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PartnerStack among Y Combinator companies

PartnerStack was detected on 5 of 5,388 crawled Y Combinator company websites, a share of 0.1%. Crawled 4 September 2026.

  • 5running PartnerStack
  • 0.1%share
  • 5,388crawled
  • 9columns

One CSV, all 5 Y Combinator companies, one-time.

Card payment through Stripe. The download link opens right after payment and stays valid. Questions: hello@installmap.com

installmap-yc-partnerstack.csv5 rows, 9 columns

DomainNameBatch
guesty.comGuestyWinter 2014
close.comCloseWinter 2011
treble.aitreble.aiSummer 2019
explo.coExploWinter 2020
myvr.comMyVRWinter 2012

5 of the 5 rows, 3 of the 9 columns.

PartnerStack runs on these Y Combinator companies

  • Guesty
  • Close
  • treble.ai
  • Explo
  • MyVR

5 of 5, ordered by team size, largest first. The CSV has all 5.

PartnerStack across the groups

GroupCrawledRunning PartnerStackShare
Inc 5000 (2026) 4,888 7 0.1%
Y Combinator companies 5,388 5 0.1%
Fortune 500 472 n/a n/a
Unicorns 1,000 6 0.6%
SaaS companies 8,048 n/a n/a
Tranco top 10,000 1,572 <5 <5

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.

Software used by Y Combinator companies · Affiliate and Referral across all groups · PartnerStack across every group and the wider sample

PartnerStack share of crawled company websites, by groupInc 5000 (2026)0.1%Y Combinator companies0.1%Fortune 500n/aUnicorns0.6%SaaS companiesn/aTranco top 10,0000.1%
PartnerStack share of crawled company websites, by group

Source: Installmap crawl, 4 September 2026

Badge

PartnerStack runs on 5 of 5,388 crawled YC companies (0.1%)InstallmapUsed by 5 YC companies
<a href="https://installmap.com/groups/yc/partnerstack"><img src="https://installmap.com/badges/yc/partnerstack.svg" alt="PartnerStack runs on 5 of 5,388 crawled YC companies (0.1%)"></a>
[![PartnerStack runs on 5 of 5,388 crawled YC companies (0.1%)](https://installmap.com/badges/yc/partnerstack.svg)](https://installmap.com/groups/yc/partnerstack)

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

Questions

How many Y Combinator companies use PartnerStack?

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 PartnerStack?

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 PartnerStack without it showing there is not counted. Method.

Cite this

Installmap, PartnerStack among Y Combinator companies, crawl of 4 September 2026, https://installmap.com/groups/yc/partnerstack.

Canonical URL
https://installmap.com/groups/yc/partnerstack
Denominator
5 of 5,388 crawled Y Combinator company websites, a share of 0.1%

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Other Affiliate and Referral tools in this group