# Software stack by company size

These files hold the tool counts behind the Installmap report "The stack ladder: what companies run at 10, 50, 200, 1,000 and 10,000 people". Each row covers one of 12 tool categories in one of five company-size rungs: Y Combinator companies with 1-10, 11-50, 51-200 and 201-1000 staff, and the Fortune 500 as 1000+. Counts come from one rendered crawl of each company's homepage in September 2026. See METHOD.md for how rows were counted and dropped.

## leaders_by_rung.csv

- `category`: Installmap fingerprint category
- `rung`: company-size rung (1-10, 11-50, 51-200, 201-1000, 1000+)
- `n`: scored homepages in the rung
- `any_in_category_n`: homepages with at least one tool in the category
- `any_in_category_pct`: that count as a share of `n`
- `rank`: position of the tool within the category and rung
- `tool`: tool name
- `slug`: Installmap tool slug
- `count`: homepages where the tool was detected
- `pct`: `count` as a share of `n`

## category_any_by_rung.csv

- `category`: Installmap fingerprint category
- `rung`: company-size rung
- `n`: scored homepages in the rung
- `any_n`: homepages with at least one tool in the category
- `any_pct`: `any_n` as a share of `n`

## category_any_by_rung_2019plus.csv

The same measure for Y Combinator companies from the 2019-2026 batches only, used to check that the size ladder does not come from company age. The Fortune 500 rung is not in this file.

- `category`, `rung`, `n`, `any_n`, `any_pct`: as in category_any_by_rung.csv
- `leader`, `leader_n`, `leader_pct`: the most common tool in the category and rung
- `second`, `second_n`, `second_pct`: the second most common tool

## Cite

Installmap Research, "The stack ladder: what companies run at 10, 50, 200, 1,000 and 10,000 people", installmap.com, 2026-09-27, https://installmap.com/research/software-stack-by-company-size

Licence: CC BY 4.0