What is a buy box and why it decides which source fits
A buy box is the written description of the companies you want to buy: the industry or niche, the size (usually stated as a range of SDE or EBITDA), the geography, and the ownership situation, such as a founder near retirement, a family business without a successor, or a corporate carve-out. Most buyers add a few deal terms they need, such as majority control or the owner staying on for a transition.
The buy box decides which source fits because each source sees a different slice of the market. Listings and broker processes show you the owners who have already decided to sell, whatever their fit. Outbound search and databases start from the full list of companies that match your box and reach owners who have not decided. A narrow, well-defined box favors direct outreach; a broad box with a fast timeline can be served by marketed deals. For a worked approach to writing one, see buy box criteria.
The five ways buyers source deals
a. Business brokers and sell-side advisors
What it is: Intermediaries engaged by the owner to sell the company. Business brokers tend to handle smaller, owner-operated businesses; M&A advisors and investment banks tend to handle larger companies and run a negotiated or auction process.
How deal flow reaches you: The intermediary markets the company: a blind teaser goes to buyers on its list, interested buyers sign an NDA, receive an offering memorandum and submit indications of interest by a deadline. Getting on the right intermediaries' lists, and staying on them, is how you see these deals.
Typical cost model: The seller usually pays, through a success fee at closing and sometimes a retainer or engagement fee. Buyers typically pay nothing to see the deal, though the fee shapes the asking price.
Strengths: Sellers who are ready, prepared materials, a defined timeline, and little sourcing effort on your side.
Limits: You compete with other buyers, the process is built to maximize price, and you only see owners who decided to sell and chose that intermediary.
Who it fits: Buyers with a broad buy box, competitive capital and a need to close in a defined window, and anyone who wants marketed deals alongside direct ones.
b. Online marketplaces and listing sites
What it is: Websites where brokers and owners post businesses for sale, searchable by industry, location, price and earnings. Some focus on main street businesses, some on online businesses, some on larger companies.
How deal flow reaches you: You search or set alerts, then contact the listing broker or owner. Most listings come from brokers, so the deal usually runs as a marketed process once you engage.
Typical cost model: Browsing is often free for buyers; some sites charge buyers a subscription for alerts, deeper data or earlier access, and charge sellers or brokers to list.
Strengths: Volume, low cost, and a quick read on what is on the market and at what asking prices.
Limits: Listings are visible to every buyer, quality and accuracy vary, companies that closely fit a narrow buy box are rarely listed, and many listings are small, owner-operated businesses.
Who it fits: Individual buyers and first-time searchers buying smaller businesses, and any buyer who wants to benchmark asking prices.
c. Proprietary outbound and retained search firms
What it is: Firms the buyer engages to find companies that fit its buy box and contact the owners directly, by phone, email and mail, before any sale process exists. Some call this buy-side origination or retained search.
How deal flow reaches you: The firm builds a target list against your criteria, runs outreach in your name or its own, screens owners for interest and fit, and hands you introductions or booked conversations with owners who have not hired an intermediary. See what proprietary deal flow is for how to tell a direct conversation from a marketed one.
Typical cost model: The buyer pays. Common structures are a monthly retainer, a retainer plus a success fee at closing, a fee per qualified meeting, or a success fee only.
Strengths: Reaches off-market owners on your exact criteria, you are often the only buyer in the conversation, and you can see the full target universe and outreach record.
Limits: Costs start before any deal closes, owners who were not planning to sell take time to reach a decision, and results depend heavily on list quality, outreach compliance and how well the buy box is defined.
Who it fits: Private equity firms building platforms or add-ons, family offices, holding companies, funded searchers and independent sponsors with a specific buy box who want more direct owner conversations than they can generate themselves.
Where Axia Growth sits: Axia Growth's retained buy-side search sits in this category. A buyer sets the mandate, Axia builds the list, calls owners as Axia and books the buyer with owners who qualify.
d. Buyer databases and data subscriptions
What it is: Company and owner data you license and work yourself: firm names, industries, locations, estimated size, owner names and contact details, sometimes with signals such as owner age or hiring activity.
How deal flow reaches you: You search the data against your buy box, build a list and run outreach yourself or through your team. The database supplies targets, not conversations.
Typical cost model: A flat or tiered subscription, priced by seats, records, exports or contact credits, usually billed monthly or annually. Outreach tools and staff time are extra.
Strengths: Full control over targeting, a lower cash cost than outsourced outreach, and a list you can reuse across mandates.
Limits: Coverage of small private companies is thin and data goes stale, so lists need enrichment and verification. The work of reaching owners, and the compliance that comes with it, stays with you.
Who it fits: Buyers with in-house analysts or business development staff, and search funds or sponsors who want to run their own outreach on a budget.
Where Axia Growth sits: Axia Growth's buyer database also sits here: searchable owner and company data built from the same sourcing described on how Axia sources data, for buyers who want to run outreach themselves.
e. In-house business development
What it is: Analysts, associates or business development hires (employed or outsourced) whose job is to build lists, call and email owners, attend industry events and keep a pipeline of relationships.
How deal flow reaches you: Your own team reaches owners and intermediaries, qualifies interest and brings opportunities to the deal team. Over time the team also builds referral relationships.
Typical cost model: Fully loaded salary and benefits, plus data, outreach software, phone and email infrastructure, travel and management time. Outsourced analysts are usually billed hourly or monthly.
Strengths: Complete control over message, targeting and timing, institutional knowledge that stays with the firm, and owner relationships held by your own people.
Limits: The highest fixed cost, slow to ramp, dependent on hiring and retaining the right people, and the team carries the full compliance and infrastructure burden.
Who it fits: Firms with steady, multi-year acquisition programs, such as active private equity platforms and serial acquirers, that can keep a team busy.
Also: network and referral sourcing
Bankers, CPAs, attorneys, wealth managers, lenders and industry contacts introduce owners they know, usually for no fee or in exchange for future work, and these introductions convert well because they come with trust. The volume depends on a few relationships and their timing, so most buyers treat referrals as a complement to one of the five sources above, as described for independent sponsor deal flow.
Deal sourcing options compared
| Source | Deal flow type | Who pays and when | Control over targeting | Speed to first conversations | Effort required from buyer |
|---|---|---|---|---|---|
| Business brokers and sell-side advisors | Marketed | Usually the seller, mostly as a success fee at closing | Low: you see what intermediaries bring to market | Depends on what is for sale; fast when a fitting deal is in process | Low to find, high to compete and win |
| Online marketplaces and listing sites | Marketed | Often free to browse; some buyer subscriptions; sellers or brokers pay to list | Low: limited to what is listed | Fast to contact, slower to find a fit | Moderate: screening many listings |
| Proprietary outbound and retained search firms | Off-market | The buyer: retainer, retainer plus success fee, per meeting, or success fee only | High: built on your buy box | Weeks to build the list and start outreach, then a steady flow | Low to moderate: set criteria, take meetings, give feedback |
| Buyer databases and data subscriptions | Off-market (you make the contact) | The buyer: monthly or annual subscription, plus tools and staff time | High: you build the list | Depends on your outreach capacity | High: list building, enrichment and outreach |
| In-house business development | Off-market and marketed | The buyer: ongoing salaries and infrastructure, whether or not a deal closes | High: your team decides | Slow to ramp, then steady | Highest: hiring, managing and equipping a team |
| Network and referral sourcing | Off-market, sometimes marketed | Usually no fee; sometimes a finder's fee or future work | Low: depends on who your contacts know | Unpredictable | Moderate: ongoing relationship building |
Typical cost models for deal sourcing
Deal sourcing costs come in five structures. We describe the structures and leave out dollar and percentage ranges, because we have not found a dated public source for deal-sourcing fees that we can cite. Ask every provider for its fee schedule in writing and compare the total cost per qualified owner conversation, not the headline fee.
- Monthly retainer. A fixed fee each month for list building and outreach, paid whether or not a deal closes. It funds the work up front and is common for outbound and retained search firms. Check the minimum term and what the retainer includes.
- Retainer plus success fee. A lower monthly fee plus a fee paid only if you close on a company the firm introduced. It splits the risk between buyer and firm. Check how the success fee is calculated, when it is owed, and how long after the engagement ends it still applies (the tail).
- Success fee only. Nothing up front and a fee at closing. It is common on the sell side, where the seller pays the broker or advisor, and less common on the buy side, where firms take on months of work before any closing. A firm that is paid only on a completed transaction may need to rely on the M&A broker exemption from federal broker-dealer registration [3] or hold the right registration.
- Flat or tiered subscription. A set monthly or annual price for data access, priced by seats, records, exports or contact credits. It is predictable, but the outreach, tools and time to work the data are separate costs.
- Fully loaded in-house cost. Salary, benefits and bonus for each hire, plus data, outreach software, phone and email infrastructure, travel and management time. It is the largest fixed commitment, and it runs whether or not the team finds a deal.
Where Axia Growth fits
Axia Growth works on the buyer side, for private equity firms, family offices, holding companies, search funds and independent sponsors. It offers two things from this guide. Retained buy-side search: Axia sources the buyer's buy box, runs the outreach, and books the buyer with owners who qualify (category c). A buyer database: searchable owner and company data for buyers who run their own outreach (category d). Axia also works with investment banks and business brokers looking for owners who want to sell, but this guide is about buying.
What Axia is not: Axia is not a broker and does not represent sellers. It identifies privately held companies that may fit a client's acquisition criteria, conducts initial outreach to their owners, and introduces interested parties; it does not value businesses, negotiate transaction terms, structure transactions, or participate in due diligence or closing [5]. Axia does not hold any state securities, business-broker, or real estate broker license, and it is typically engaged and compensated by the prospective buyer [5]. Where its compensation is contingent on a completed transaction, it relies on the M&A broker exemption [3][5].
If you want to see whether retained search fits your buy box, start with mandate scoping or read how it works for buyers. If you are weighing the two Axia options against each other, the data sourcing page shows how the underlying owner data is built.
How to choose a deal sourcing firm or source
There is no single best deal sourcing firm, only a best fit for a given buy box, budget and team. Use these criteria to compare any broker relationship, outbound firm, database or hire, and ask each provider for evidence on every one:
- Fit with your buy box. Ask how the provider would build your target universe, how many companies it expects to find, and which recent work matched your industry, size and geography.
- Proprietary or marketed. Ask whether the owners you meet have engaged an intermediary or are already in a sale process, and how the provider tags that. A marketed deal is not wrong; it is just a different deal.
- Reporting transparency. Ask to see the full target list, the outreach record for each owner, and the definition of a qualified conversation before you sign, not after.
- Outreach compliance. Marketing email must follow the CAN-SPAM Act, which makes no exception for business-to-business email [2]; most calls to businesses are exempt from the Telemarketing Sales Rule, with exceptions [4]. Ask how the provider identifies itself, handles opt-outs and verifies contact data.
- Who owns the data. Ask whether the target list, owner notes and contact history belong to you at the end, and whether the same list is sold to other buyers.
- Contract terms and exit. Ask about the minimum term, notice period, exclusivity, how success fees are defined, and the tail period after the engagement ends. Have your attorney read the agreement.
- References. Ask to speak with buyers similar to you who used the provider in the last year, and ask them what share of their meetings fit the buy box.
How different buyers tend to source
Search funds: a searcher, backed by investors, looks for one privately held company to acquire, manage and grow [1], so most searchers combine brokers and listings with their own outbound, and sometimes a database or outsourced outreach. See the search fund deal sourcing playbook. Independent sponsors, who raise equity deal by deal, lean on referrals and direct outreach because a proprietary deal is what they bring to investors. Private equity firms and family offices often run several sources at once: intermediary coverage for marketed deals, plus outbound or in-house business development for add-ons and off-market platforms. For who buys at each size, see is my business big enough for private equity?, and for valuation context, the multiples index.
More on off-market channels: off-market deal sourcing channels. More buyer guides are on the resources hub, and company facts are on the about page.