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~/dnsniffer/issuers/digicert·rank #4

▸ How many domains does DigiCert secure?

9,551,684

active domains whose current TLS certificate was issued by DigiCert, as of - 4.02% of all attributed domains.

# rank #4 of all CAs# all records held: 16,245,584# subdomains: 28,251# intermediates: 115# United States
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~/issuers/digicert/history·active domains
9,551,684
domains secured by DigiCert on 2026-10-15 · ▲ +6,264,627 (+190.58%) since 2025-06-30
2.27M4.89M7.50M10.12M12.73M2025-06-30: 3,287,057 active2025-07-31: 8,705,277 active2025-08-31: 8,792,165 active2025-09-30: 8,795,598 active2025-10-31: 8,795,598 active2025-11-30: 8,795,598 active2025-12-31: 10,371,683 active2026-01-31: 10,773,235 active2026-02-28: 10,773,235 active2026-03-31: 10,773,235 active2026-04-30: 11,537,386 active2026-05-31: 11,603,938 active2026-06-30: 11,665,067 active2026-07-31: 11,721,002 active2026-08-31: 11,720,300 active2026-09-01: 11,696,495 active2026-09-02: 11,665,598 active2026-09-03: 9,864,041 active2026-09-04: 9,654,489 active2026-09-05: 9,635,680 active2026-09-06: 9,577,669 active2026-09-07: 9,371,305 active2026-09-08: 9,364,342 active2026-09-09: 9,364,499 active2026-09-10: 9,359,295 active2026-09-11: 9,363,486 active2026-09-12: 9,361,507 active2026-09-13: 9,355,427 active2026-09-14: 9,341,702 active2026-09-15: 9,331,400 active2026-09-16: 9,333,511 active2026-09-17: 9,319,391 active2026-09-18: 9,294,200 active2026-09-19: 9,288,838 active2026-09-20: 9,277,940 active2026-09-21: 9,271,054 active2026-09-22: 9,286,995 active2026-09-23: 9,285,082 active2026-09-24: 9,705,422 active2026-09-25: 9,689,570 active2026-09-26: 9,685,218 active2026-09-27: 9,678,700 active2026-09-28: 9,675,571 active2026-09-29: 9,680,089 active2026-09-30: 9,676,059 active2026-10-01: 9,671,316 active2026-10-02: 9,660,404 active2026-10-03: 9,653,411 active2026-10-04: 9,642,117 active2026-10-05: 9,630,410 active2026-10-06: 9,622,462 active2026-10-07: 9,616,674 active2026-10-08: 9,613,207 active2026-10-09: 9,608,365 active2026-10-10: 9,601,856 active2026-10-11: 9,591,352 active2026-10-12: 9,581,922 active2026-10-13: 9,571,752 active2026-10-14: 9,571,386 active2026-10-15: 9,551,684 active2025-06-302026-10-15

# y-axis starts at 2.27M, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.

# change over time
30 days
▲ +2.36%
+220,284 domains
90 days
▼ -18.12%
-2,113,383 domains
1 year
▲ +8.60%
+756,086 domains
# intermediate CAs
Intermediate certificate authorities operating under DigiCert, with the number of active domains each currently secures.
intermediatecountrydomains
Encryption Everywhere DV TLS CA - G2United States8,533,002
GeoTrust TLS RSA CA G1United States448,136
RapidSSL TLS RSA CA G1United States312,160
DigiCert Global G2 TLS RSA SHA256 2020 CA1United States115,833
Encryption Everywhere G3 TLS ECC P384 SHA384 2023 CA1-36,444
Thawte TLS RSA CA G1United States33,309
GeoTrust Global TLS RSA4096 SHA256 2022 CA1United States31,669
GeoTrust G2 TLS CN RSA4096 SHA256 2022 CA1United States14,240
DigiCert EV RSA CA G2United States8,972
DigiCert Secure Site OV G2 TLS CN RSA4096 SHA256 2022 CA1United States2,543
GeoTrust EV RSA CA G2United States2,437
DigiCert TLS RSA SHA256 2020 CA1United States2,301
Encryption Everywhere DV TLS CA - G1United States2,262
RapidSSL Global TLS RSA4096 SHA256 2022 CA1United States2,040
Thawte EV RSA CA G2United States1,174
DigiCert Basic OV G2 TLS CN RSA4096 SHA256 2022 CA1United States790
DigiCert G5 TLS RSA4096 SHA384 2021 CA1United States577
DigiCert Secure Site Pro G2 TLS CN RSA4096 SHA256 2022 CA1United States412
RapidSSL G5 TLS RSA4096 SHA384 2022 CA1United States405
DigiCert QV TLS ICA G1United States339
GeoTrust G5 TLS RSA4096 SHA384 2022 CA1United States320
RapidSSL TLS ECC CA G1United States317
DigiCert Global G3 TLS ECC SHA384 2020 CA1United States290
GeoTrust CN RSA CA G1United States250
Thawte RSA CA 2018United States211
GeoTrust RSA CA 2018United States201
Thawte G5 TLS RSA4096 SHA384 2022 CA1United States148
GeoTrust EV G2 TLS CN RSA4096 SHA256 2022 CA1United States109
DigiCert Secure Site Pro EV G2 TLS CN RSA4096 SHA256 2022 CA1United States90
DigiCert Global CA G2United States73
DigiCert SHA2 Extended Validation Server CAUnited States64
DigiCert Secure Site EV G2 TLS CN RSA4096 SHA256 2022 CA1United States61
DigiCert Basic EV G2 TLS CN RSA4096 SHA256 2022 CA1United States59
GeoTrust RSA CN CA G3United States57
DigiCert Basic RSA CN CA G2United States42
DigiCert SHA2 Secure Server CAUnited States36
GeoTrust TLS ECC CA G1United States36
Thawte TLS ECC CA G1United States36
RapidSSL ECC CA 2018United States23
Secure Site CA G2United States22
DigiCert Trusted G4 TLS RSA4096 SHA384 2025 CA1United States21
GeoTrust EV RSA CA 2018United States20
GeoTrust RSA CN CA G2United States18
DigiCert G5 TLS ECC SHA384 2021 CA1United States15
DigiCert QV EV TLS ICA G1United States10
Thawte EV RSA CA 2018United States10
DigiCert Global G2 TLS EE+ RSA4096 SHA256 2022 CA1United States9
DigiCert Assured ID G2 TLS RSA4096 SHA256 2022 CA1United States8
DigiCert Secure Site CN CA G3United States8
GeoTrust EV CN RSA G1United States6
Thawte G5 TLS ECC P-384 SHA384 2022 CA2United States5
RapidSSL RSA CA 2018United States5
GeoTrust G5 TLS ECC P-384 SHA384 2022 CA2United States4
Encryption Everywhere G5 TLS RSA4096 SHA384 2022 CA1United States4
Secure Site Extended Validation CA G2United States4
GeoTrust EV RSA CN CA G2United States4
Secure Site Pro Extended Validation CA G2United States4
Secure Site Pro CA G2United States4
DigiCert Assured ID CA G2United States4
DigiCert Basic EV RSA CN CA G2United States3
DigiCert Basic OV G5 TLS CN RSA4096 SHA384 2022 CA1United States3
DigiCert Secure Site Pro CN CA G3United States3
DigiCert Trusted G4 TLS RSA4096 SHA256 2025 CA1United States2
DigiCert Secure Site OV G5 TLS CN RSA4096 SHA384 2022 CA1United States2
GeoTrust G5 TLS CN RSA4096 SHA384 2022 CA1United States2
DigiCert Trusted G4 TLS RSA SHA384 2020 CA1United States2
DigiCert Assured ID TLS RSA4096 SHA256 2022 CA1United States2
DigiCert CN RSA CA G1United States2
GeoTrust EV ECC CA 2018United States1
Thawte ECC CA 2018United States1
DigiCert Assured ID G3 TLS ECC384 SHA384 2022 CA1United States1
DigiCert TLS ICA Thawte PCA 2021United States1
DigiCert TLS Hybrid ECC SHA384 2020 CA1United States1
DigiCert QuoVadis TLS ICA QV Root CA 3United States1
DigiCert Secure Site Pro G5 TLS CN RSA4096 SHA384 2022 CA1United States1
DigiCert Secure Site EV G5 TLS CN RSA4096 SHA384 2022 CA1United States1
GeoTrust ECC CA 2018United States1
DigiCert Cloud Services CA-1United States1
DigiCert High Assurance CA-3cUnited States0
DigiCert EV Server CA G4United States0
DigiCert Secure Site Pro G3 TLS CN ECC P-384 SHA384 2022 CA1United States0
DigiCert QuoVadis TLS ICA QV Root CA 3 G3United States0
Thawte EV ECC CA 2018United States0
DigiCert High Assurance CA-3bUnited States0
DigiCert TLS ICA PCA-G5 2021United States0
DigiCert Assured ID Grid TLS RSA2048 SHA256 2022 CA1United States0
DigiCert High Assurance TLS RSA SHA256 2020 CA1United States0
DigiCert Secure Site OV G3 TLS CN ECC P-384 SHA384 2022 CA1United States0
Secure Site Pro CAUnited States0
DigiCert QuoVadis TLS ICA QV Root CA 1 G3United States0
GeoTrust G3 TLS CN ECC P-384 SHA384 2022 CA1United States0
DigiCert G5 RSA4096 SHA384 2021 CA1United States0
DigiCert G5 ECC SHA384 2021 CA1United States0
Secure Site Extended Validation CAUnited States0
DigiCert Baltimore CA-2 G2United States0
DigiCert Secure Site Pro EV G5 TLS CN RSA4096 SHA384 2022 CA1United States0
RapidSSL G5 TLS ECC P-384 SHA384 2022 CA1United States0
Secure Site CAUnited States0
DigiCert Omni TLS RSA4096 SHA256 2022 CA1United States0
DigiCert Basic OV G5 TLS CN ECC P-384 SHA384 2022 CA1United States0
DigiCert Assured ID G2 TLS RSA4096 SHA256 2026 CA2United States0
DigiCert G6 TLS ECC P384 SHA384 2026 CA1United States0
DigiCert G6 TLS RSA4096 SHA384 2026 CA1United States0
DigiCert Basic OV G3 TLS CN ECC P-384 SHA384 2022 CA1United States0
DigiCert Secure Site Pro ECC CN CA G3United States0
Secure Site Pro ECC CA G2United States0
DigiCert Baltimore TLS RSA SHA256 2020 CA1United States0
DigiCert TLS ICA Thawte PCA-G3 2021United States0
DigiCert QuoVadis TLS ICA QuoVadis Root CA 2United States0
DigiCert Secure Site Pro EV CN CA G3United States0
DigiCert Trusted Server CA G4United States0
DigiCert Secure Site ECC CN CA G3United States0
DigiCert Secure Site Pro EV G3 TLS CN ECC P-384 SHA384 2022 CA1United States0
DigiCert Secure Site EV CN CA G3United States0
DigiCert CN RSA EV CA G1United States0
# faq
? How many domains does DigiCert secure?
DigiCert is the certificate authority for 9,551,684 active domains as of October 15, 2026 - 4.02% of every domain DNSniffer can attribute to an issuer.
? Is DigiCert gaining or losing market share?
The number of domains secured by DigiCert has grown by 8.60% over the last year (+756,086 domains).
? Which intermediate CAs does DigiCert sign from?
We have seen 115 intermediates under DigiCert, the busiest being “Encryption Everywhere DV TLS CA - G2” with 8,533,002 domains. The full list, with per-intermediate counts, is on this page.
? Where does this number come from?
DNSniffer ingests Certificate Transparency logs continuously and records the issuer of the most recent certificate seen for each domain, then snapshots the per-issuer count once a day. It measures how much of the live web a CA currently secures, not how many certificates it has issued over its lifetime.
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