Size the bet before you make it.
Describe your business and ScaleStudio calculates your TAM, SAM and SOM from the bottom up, then builds the market-opportunity chart for your pitch deck. The honest method is below if you'd rather do it by hand.
Free for now. No signup to start.
Describe your business in a sentence. ScaleStudio drafts the strategy and sizes the market, TAM, SAM and SOM from the bottom up, then builds the opportunity chart below.
What are TAM, SAM, and SOM?
TAM is the total market for the problem you solve. SAM is the slice your product and business model can actually serve. SOM is the share you can realistically win in the next few years. Three numbers, one job: sizing the bet you're about to make.
From one sentence to a sized market.
The hardest part of any strategy is often figuring out the market opportunity. ScaleStudio makes this as easy as 1, 2, 3.
Write one sentence about the problem
Write one sentence about the problem you're solving. ScaleStudio expands it into a problem and solution statement you can refine and confirm.
ScaleStudio AI drafts the whole strategy
16 pages of detailed content. Use cases, customer cohorts, customer sequencing, product roadmap, and more. First draft done for you. Refine as you wish.
Get accurate TAM, SAM & SOM
From that bottom-up strategy, ScaleStudio sizes the market opportunity and plots it over time, so you see TAM, SAM, and SOM at launch and as your product matures.
Two ways to size the same market.
The method is identical, bottom-up from real buyers, price, and reachable segment. The difference is who assembles the model and how fast it recalculates when the plan changes.
| Sizing it by hand | Sizing it in ScaleStudio | |
|---|---|---|
| Where you start | A blank spreadsheet and a research deck | One sentence describing the problem |
| The method | Top-down percentage, because it's fast | Bottom-up from features, cohorts, and roadmap |
| How long it takes | Days of assembling and second-guessing | A first draft in one pass, then you edit |
| Where the numbers live | A spreadsheet nobody opens again | Next to the strategy you're operating from |
| When the plan changes | Rebuild the model by hand | Adjust an input, the chart recalculates |
Bottom-up beats top-down theater.
Top-down sizing feels fast but proves nothing. Start with a giant number, take a percentage, call it a market. The number below is one anyone could have written. Build it from the ground instead, and the market starts telling you who to sell to first.
Size the problem, not the product
TAM is everyone who has the problem you solve, at what they'd pay to solve it. Define it by the pain, not by the feature you happened to ship first. Sizing the product caps the market at yesterday.
Build the number from the ground up
Count real buyers times a real price times how often they buy. If you can't assemble TAM from the bottom, you don't understand the market yet, and no top-down percentage will rescue you.
Cut TAM to SAM by who you can serve
SAM is the part your product, pricing, and channels can reach today. Geography, segment, and buyer all cut it down. Shrinking honestly here is more useful than a bigger number you can't act on.
Set SOM as a bet you can defend
SOM is the share you'll win over the next few years and the reason you'll win it. It's the number that turns a market into a plan, and the one you should be able to argue for out loud.
Every sizing shortcut has a price.
The enemy is the 1% slide.
- 01Top-down sizing starts with a huge number and skims one percent. Anyone can do it, and no one believes it.
- 02A market you sized by shrinking a big number tells you nothing about who to win first.
- 03Chasing the next shiny adjacent market feels like ambition. It reads as a lack of conviction.
- 04Bottom-up sizing forces the real questions: which buyer, what price, how many, and why now.
- 05Conviction comes from a number you built, not a number you borrowed.
Chasing early revenue turns you into a software shop.
A big TAM tempts you to say yes to every paying customer. Each yes bends the roadmap toward one client's needs, and a year later you're staffing bespoke builds for a handful of accounts. The revenue is real. The market you sized is gone, because you've stopped building one product for many customers and started building many products for a few.
Sizing the bet up front is how you keep the discipline to say no to revenue that costs you the market. It also explains a lot of slow, linear growth: the numbers move, the market doesn't.
“That's not building a high-growth startup. That's building a small software business.”
Three chapters. Sixteen sections. One coherent plan.
AI writes the first draft. You edit, refine, and operationalize with your team.
Vision
- ·Problem
- ·Solution
- ·Adoption
- ·Positioning
Solution space
- ·Customers
- ·Use cases
- ·Features
- ·Terrain
Strategy
- ·Team
- ·Roadmap
- ·Market opportunity
- ·Announcements
The obvious objections, answered.
Does ScaleStudio calculate TAM, SAM, and SOM for me?
What's the difference between TAM, SAM, and SOM?
Should I calculate TAM top-down or bottom-up?
My market is huge. Isn't a big TAM a good thing?
How big does my market need to be to raise?
Isn't market sizing just a slide for the pitch deck?
Size it, or score it.
Score the strategy you have, or start the one you need. Based on the frameworks and approaches used by the best Silicon Valley companies.