Bottom-up market sizing
A market size built from counted organisations, not a top-down report: TAM, SAM, your beachhead and the expansion waves, each with its assumptions and sources.
For each segment and geography: how many organisations exist, what share you can reach with today’s product and channels, and what each would pay a year. TAM, SAM, the beachhead and the expansion waves follow from those inputs.
What’s inside
- Segments: segment by geography, with TAM and SAM for each row
- Summary: TAM, SAM, beachhead and waves as the figures for the deck
- Sanity checks: the share of SAM and the customers you would need at £1m, £5m and £10m ARR
- Sources: one line per count, with publisher, date and link
Start here. Fill the beachhead rows only (segment, geography, count, reachable share and ACV), add one source line per count, then read the beachhead SAM and total SAM on the Summary tab.
Every file comes filled in with a worked example for Northlight AI Ltd, a fictional company. Blue cells are yours to overwrite; white cells calculate. Formats show £: for €, change the currency format on the number cells.
