Companies Using DigiCert

DigiCert's site seal is the badge DigiCert supplies with its premium certificates, and our October 2026 crawl finds it working on 1,766 domains. A domain counts when a page loads DigiCert's seal script from seal.digicert.com and DigiCert still serves the seal for that site. 966 of the domains match a company, and DigiCert ranks 10th of 16 in SSL/TLS Certificates with 0.82%.

Four seals in ten came back blank

The seal script reads a short tag from the page and asks DigiCert for an image. DigiCert's troubleshooting page says each seal is tied to one certificate order and stops appearing when the certificate or contract expires. On 15 October 2026 I read the tag on every page we could and requested the image. For 705 of the 1,588 seals we tested, 44.40%, DigiCert returned a 159-byte transparent image instead of a seal of about 4 KB. Visitors see an empty space.

The certificates show who left. Of the 705 blank seals, 160 sat on sites serving a Google Trust Services certificate, 155 on Let's Encrypt and 66 on Sectigo. We removed the 497 blank seals on sites with another CA's certificate or none we could read, plus 5 domains that now redirect to a parking page. The other 208 blank seals sit on sites still serving a DigiCert certificate, and DigiCert's documentation explains why that happens: a certificate on a new order needs new seal code. Those stay in.

"The seal is meant to prove the certificate is current. On four pages in ten it proved the opposite, and most of those sites had already moved to another CA." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: a blank DigiCert seal on a Let's Encrypt or Google certificate marks a buyer who stopped paying for premium validation. CA resellers and certificate-management vendors can work that list.

The chart, and the forwarding addresses

The chart has one point, 1,766 domains in October 2026, because the blank-seal test was run once; our earlier monthly totals counted every seal script. The set of domains we crawl also turns over every month and our detection signals widen, so even the old totals weren't a like-for-like series. One more thing inflates the count. 323 of the 1,766 domains belong to 14 companies: United Site Services has 84 and the next three 67, 67 and 31, mostly retired brand names and look-alike domains forwarding to the company's main site, which carries the seal.

Sales signal: count companies, not domains, when you size this list. The top four alone hold 249 domains, 14.10% of the count.

Who shows it

DigiCert's seal users are bigger and older than the usual badge crowd. 40.62% of matched companies with a known size have 1 to 10 staff, against 61.51% on Sectigo TrustLogo's profile, and 53 have more than 1,000. 53.28% were founded before 2000. Retail leads the industries at 12.36%, and banking, insurance and financial services add up to 10.82%. The seal sits where money or personal data changes hands: DFW Airport, TruStage, Capitol Federal, ICBC Argentina, TaxAct, TaxSlayer and the Las Vegas Valley Water District's account site.

Sales signal: these buyers pay for organisation-validated certificates and say so on the page. Payment-page security, fraud and compliance tools fit them better than website builders do.

Japan, and the GeoTrust brand

Japan has 96 matched companies, second only to the United States (514) and more than twice the United Kingdom's 43. Xserver, a Japanese host, runs 1.53% of the domains. The certificates hold the other surprise. On 15 October, 950 of the 1,766 domains served a certificate issued by DigiCert, and 433 of those were GeoTrust-branded, against 386 DigiCert-branded, with Encryption Everywhere (64), Thawte (48) and RapidSSL (19) making up the rest. DigiCert owns those brands: it completed its purchase of Symantec's website security business on 31 October 2017, and geotrust.com carries a DigiCert copyright. GeoTrust's own seal is dead, because its seal hostnames no longer resolve, so these 433 sites show DigiCert's badge over a GeoTrust certificate.

"More DigiCert seal sites run a GeoTrust certificate than a DigiCert-branded one. The badge says DigiCert; the certificate often says GeoTrust, and both come from the same company." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker.io

Sales signal: Japan is a real pocket of DigiCert seal users, and sellers with Japanese coverage should filter for it. For everyone else, treat GeoTrust and DigiCert certificates as one account.

Stack, price and owners

Across the 1,766 domains, Google Analytics runs on 80.86% and Cloudflare sits in front of 43.04%. OneTrust is on 11.72%, more than three times the leading consent tool on Sectigo TrustLogo's domains. WordPress runs only 20.61%, and Adobe Analytics (1.42%) and Adobe Experience Manager (0.85%) mark the enterprise tail. DigiCert's comparison page lists base prices from $218 (Basic OV) to $1,495 (Secure Site Pro EV), with the Smart Seal included on Secure Site and Secure Site Pro. By certificates issued, DigiCert held 0.9% of final certificates in Q3 2026, per Cloudflare Radar data in our certificate authority market share report, and Clearlake Capital and TA Associates completed their investment in DigiCert in October 2019.

Sales signal: a OneTrust banner on one DigiCert site in nine points to companies with a privacy function. Pitch a team, not a sole owner.

Key takeaways

1. 1,766 domains after 497 blank seals on sites without a DigiCert certificate and 5 parked domains were removed; 208 blank seals on DigiCert certificates stay in.

2. 44.40% of the seals we could test came back blank.

3. 323 of the 1,766 domains belong to 14 companies, so count companies before you size the market.

4. 433 seal sites run GeoTrust-branded DigiCert certificates, and GeoTrust's own seal no longer loads.

How to use this list

Filter on industry and country, collapse the forwarding domains, and load the page before you call to see whether the seal still shows. For the full list of 1,766 DigiCert domains with company, size and stack data, explore TechnologyChecker.io.