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Proofpoint among Y Combinator companies

Proofpoint was detected on 43 of 5,386 crawled Y Combinator company websites, a share of 0.8%.

Read from each domain's MX record, and for domains behind an email gateway from its SPF record, not from the homepage.

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. 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 4 Email Security tools published for this group.

Software used by Y Combinator companies · Email Security across all groups

<a href="https://installmap.com/groups/yc/proofpoint"><img src="https://installmap.com/badges/yc/proofpoint.svg" alt="Proofpoint is the most detected Email Security tool among Y Combinator companies: 43 of 5,386 crawled YC companies (0.8%)"></a>

[![Proofpoint is the most detected Email Security tool among Y Combinator companies: 43 of 5,386 crawled YC companies (0.8%)](https://installmap.com/badges/yc/proofpoint.svg)](https://installmap.com/groups/yc/proofpoint)

Other Email Security tools in this group

• Mimecast 0.3%
• Cloudflare Email Security 0.1%