Home / Groups / Y Combinator companies / Yoast SEO
Yoast SEO among Y Combinator companies
Yoast SEO was detected on 5 of 5,388 crawled Y Combinator company websites, a share of 0.1%. Crawled 4 September 2026.
- 5running Yoast SEO
- 0.1%share
- 5,388crawled
- 9columns
installmap-yc-yoast-seo.csv5 rows, 9 columns
| Domain | Name | Batch |
|---|---|---|
| simplelegal.com | SimpleLegal | Summer 2013 |
| soylent.com | Soylent | Summer 2012 |
| shelfengine.com | Shelf Engine | Summer 2018 |
| sketchdeck.com | SketchDeck | Winter 2014 |
| simplylisted.com | SimplyListed | Winter 2011 |
5 of the 5 rows, 3 of the 9 columns.
Yoast SEO runs on these Y Combinator companies
- SimpleLegal
- Soylent
- Shelf Engine
- SketchDeck
- SimplyListed
5 of 5, ordered by team size, largest first. The CSV has all 5.
Installmap's list of all 3,286 companies using Yoast SEO holds 31 Y Combinator companies, with industry, employees, country and up to three named contacts per company: Companies using Yoast SEO, $99 one-time.
Yoast SEO across the groups
| Group | Crawled | Running Yoast SEO | Share |
|---|---|---|---|
| Inc 5000 (2026) | 4,888 | 1,633 | 33.4% |
| Y Combinator companies | 5,388 | 5 | 0.1% |
| Fortune 500 | 472 | n/a | n/a |
| Unicorns | 1,000 | n/a | n/a |
| SaaS companies | 8,048 | 1,668 | 20.7% |
| Tranco top 10,000 | 1,572 | n/a | n/a |
5,388 of 6,133 Y Combinator domains returned a usable record and form the denominator. 5,242 were counted from a rendered homepage crawl on 4 September 2026, 146 from a plain fetch only, and 745 returned no usable record. Email hosting and email security are read from each domain's MX and SPF records, for the same domains. Company list: Y Combinator company directory. <5 means fewer than 5 crawled domains in that group. Rank 1 of the 1 SEO tools published for this group.
Software used by Y Combinator companies · SEO across all groups · Yoast SEO across every group and the wider sample
Source: Installmap crawl, 4 September 2026
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Questions
How many Y Combinator companies use Yoast SEO?
5 of the 5,388 Y Combinator company websites we crawled on 4 September 2026, a share of 0.1%.
What does a row hold?
domain, name, batch, year, industry, subindustry, status, team size, location. One row per company domain, 9 columns.
What do I get after paying?
One UTF-8 CSV with a header row and all 5 rows. The download link opens right after the card payment and stays valid, so you can download again later.
How does the free sample work?
Enter your email above and we send a link to a CSV of 5 rows from this list with all 9 columns.
Is this every Y Combinator company using Yoast SEO?
No. 5,388 of 6,133 Y Combinator domains returned a usable record and form the denominator. 5,242 were counted from a rendered homepage crawl on 4 September 2026, 146 from a plain fetch only, and 745 returned no usable record. Email hosting and email security are read from each domain's MX and SPF records, for the same domains. Company list: Y Combinator company directory. A company that uses Yoast SEO without it showing there is not counted. Method.
Cite this
Installmap, Yoast SEO among Y Combinator companies, crawl of 4 September 2026, https://installmap.com/groups/yc/yoast-seo.