Installmap vs TheirStack
What each one is
Installmap publishes the share of each list of companies that runs each piece of software. The lists crawled as sets are the Inc 5000, Y Combinator companies, the Fortune 500, unicorns, SaaS companies and the Tranco top 10,000. Each company homepage is loaded in a headless browser and matched against known fingerprints for analytics, CRM and marketing automation, advertising, chat, e-commerce, consent and hosting tools. The denominators, the crawl dates and the method are published.
TheirStack (theirstack.com): A search product over job postings and company technographics. You search companies by the technologies they use and what they hire for, then reveal or export the matching companies.
Row by row
| Installmap | TheirStack | |
|---|---|---|
| Named company lists crawled | Inc 5000 4,886 of 4,929 fetched; Y Combinator 5,386 of 6,133; Fortune 500 472 of 472 fetched; Unicorns 1,000 of 1,000 fetched; SaaS 8,173 of 9,008 fetched; Tranco 1,572 of 1,573 fetched. | check |
| Share printed with its base and date | Yes. Every share prints the count, the crawled denominator and the crawl date. 21,489 domains returned a usable record across the 6 lists. | Public technology pages state a total company count, for example 228,936 on the HubSpot page, with 10 rows shown. No base sits beside it. |
| Same tool across every list | Yes. Every tool page shows its count and share in each of the 6 lists, from one crawl run with one detector. | check |
| Cuts by industry, size and country | Yes. Industry, employee size band and country. Segments under 20 crawled domains read n/a. | Public technology pages carry country and region breakdowns. Industry and employee size appear per company row, not as a published cut. |
| Detection fingerprints and categories | 448 fingerprints across 26 categories: script hosts, generator meta tags, response headers, form endpoints and payment iframe hosts. | 33k technologies, stated on the homepage and the pricing page. Categories are not counted. |
| Rendered against plain fetch recall | Yes. Plain fetches find 35.8% of what the rendered crawl finds on the 3,569 Inc 5000 domains with both records: 13,100 installs against 36,546. | check |
| Failure funnel published | Yes. Each list prints its own attrition above, and the method page prints every step of the segment sample from 30,000 domains selected to 8,291 usable records, with 17 named failure reasons and a count each. | check |
| Publishing floor per cell | Yes. A segment under 20 crawled domains prints n/a. A tool under 5 installs in a list gets no share. | check |
| Free to read and to cite | Yes. Every page that publishes a number carries a cite block with the number, the denominator and the crawl date. | check |
| Lookup of a single site | No. The unit is a named list of companies, not one domain. | check |
| Historical records | No. One crawl per list, dated 4 September 2026. | check |
| A list of companies to take away | No. The site publishes shares of a list, not the companies in it. A research post carries the CSV behind that post. | One company credit reveals or exports one company, viewable for 90 days. 1,000 credits for $109 up to 200,000 for $999. |
| Contact data | No. No person, email address or phone number is held. | check |
| Price | Free to read. Nothing is for sale. | One-time company credits from 1,000 for $109 up to 200,000 for $999. Monthly API subscriptions from 1,500 credits at $49 a month. |
"check" marks a cell TheirStack does not state on its public pages.
What Installmap answers
- What share of a list runs HubSpot: HubSpot is on 25.6% of the 4,886 crawled Inc 5000 domains, against 2.5% of the 472 crawled Fortune 500 domains.
- How far consent tooling has reached the Fortune 500: OneTrust is on 44.9% of the 472 crawled Fortune 500 domains.
- Which analytics tool the newest companies pick: PostHog is on 12.8% of the 5,386 crawled Y Combinator domains.
What TheirStack carries that Installmap does not
- Job postings as a signal, stated as 238 million from over 195 countries.
- A public count and a country breakdown on each technology page.
- The companies themselves, one credit each.
Which one for which question
| Question | Answered by |
|---|---|
| What share of the Inc 5000 runs a given tool, and what is the base | Installmap, 4,886 crawled domains |
| Whether that share holds across 6 different lists | Installmap |
| How the number was produced, and what failed | Installmap, method page |
| Which companies are hiring for a technology | TheirStack |
| Which named companies use a tool | TheirStack |
Notes on TheirStack
The pricing page states 33k tracked technologies and 237 million job postings on the homepage.
The API credit calculator weights a job at 1 credit and a company or technographics lookup at 3 credits.
Plans state no seat limit: unlimited pages and team members.
The pricing page states a free trial covering both credit types, but publishes no free credit count.
How TheirStack was read
The TheirStack column comes from theirstack.com/en/pricing and theirstack.com/en, read on 3 September 2026 and 5 September 2026 with no account. A cell reads "check" where the figure is not on those pages. The Installmap column is generated from the crawl when the page is served; the method page carries the sample, the funnel and the failure counts.