What is TAM coverage?

Also called market coverage, addressable-market coverage.

TAM coverage is the share of a company's total addressable market that its demand engine actually touches, mapped as named accounts with signals attached, as opposed to the fraction a team reaches when lists are pulled by hand and the rest of the market is never mapped at all.

TAM coverage is the number that hides the cost of a hand-built demand engine. Every week your outreach depends on someone pulling a list by hand, you are working a fraction of your real market. When we assess a team, most are actively touching fifteen to twenty percent of their addressable market. The other eighty percent is not missing because the buyers are not there. It is missing because nobody ever mapped it. Meanwhile most SDR teams spend around sixty percent of their time on research and list-building, production work a system should have removed.

On the Demand Compass, coverage is one of the two things that determine results on the readiness axis, the other being speed. Because you cannot manufacture readiness, a signal you do not capture is a window you do not see, and capture has to run across your whole market, not just the fifth you have already mapped. The Market Map exists for this: map the full addressable market as accounts first, then hang signals on it as they arrive, so an in-market account new to you lands on a company you had already identified instead of floating as an orphan. In the ninety-day install, mapping the addressable market as accounts happens in the first thirty days, alongside the first sensor, so the signals have somewhere to land.

What made full coverage affordable is that per-account research, which used to cost a person an hour no matter how good they were, now costs minutes and pennies with AI. That turns researching the handful of accounts you can get to into researching the entire market, continuously. One client captured the overwhelming majority of its addressable market inside three months, enrichment running automatically.

Market MapThe Market Map is the live, account-level board of the Demand Compass: the two axes run across a company's whole market continuously, so that every account sits in a quadrant with the one move it needs, and sales and marketing orient around one picture instead of arguing across two.
Signal voidA signal void is the third and most expensive form of the single point of failure in a demand engine: buying signals fire constantly across a market, funding rounds, new leaders, stack changes, revealing job posts, website visits, and nobody reads them systematically, so opportunities arrive late or never.
Single point of failureA single point of failure is any core function of a demand engine that runs only while a specific person is actively working it, so that when that person is out, leaves, or has a bad month, pipeline slows or stops, and hiring a backup only moves the dependency to someone else.
Readiness to Buy (the axis)Readiness to Buy is the second axis of the Demand Compass, the one you cannot build and can only detect, and it measures whether there is momentum inside an account right now, a budget freed up, a leader hired, a competitor failing them, that makes the problem you solve urgent today.
enrichment waterfallThe enrichment waterfall is the fixed-order process that resolves a signal fragment to a named person and account, working from the strongest identifier to the weakest and across data providers cheapest first and expensive credits last, with a merge log and a quarantine so that every match is auditable.

Your TAM is probably 5x bigger than your active list.Most B2B revenue teams think they know their market. Their active prospect list tells a different story. Here’s why the gap exists, what it’s costing you, and how to close it without hiring a researcher.
The single point of failure hiding in your GTM motion.If your pipeline slows when one person is out, that’s not a personnel problem. It’s a systems problem. Here’s how to find the dependency before the board does.
How do you detect that an account is ready to buy?Readiness happens inside the account on its own schedule. You cannot create it, so the job is detection, interpretation and speed.
What is the Demand Compass?Two axes, four quadrants, one move each. The instrument that replaces the MQL with a reading of where every account actually stands.

From The Demand Compass, by David Moreira and Marcos Stubrin. All terms · The book