Proprietary search exists because the open market is crowded. Every search fund can see the same broker listings and bid in the same auctions, and most of them won't close a deal this year. Proprietary outreach is supposed to be the way out. You build your own list of owners. You write your own message. You open a channel nobody else is using.
That's the pitch. In practice, most searchers running proprietary outreach don't own much of it. They rent the software that sends the emails. They rent the contact data that tells them who to email. They rent the platform that tracks replies and holds every conversation history, from a vendor selling the identical setup to every other searcher in their pipeline this month.
What "Proprietary" Actually Means
Proprietary usually describes the deal. You found an owner before a broker did, so the deal is proprietary. It should also describe the pipeline. If the list, the sending accounts, and the reply history all live inside someone else's platform, under someone else's terms of service, what you actually have is a subscription.
The distinction matters because a subscription can end on someone else's schedule. Yours doesn't get a vote. Stanford's 2024 Search Fund Study puts the search funnel at roughly 3,000 companies screened to reach 159 real conversations, four LOIs, and one acquisition, over a median search length of about 20 months. That funnel is the actual asset a searcher spends two years building. If the tool holding it changes its pricing, gets acquired, or shuts off your account, the funnel doesn't come with you unless you built it to.
The Parts of Your Stack You Don't Actually Own
A typical proprietary outreach stack has three layers, and most searchers only think hard about one of them.
- Sending infrastructure. Most cold email tools issue you domains and mailboxes inside their own ecosystem, with warmup and authentication tied to their platform. Move to a different tool and you're often starting domain reputation from zero.
- Contact and company data. Enrichment and list-building tools license data under terms that specify what happens when you cancel. Some let you export and keep records indefinitely. Others only let you query live, which means the list disappears the day the subscription does.
- Reply and relationship history. Every reply an owner sends, every note about their business, every "call me back in six months," lives inside whatever CRM or sequencing tool ran the campaign. That history is worth more than the list it came from.
What Happens When the Vendor Changes the Deal
None of this matters until it does. Cold outbound tools raise prices after they've captured a customer base. Data providers get acquired and either raise prices or drop coverage for the smaller industries a searcher actually needs. Email platforms periodically suspend accounts in bulk when spam complaints spike across their whole user base, and a searcher running one domain through one tool can lose weeks of outreach mid-campaign with no warning.
This is just what happens when your outreach depends on someone else's business decisions instead of your own.
Data Ownership Is the One Most Searchers Skip
Sending infrastructure gets rebuilt. It's annoying, but a new domain and a fresh warmup period is a solvable problem. Data is different. If you paid to enrich and verify a list of owners in your target industry, and the license only lets you use that list while you're a paying customer, you didn't buy a list. You paid to rent one, for as long as the vendor wants your money.
The fix isn't complicated. Before you commit budget to a data or outreach vendor, find the answer to one question: what do you keep if you cancel tomorrow? If the answer is nothing, that subscription is building the vendor's retention numbers instead of your deal flow.
What Owning Your Stack Actually Looks Like
The Bottom Line
Proprietary search is supposed to be the strategy that takes you out of the auction. It only works if you own the pipeline behind it. A searcher who owns their domains, data, and reply history can switch vendors or survive a price hike without losing months of work. A searcher who doesn't is one policy change away from starting over.
The list, the message, and the channel are yours to control. Make sure the infrastructure underneath them is too.
