Methodology
We score the need before we score the tool.
Business Stack Index exists to answer a harder question than "which software is best?" The first question is whether your business needs that category at all.
1. Category Need Score
Every software category receives a score from 0 to 100. The score starts with the business type and is adjusted by operational signals such as lead volume, appointment frequency, sales complexity, team size, collaboration, automation needs, business stage, and whether the business sells online.
| Score | Label | Meaning |
|---|---|---|
| 70-100 | Must Have | This category is likely part of the core operating stack. |
| 45-69 | Useful Soon | There is a real use case, but it may not need to be purchased first. |
| 25-44 | Optional | The category can help in some workflows but is not essential based on the current answers. |
| 0-24 | Skip | The engine recommends not adding this category yet. |
2. Tool Fit Score
Products are ranked only after their category clears the minimum need threshold. Tool Fit considers business-type fit, team-size fit, workflow signals, budget compatibility, and simplicity. We also show reasons so readers can see why a tool received its score instead of relying on unexplained star ratings.
3. Affiliate relationships are outside the scoring model
Affiliate status, commission rate, cookie duration, payout amount, and partner tier are not inputs to either score. Affiliate metadata is stored in a separate data file and is not imported by the scoring engine. A non-affiliate product can rank above an affiliate product. The engine can also recommend buying nothing.
4. Sensitive and regulated workflows
A high Tool Fit score is not a compliance certification. Businesses handling regulated, financial, health, legal, employment, payment, or other sensitive data must independently verify security, privacy, retention, contractual, and regulatory requirements. The engine does not award extra points merely because a vendor markets itself as "compliant."
5. Pricing and product claims
Software changes constantly. Our structured tool records use broad pricing bands for the engine. Decision pages should separately verify current prices, plan limitations, integration claims, and material product changes and state the date checked. The cost calculator is a planning benchmark rather than a quote.
6. Editorial updates
When a tool changes pricing, capabilities, ownership, availability, or affiliate terms, the editorial record can change without changing the underlying scoring principle. Material methodology changes should be documented here rather than quietly changing how scores work.