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Klaviyo among Y Combinator companies

Klaviyo was detected on 45 of 5,386 crawled Y Combinator company websites, a share of 0.8%.

GroupCrawledRunning KlaviyoShare
Inc 5000 (2026) 4,885 326 6.7%
Y Combinator companies 5,386 45 0.8%
Fortune 500 472 n/a n/a
Unicorns 1,000 19 1.9%

5,386 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, 144 from a plain fetch only, and 747 returned no usable record. Company list: Y Combinator company directory. Rank 4 of the 5 CRM and Marketing Automation tools published for this group.

Software used by Y Combinator companies · CRM and Marketing Automation across all four groups · Klaviyo across every group and the wider sample

Klaviyo share of crawled company websites, by groupInc 5000 (2026)6.7%Y Combinator companies0.8%Fortune 500n/aUnicorns1.9%
Klaviyo share of crawled company websites, by group

Badge

Klaviyo runs on 0.8% of Y Combinator companies, 45 of 5,386 crawled companiesInstallmapUsed by 0.8% of Y Combinator companies
<a href="https://installmap.com/groups/yc/klaviyo"><img src="https://installmap.com/badges/yc/klaviyo.svg" alt="Klaviyo runs on 0.8% of Y Combinator companies, 45 of 5,386 crawled companies"></a>
[![Klaviyo runs on 0.8% of Y Combinator companies, 45 of 5,386 crawled companies](https://installmap.com/badges/yc/klaviyo.svg)](https://installmap.com/groups/yc/klaviyo)

Badge URL: https://installmap.com/badges/yc/klaviyo.svg · all badges.

Cite

Klaviyo was detected on 45 of 5,386 crawled Y Combinator company websites (0.8%). Installmap, 4 September 2026, https://installmap.com/groups/yc/klaviyo.

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