Key takeaways
- A TAM list names companies; a TAM figure sizes a market. This page covers the list.
- Hard limits on who could ever buy come before any search.
- Slices by region, industry and size keep each search reviewable and gaps visible.
- Breadth is the point; prioritising comes later, in the target account list.
What is a TAM list
A TAM list is the list of every company that could plausibly buy what you sell, named one by one. It differs from a total addressable market figure, which estimates the money in a market; the list is the working version your team can prospect from.
It is deliberately broad. Its job is to make sure no good-fit company is missing, not to decide which ones to call this week.
How do you set the edges of your total addressable market list
Set the edges with hard limits only: the conditions under which a company could never buy, whatever its other qualities. Soft preferences belong in the ICP and the target account list, not here.
- The countries and languages you can sell and support in.
- The smallest company that has the team or problem you serve.
- Industries you cannot serve, for regulatory or practical reasons.
- Business models your product does not fit.
Why build your account universe in slices
Build the account universe in slices because every search returns a limited number of results, and a slice you can read in full shows you what is missing. One giant search hides its gaps.
In Pebbles Ai, one company search returns up to 50 companies, so TAM sourcing becomes a series of narrow searches: one region, one industry and one headcount band at a time. Keep a running note of which slices you have covered.
How do you keep a TAM account list usable
Keep a TAM account list usable by holding one record per company, tagged with the slice and the ICP it fits, and by marking customers, partners and competitors so nobody prospects them by mistake. Duplicates creep in fast when slices overlap.
Date the list and revisit it when you enter a new market or your product starts to suit a new kind of company. Companies are founded, merge and close, so an undated list ages quietly.
How is a TAM list different from a target account list
A TAM list is about breadth and a target account list is about priority. The TAM list holds every company that could buy; the target account list picks the few your team will work deliberately this quarter, with owners and tiers.
Build the TAM list first. Choosing targets from a list with gaps means your best prospects may never be considered.
How to build a TAM list, step by step
Set the limits once, then work through the slices one at a time.
- Write the hard limits of who could ever buy: the regions you serve, the smallest company that needs you and the industries you rule out.
- Split the market into slices by region, industry and headcount band.
- Run one company search per slice and note which slice each company came from.
- Merge the slices, remove duplicates and mark current customers, partners and competitors.
- Record the accounts in your CRM against the ICP they fit, and date the list.
Where Pebbles Ai fits
Common questions
How big should a TAM list be?
As big as the market really is within your hard limits. Padding it with poor fits only makes the later prioritising harder.
Can I work out market size from a TAM list?
A count of accounts multiplied by a realistic yearly contract value gives a rough estimate. State your assumptions, because the estimate is only as good as they are.
Can Pebbles Ai give me every company in a market at once?
No. Each company search returns up to 50 companies, so you build the list in slices and keep track of the ones you have covered.
About this page. Written by the Pebbles Ai team for people who run sales, marketing and growth. Last updated .
