transactions, the process, not the label, decided the price.

Full disclosure: Waveup runs a sell-side M&A advisory practice on a fixed retainer, so we have a view. We also send founders to brokers and marketplaces, and tell some of them to take the inbound offer and skip the fee. If you're still deciding whether to sell at all, start with how to sell your startup. This guide is the next decision, in the order you'll face it: what each route actually does, what it costs, what a run process changes, and the hybrid that sits in between.

What's the difference between a business broker and an M&A advisor?

A business broker lists your company, screens the buyers who respond and takes a commission at closing; the model is built for Main Street businesses under about $2M. An M&A advisor goes to the buyers: valuation, confidential information memorandum, a curated list of strategic and financial acquirers, a managed bidding process and negotiated terms. The difference isn't the title, it's who does the finding and how much gets negotiated.

A business broker is the estate agent of company sales, and that isn't an insult. Brokers sell the majority of businesses priced under $5M, work mostly on straight commission, and most are local generalists running a book of listings rather than a handful of mandates (Morgan & Westfield). The engine is the listing: a blind ad, NDAs for the buyers who respond, screening, then a negotiation over price and transition. Licensing varies by state, and 17 US states require a business broker to hold a real estate license (BizBuySell).

An M&A advisor sells the other way round. Instead of waiting for buyers, the advisor decides who should buy you, then builds the case: a valuation, a confidential information memorandum, a financial model that survives diligence, a data room, and a buyer list of strategics and sponsors worked in parallel so no single bidder controls the clock (Windsor Drake). Boutique advisors and lower-mid-market banks cover founder-owned companies; the bulge bracket starts where founders rarely reach. One US wrinkle: anyone paid on the size or outcome of a transaction involving securities may need broker-dealer registration, so ask which side of that line your advisor sits on (SEC).

DIY isn't one route, it's 2. The first is responding to an inbound offer: a competitor, a customer or a PE firm's outreach team has named a price and you negotiate it with a deal lawyer. The second is listing a small, profitable business on a marketplace such as Acquire.com, which charges a closing fee that falls as the asking price rises and leaves the preparation to you (Acquire.com). Both work. Neither creates competition, and competition is the thing that moves price.

What does an M&A advisor actually do, week by week?

An M&A advisor prepares the company for sale, builds the CIM and model, values it, assembles and works a buyer list, runs the bidding to a signed LOI, manages diligence and negotiates the purchase agreement. In a survey of 85 owners who sold with a banker, managing the process ranked as the most valuable service and finding the buyer the least (McDonald, Fairfield University). Founders find that surprising; we don't.

Notice what the middle column is missing. A broker's process has no outreach phase; the market comes to the listing, or it doesn't. That's fine for a laundromat or a dental practice, where the buyer is a local operator and the price is a multiple of cash flow everyone knows. It's the wrong shape for a company whose best buyer is a strategic in another country who has never heard of you. Selling that company means going to the buyer, and going to the buyer is the advisor's job.

Who prepares a CIM?

The sell-side advisor prepares the CIM, with management supplying the facts and signing off on them. At a bank, senior bankers interview the owner and analysts build the document (Wall Street Prep). Brokers usually work from a shorter confidential summary attached to a listing. Founders selling alone can draft their own, and at Waveup, Olena Petrosyuk (ex-Lazard, JP Morgan) writes or reviews every CIM.

When a company goes to market with a banker or M&A advisory firm, the advisor prepares the CIM and uses it as the marketing document, and buyers sign an NDA before they receive it (CFI). The division of labour matters. The advisor drafts, shapes the narrative and does the synergy maths for each buyer type; management owns the accuracy, because a CIM that diligence contradicts is a re-trade waiting to happen. A full CIM takes us 4–6 weeks, and a real one, section by section, is in our CIM example.

Can you write it yourself? Yes, and for a marketplace sale a tight summary is enough. For a strategic or PE buyer, the CIM is the document their investment committee reads, and a founder-written one usually describes the business without answering the buyer's actual question: what is this worth to us, and what is the path to a return? That gap is what our CIM writing service exists to close; CIM Express starts from a $10K retainer and takes 2–3 weeks.

What does each route cost in 2026?

A broker works on straight commission with a $10K–$25K minimum and no retainer. An M&A advisor charges a retainer plus a success fee that falls as the deal grows; there's no single average, which is why we wrote a separate M&A advisor fees guide. DIY costs legal fees, a marketplace closing fee if you list, and your time. Waveup's advisory starts from a $10K retainer with no success fee.

Read the last column before the second. A straight-commission broker is paid to close quickly and has to price the listings that never sell into the ones that do (Morgan & Westfield). A success-fee-only advisor in a market where deals take longer and fall apart more often is making a bet, and one contributor to Axial's 2026 fee guide called it exactly that (Axial). Fee level matters less than what the fee makes the advisor want. What is the average fee for an M&A advisor? There isn't one; the percentage slides with deal size, and the full arithmetic, Lehman formulas included, is in our M&A advisor fees guide.

Does a run process actually change the price?

Yes, and the mechanism is competition. Across thousands of private-company acquisitions, sellers who retained advisers received higher valuations after adjusting for who chooses to hire one (Agrawal et al., Quarterly Journal of Finance). Larger deals draw several bidders while the smallest draw 1 or 2 (IBBA, Q2 2026). More bidders, better terms, fewer re-trades: that's what we've seen the process buy.

The evidence base, in 1 paragraph. Agrawal, Cooper, Lian and Wang examined 4,468 acquisitions of private sellers over 3 decades and found that private sellers receive significantly higher valuations when they retain M&A advisers; larger sellers, subsidiaries and sellers headquartered in a different state from the buyer were the most likely to hire one, and the authors attribute the effect to more competing bids and less information asymmetry (Harvard Law School Forum on Corporate Governance). Michael McDonald of Fairfield University surveyed 85 owners who sold for $10M–$250M through a middle-market banker: 84% said the final price equalled or beat the banker's initial estimate, managing the process and structuring the transaction ranked as the most valuable services, and finding the buyer ranked last (McDonald, Fairfield University). The IBBA and M&A Source Market Pulse for Q2 2026 reports that 87% of deals over $5M attracted at least 3 offers, and that sellers received 83–92% of the price in cash at close (IBBA).

3 caveats, because this is where advisors oversell. The academic result is an average across sellers who chose to hire; it doesn't say every company benefits, and the authors note that sellers hire advisers when it makes economic sense (Quarterly Journal of Finance). In McDonald's sample, only 52 of the 85 advised owners ran a full auction; the rest negotiated with a single buyer or used the credible threat of a process (McDonald). And a sale to a trusted partner or a friendly competitor at small size may not justify an advisor's fee at all (Raincatcher). The process is worth paying for when there's something to compete for.

Do I need an M&A advisor to sell my business, or can I sell it myself?

Not always. Sell it yourself when a credible buyer has already made an offer, a marketplace listing reaches your buyer pool, your financials are clean and your lawyer has closed sales before. Hire an advisor when price depends on buyers you can't reach, when structure matters as much as price, or when a board will hold you to the outcome. We've seen both go well; preparation decided it.

Selling your business yourself works in 4 situations we see often:

1. An inbound offer from a buyer you'd have picked anyway. A strategic or PE platform has named a number. Get a third-party valuation so you know whether the number is fair, check where your category trades in our exit multiples by industry guide, then negotiate with counsel.
2. A small, profitable online business. A marketplace such as Acquire.com gives you buyer volume, escrow and transfer for a closing fee, and a self-run process is the norm there (Acquire.com).
3. A sale to someone who already knows the business. A partner, a key employee, a friendly competitor. There's no information gap to close and no auction to run (Raincatcher).
4. A clean company and an experienced lawyer. Financials reconciled, cap table tidy, IP on paper, and counsel who has closed sales rather than financings.

It fails in the mirror image: a buyer the company can't verify, a data room built after the LOI, projections nobody has stress-tested, and a founder negotiating a structure they've never seen. 7 of 10 founders we work with underestimate what buyers ask for in diligence, and that's where DIY sales lose the price they were promised at LOI. Who are the top M&A advisors? By deal value, the bulge bracket; by usefulness to you, whoever closes deals your size every year, which is how our guide to the best M&A advisors for startups sorts them. The top of the league tables won't return a call on a $20M sale.

What is the hybrid route: an advisor for the CIM and buyer list, the founder in the room?

The hybrid splits the job: an advisor prepares the company (valuation, CIM, model, data room, buyer list) on a fixed retainer, and the founder runs the buyer meetings and negotiation. It's where Waveup sits: M&A advisory from a $10K retainer with no success fee, the package delivered before any buyer sees the company. You keep every point of success fee you didn't sign away.

Why this shape exists. Preparation is where most of a sale's price is won or lost, and it's the phase a success-fee advisor is least paid to linger in. On a retainer, Olena Petrosyuk, who leads M&A at Waveup after Lazard, JP Morgan and Oliver Wyman, writes or reviews the CIM, the financial model is driver-based and built to survive a quality-of-earnings review, the valuation is defended against comparables, and the data room is indexed against the buyer's diligence list. Then you choose who runs the meetings: you, with counsel; us alongside you; or a bank with a success fee for the auction alone.

When the hybrid is wrong, plainly. If your buyer universe is a long list of global strategics and the board wants a bulge-bracket name, hire the bank and let it run everything. If the company is under about $3M and local, list it with a broker; our retainer would eat too much of the price. If you only want to pay on success, we're not your firm; nearly a third of advisors in Axial's 2026 survey work that way (Axial). And if you're weeks from a signed LOI, you need a deal lawyer and a QoE provider, not a CIM. The ideal window for the hybrid is 12–24 months before the close you want.