Home / Groups / Y Combinator companies / Elfsight
Elfsight among Y Combinator companies
Elfsight was detected on 15 of 5,388 crawled Y Combinator company websites, a share of 0.3%. Crawled 4 September 2026.
- 15running Elfsight
- 0.3%share
- 5,388crawled
- 9columns
installmap-yc-elfsight.csv15 rows, 9 columns
| Domain | Name | Batch |
|---|---|---|
| zeitview.com | Zeitview | Winter 2015 |
| moradauno.com.mx | Morada Uno | Winter 2021 |
| numida.com | Numida | Winter 2022 |
| tavus.io | Tavus | Summer 2021 |
| gogograndparent.com | GoGoGrandparent | Summer 2016 |
| payflow.es | Payflow | Summer 2021 |
| legionhealth.com | Legion Health | Summer 2021 |
| getcone.io | Cone | Summer 2022 |
8 of the 15 rows, 3 of the 9 columns.
Elfsight runs on these Y Combinator companies
- Zeitview
- Morada Uno
- Numida
- Tavus
- GoGoGrandparent
- Payflow
- Legion Health
- Cone
- Sleep Reset
- Jupe
- Gather
- Rinse
- Chorus Sleep
- rift
- Eclipse Foods
15 of 15, ordered by team size, largest first. The CSV has all 15.
Elfsight across the groups
| Group | Crawled | Running Elfsight | Share |
|---|---|---|---|
| Inc 5000 (2026) | 4,888 | 97 | 2.0% |
| Y Combinator companies | 5,388 | 15 | 0.3% |
| Fortune 500 | 472 | <5 | <5 |
| Unicorns | 1,000 | <5 | <5 |
| SaaS companies | 8,048 | 22 | 0.3% |
| 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 2 of the 5 Popups and Widgets tools published for this group.
Software used by Y Combinator companies · Popups and Widgets across all groups · Elfsight across every group and the wider sample
Source: Installmap crawl, 4 September 2026
Badge
<a href="https://installmap.com/groups/yc/elfsight"><img src="https://installmap.com/badges/yc/elfsight.svg" alt="Elfsight runs on 15 of 5,388 crawled YC companies (0.3%)"></a>
[](https://installmap.com/groups/yc/elfsight)
Badge URL: https://installmap.com/badges/yc/elfsight.svg · all badges.
Questions
How many Y Combinator companies use Elfsight?
15 of the 5,388 Y Combinator company websites we crawled on 4 September 2026, a share of 0.3%.
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 15 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 15 rows from this list with all 9 columns.
Is this every Y Combinator company using Elfsight?
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 Elfsight without it showing there is not counted. Method.
Cite this
Installmap, Elfsight among Y Combinator companies, crawl of 4 September 2026, https://installmap.com/groups/yc/elfsight.