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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%.

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. <5 means fewer than 5 crawled domains in that group. 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 groups · Klaviyo across every group and the wider sample

Klaviyo runs on these Y Combinator companies

• Function of Beauty
• Tempo
• Flaviar
• Cratejoy
• Shoptiques
• SOUNDBOKS
• Juicy Marbles
• Proven Group
• MilkRun
• Legacy
• Gainful
• The Flex Company
• Underground Cellar
• ZBiotics
• LUS Brands
• twoplus fertility
• NaturAll Club
• Pocket
• Polymath Robotics
• Locale

20 of 45, ordered by team size, largest first.

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

[![Klaviyo runs on 45 of 5,386 crawled YC companies (0.8%)](https://installmap.com/badges/yc/klaviyo.svg)](https://installmap.com/groups/yc/klaviyo)

Other CRM and Marketing Automation tools in this group

• HubSpot 11.2%
• Marketo 1.2%
• Mailchimp 0.9%
• Customer.io 0.3%
• ActiveCampaign 0.3%
• Salesforce Pardot 0.2%
• Salesforce Web-to-Lead 0.1%
• Zoho CRM Forms 0.1%