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~/dnsniffer/issuers·按保护的域名数排序

▸ 证书颁发机构市场份额

全部证书颁发机构按其签发当前 TLS 证书的活跃域名数量排序，统计日期为 。 Let's Encrypt 以 125,896,799 个域名居首 - 占我们能归属到颁发机构的 237,493,852 个域名的 53.01%。

增长最快 →下降最快 →TLD 排行 → 下载数据
# 市场份额 · 30 天趋势 · 90 天迷你图

按保护域名数排列的 CA

截至 2026年10月15日 按保护的活跃域名数排序的证书颁发机构，含市场份额、30 天变化与 90 天趋势线。
#颁发机构保护的域名占比30 天90 天趋势中间证书
1▸ Let's Encrypt125,896,79953.01%▲ +2.97%6
2▸ GoDaddy63,378,44826.69%▲ +5.06%4
3▸ Google Trust Services23,821,46310.03%▲ +3.39%6
4▸ DigiCert9,551,6844.02%▲ +2.36%80
5▸ Sectigo5,605,1622.36%▲ +5.49%12
6▸ Amazon2,564,8771.08%▲ +4.91%26
7▸ ZeroSSL1,883,7820.79%▲ +0.44%2
8▸ Actalis1,050,3980.44%▼ -0.86%7
9▸ TrustAsia Technologies947,4270.40%▲ +9.56%18
10▸ GlobalSign686,2580.29%▲ +10.73%58
11▸ SSL.com663,7550.28%▲ +38.98%17
12▸ Starfield Technologies196,6250.08%▲ +7.54%4
13▸ Certum159,6330.07%▲ +7.94%4
14▸ home.pl143,9770.06%▼ -2.23%3
15▸ cPanel64,8310.03%▲ +34.28%5
16▸ Certainly61,2700.03%▲ +2.61%1
17▸ home.pl sp. z o.o56,2430.02%▲ +103.54%2
18▸ Japan Registry Services52,5290.02%▲ +12.91%2
19▸ Proofpoint50,3100.02%▲ +9.19%1
20▸ GoGetSSL49,4170.02%▲ +13.33%6
21▸ cyber_Folks45,8640.02%▲ +12.91%2
22▸ Network Solutions43,4880.02%▼ -18.88%6
23▸ WoTrus CA43,3030.02%▲ +9.84%9
24▸ Xin Net Technology41,8230.02%▲ +12.01%6
25▸ Unizeto Technologies24,6660.01%▲ +25.60%2
26▸ 联通智慧安全科技有限公司23,498<0.01%▼ -6.25%24
27▸ sslTrus22,435<0.01%▲ +21.04%9
28▸ Japan Registry Services Co21,367<0.01%▼ -18.02%2
29▸ Soluciones Corporativas IP, SL19,478<0.01%▲ +9.67%1
30▸ Beijing Xinchacha Credit Management Co18,674<0.01%▼ -1.37%6
31▸ Universitaet Augsburg18,046<0.01%▼ -0.58%1
32▸ Gandi17,026<0.01%▲ +10.73%5
33▸ PerfectSSL16,908<0.01%▲ +9.09%1
34▸ Shoper16,881<0.01%▲ +12.68%1
35▸ Trust Provider12,928<0.01%▲ +16.87%2
36▸ CloudSecure11,732<0.01%▲ +5.62%6
37▸ JoySSL10,716<0.01%▲ +13.09%8
38▸ Cybertrust Japan Co10,072<0.01%▼ -12.64%2
39▸ nazwa.pl9,874<0.01%▲ +92.74%1
40▸ DNSPod9,319<0.01%▲ +9.13%6
41▸ Henan Fierce Fire Network Technology8,868<0.01%▲ +17.33%2
42▸ LH.pl Sp. z o.o8,730<0.01%▲ +25.16%2
43▸ Nijimo8,065<0.01%▲ +1.07%3
44▸ SSL2BUY EMEA5,910<0.01%▲ +15.29%3
45▸ Corporation Service Company4,766<0.01%▲ +10.73%4
46▸ SwissSign4,612<0.01%▼ -0.37%6
47▸ nazwa.pl sp. z o.o4,494<0.01%▲ +72.38%1
48▸ F54,484<0.01%▲ +97.88%1
49▸ The USERTRUST Network4,408<0.01%▲ +16.31%2
50▸ UniTrust4,174<0.01%▲ +7.03%5
51▸ Shanghai Huandu Info Tech4,074<0.01%▲ +14.12%4
52▸ Alpiro s.r.o3,921<0.01%▲ +9.83%6
53▸ Isimtescil Bilisim A.S3,872<0.01%▼ -24.09%1
54▸ ENEDIS SA3,777<0.01%▲ +14.73%1
55▸ TAIWAN-CA3,625<0.01%▲ +0.58%4
56▸ The Trustico Group3,574<0.01%▲ +13.57%5
57▸ Microsoft3,547<0.01%▲ +2.16%9
58▸ BAWAG Group3,491<0.01%▲ +15.25%1
59▸ CDW3,425<0.01%▲ +17.90%1
60▸ EUNETIC3,279<0.01%▲ +6.36%5
61▸ Certera3,175<0.01%▲ +8.55%-2
62▸ Beijing Xinchacha Credit Management3,146<0.01%▲ +3,319.57%-4
63▸ iTrusChina Co2,912<0.01%▲ +4.22%-2
64▸ Aliyun Computing Co2,774<0.01%▲ +11.50%-1
65▸ GeoSSL2,683<0.01%▲ +11.84%-3
66▸ TuringSign Global SA2,504<0.01%▲ +6.10%-2
67▸ eMudhra Technologies2,487<0.01%▲ +3.84%-6
68▸ China Financial Certification Authority2,475<0.01%▲ +3.43%-8
69▸ SECOM Trust Systems2,458<0.01%▼ -4.21%-7
70▸ Cloudflare2,423<0.01%▼ -21.69%-2
71▸ Cisco Systems2,400<0.01%▲ +4.58%-1
72▸ Soluciones Corporativas IP2,145<0.01%▲ +33.23%-1
73▸ Shanghai Electronic Certification Authority1,950<0.01%▼ -0.15%-2
74▸ Entrust1,946<0.01%▲ +6.63%-4
75▸ D-Trust1,939<0.01%▲ +16.53%-7
76▸ SECOM Trust Systems Co1,884<0.01%▲ +31.47%-2
77▸ GEANT Vereniging1,803<0.01%▲ +156.84%-3
78▸ Internet21,770<0.01%▲ +30.24%-6
79▸ DigiCert Ireland1,701<0.01%▼ -8.40%-5
80▸ Verokey1,624<0.01%▲ +9.73%-4
81▸ Apple1,469<0.01%▲ +0.34%-7
82▸ Deutsche Telekom Security1,448<0.01%▲ +7.74%-9
83▸ Genious Communications1,436<0.01%▲ +9.95%-3
84▸ Alibaba Cloud Computing1,419<0.01%▼ -2.21%-3
85▸ AutonTrust PTE1,260<0.01%▲ +47.89%-1
86▸ Vitalwerks Internet Solutions1,181<0.01%▲ +7.17%-2
87▸ Key-Systems1,044<0.01%▲ +28.26%-1
88▸ Buypass AS-9831633271,038<0.01%▲ +0.29%-3
89▸ NAVER Cloud Trust Services984<0.01%▲ +14.69%-2
90▸ Telia Company898<0.01%▲ +9.25%-2
91▸ Hongkong Post898<0.01%▲ +1.35%-2
92▸ Zhejiang Huluwa Digital Certification885<0.01%▲ +52.32%-3
93▸ Deutsche Post816<0.01%▲ +32.04%-2
94▸ Comodo Japan744<0.01%▲ +0.00%-1
95▸ CentralNic Luxembourg Sàrl742<0.01%▼ -10.28%-1
96▸ Hao Quang Viet Software Company740<0.01%▲ +1.65%-3
97▸ Leocert720<0.01%▼ -69.57%-1
98▸ TBS INTERNET719<0.01%▲ +13.77%-2
99▸ InCommon672<0.01%▼ -13.85%-1
100▸ Global Digital Cybersecurity Authority Co536<0.01%▼ -4.29%-4
101▸ Microsec533<0.01%▲ +24.24%-6
102▸ Hellenic Academic and Research Institutions CA499<0.01%▼ -16.97%-3
103▸ Chunghwa Telecom489<0.01%▼ -2.98%-1
104▸ Telia Finland Oyj390<0.01%▼ -1.52%-2
105▸ iTrust356<0.01%▲ +11.60%-3
106▸ iTrusChina296<0.01%▲ +14,700.00%-5
107▸ Izenpe292<0.01%▲ +6.96%-4
108▸ Global Digital Cybersecurity Authority272<0.01%▲ +23.64%-6
109▸ Nijimo K.K264<0.01%▲ +4.76%-3
110▸ FNMT-RCM241<0.01%▲ +265.15%-1
111▸ Zhejiang Huluwa Digital Certification Co213<0.01%▼ -23.66%-2
112▸ QuoVadis Trustlink213<0.01%▼ -34.06%-4
113▸ IdenTrust205<0.01%▲ +2.50%-3
114▸ VELO SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ205<0.01%▲ +4.06%-1
115▸ CERTSIGN SA205<0.01%▲ +17.82%-1
116▸ Sectigo (Europe) SL188<0.01%▲ +4.44%-2
117▸ ISTEC181<0.01%▼ -24.58%-1
118▸ WISeKey180<0.01%▲ +0.56%-3
119▸ EnVers Group SIA179<0.01%▲ +14.01%-1
120▸ Turing Crypto171<0.01%▼ -11.40%-1
121▸ NYA LABS143<0.01%▲ +10.00%-1
122▸ NETLOCK138<0.01%▲ +146.43%-2
123▸ NAVER BUSINESS PLATFORM120<0.01%▲ +14.29%-1
124▸ CertCloud Pte120<0.01%--1
125▸ Abitab118<0.01%▼ -21.85%-2
126▸ DHIMYOTIS117<0.01%▲ +3.54%-2
127▸ E-TUGRA EBG BILISIM TEKNOLOJILERI VE HIZMETLERI ANONIM SIRKETI113<0.01%▼ -24.67%-2
128▸ Valid Certificadora Digital LTDA112<0.01%▲ +5.66%-5
129▸ Firmaprofesional108<0.01%▼ -54.24%-2
130▸ United SSL Deutschland106<0.01%▼ -2.75%-1
131▸ Domain The Net Technologies103<0.01%▼ -18.90%-1
132▸ Viking Cloud99<0.01%▼ -4.81%-7
133▸ TrustSign Certificadora Dig. & Solucoes Seguranca da Inf. Ltda96<0.01%▲ +12.94%-1
134▸ Krajowa Izba Rozliczeniowa94<0.01%▼ -21.01%-3
135▸ Rede Nacional de Ensino e Pesquisa - RNP93<0.01%▲ +25.68%-2
136▸ Zhejiang Xinya Network Technology87<0.01%▲ +58.18%-3
137▸ Liberty Mutual Group85<0.01%▼ -34.11%-1
138▸ Česká poÅ¡ta83<0.01%▲ +40.68%-1
139▸ Atos83<0.01%▲ +9.21%-2
140▸ Wells Fargo & Company83<0.01%▲ +7.79%-1
141▸ Gehirn81<0.01%▼ -1.22%-5
142▸ TI Trust Technologies S.R.L81<0.01%▼ -16.49%-2
143▸ Zhejiang Xinya Network Technology Co81<0.01%▼ -6.90%-3
144▸ Shenzhen Digital Certificate Authority Center Co80<0.01%▲ +2.56%-2
145▸ Shaanxi Digital Certificate Authority79<0.01%▲ +14.49%-1
146▸ Certigna77<0.01%▼ -2.53%-4
147▸ MarketWare - Soluções para Mercados Digitais74<0.01%▲ +19.35%-4
148▸ N.V. Nederlandse Spoorwegen72<0.01%▲ +7.46%-1
149▸ RTM Designs69<0.01%▼ -4.17%-1
150▸ Chunghwa Telecom Co69<0.01%▲ +305.88%-1
151▸ TUBITAK Kamu Sertifikasyon Merkezi69<0.01%▲ +6.15%-2
152▸ SOLUTI - SOLUCOES EM NEGOCIOS INTELIGENTES S/A68<0.01%▲ +11.48%-8
153▸ Digi- ja vaestotietovirasto CA66<0.01%▲ +32.00%-2
154▸ Disig a.s64<0.01%▲ +1.59%-2
155▸ E-SAFER CONSULTORIA EM TECNOLOGIA DA INFORMACAO LTDA64<0.01%▼ -7.25%-3
156▸ LATSSL (Intradigital Soluciones Tecnologicas S. de R.L. de C.V)62<0.01%▼ -4.62%-2
157▸ swissns61<0.01%▼ -12.86%-1
158▸ Ziwit59<0.01%▲ +7.27%-5
159▸ CerSign Technology59<0.01%▲ +293.33%-2
160▸ Telecom Italia Trust Technologies S.R.L59<0.01%▲ +28.26%-4
161▸ Anhui Spider Information Technology Co53<0.01%▲ +8.16%-1
162▸ China Telecom Cybersecurity Technology52<0.01%▲ +0.00%-2
163▸ European Organisation for the Safety of Air Navigation46<0.01%▼ -53.06%-1
164▸ Agence Nationale de Certification Electronique41<0.01%▲ +20.59%-1
165▸ Redis38<0.01%▼ -9.52%-2
166▸ QuoVadis35<0.01%▲ +250.00%-2
167▸ Financijska agencija32<0.01%▲ +3.23%-2
168▸ One Sign Pte32<0.01%▲ +10.34%-2
169▸ KEYSEC LTDA31<0.01%▲ +10.71%-1
170▸ National Agency for Information and Communication Technologies31<0.01%▼ -3.13%-1
171▸ Abion30<0.01%▲ +130.77%-1
172▸ Government of Korea27<0.01%▲ +92.86%-2
173▸ ACCV25<0.01%▲ +733.33%-1
174▸ Centre Testing International Group Co25<0.01%▲ +0.00%-3
175▸ Baidu24<0.01%▲ +20.00%-3
176▸ PKI(Chongqing)24<0.01%▲ +0.00%-1
177▸ První certifikační autorita20<0.01%▲ +33.33%-2
178▸ FIX PAY ADM DE PAGAMENTOS LTDA18<0.01%▲ +20.00%-1
179▸ Deutsche Kreditbank15<0.01%▲ +0.00%-1
180▸ Site Blindado14<0.01%▼ -33.33%-1
181▸ Meta Platforms13<0.01%▲ +85.71%-1
182▸ McAfee13<0.01%▼ -18.75%-1
183▸ eMudhra12<0.01%▲ +33.33%-2
184▸ Sooma.com Web Services Lda12<0.01%▲ +9.09%-2
185▸ A-Trust12<0.01%▲ +9.09%-1
186▸ SERVICO FEDERAL DE PROCESSAMENTO DE DADOS (SERPRO)11<0.01%▲ +10.00%-1
187▸ SERPRO11<0.01%▲ +10.00%-1
188▸ ZoTrus Technology11<0.01%▲ +450.00%-3
189▸ CrowdStrike11<0.01%▲ +0.00%-5
190▸ INSTITUTE FOR DEVELOPMENT AND RESEARCH IN BANKING TECHNOLOGY10<0.01%▲ +0.00%-1
191▸ K Software9<0.01%▲ +80.00%-1
192▸ cnWebTrust9<0.01%▲ +12.50%-3
193▸ Hellenic Academic and Research Institutions9<0.01%▼ -18.18%-1
194▸ Open Access Technology International9<0.01%▲ +0.00%-2
195▸ MarketWare - Soluções para Mercados Digitais, Lda9<0.01%▲ +80.00%-1
196▸ Greek Universities Network (GUnet)7<0.01%▼ -36.36%-2
197▸ Guizhou Electronic Certification Technology Co7<0.01%▲ +16.67%-2
198▸ Cybertrust Japan6<0.01%▲ +0.00%-2
199▸ AffirmTrust6<0.01%▲ +50.00%-1
200▸ Beijing Zhongyu Yongxin Network Technology5<0.01%▲ +400.00%-3
201▸ Ministerio da Defesa4<0.01%▼ -20.00%-2
202▸ Agenzia per l'Italia Digitale4<0.01%▲ +100.00%-2
203▸ Zhongxiong Century Credit Co3<0.01%▲ +0.00%-2
204▸ CERTDATA SSL DV CA [Run by the Issuer]3<0.01%▲ +0.00%-1
205▸ CSI Piemonte Consorzio per il Sistema informativo3<0.01%▲ +0.00%-1
206▸ EDICOM CAPITAL SL3<0.01%▲ +0.00%-1
207▸ Banco Votorantim3<0.01%▼ -25.00%-1
208▸ Shenzhen Digital Certificate Authority Center3<0.01%--2
209▸ BitCert2<0.01%▲ +100.00%-1
210▸ TRUSTCERT TECNOLOGIA E SERVICOS EM CERTIFICACAO DIGITAL LTDA2<0.01%--2
211▸ Shenzhen Yamu Security Technology Co2<0.01%▲ +100.00%-1
212▸ DOCK INSTITUICAO DE PAGAMENTO2<0.01%▲ +100.00%-1
213▸ KICA2<0.01%--2
214▸ ICP-Brasil2<0.01%▼ -50.00%-1
215▸ Kingnet Information Technology Co2<0.01%--1
216▸ e-commerce monitoring1<0.01%▲ +0.00%-1
217▸ Staclar1<0.01%▼ -50.00%-1
218▸ Prodrive Technologies1<0.01%▲ +0.00%-1
219▸ TK Elevator1<0.01%▲ +0.00%-1
220▸ Ministry of the Interior and Safety1<0.01%▲ +0.00%-1
221▸ BEIJING CERTIFICATE AUTHORITY1<0.01%▲ +0.00%-1
222▸ 3CX1<0.01%▲ +0.00%-1
223▸ Wuhu Huawei Cloud Computing Technology1<0.01%▲ +0.00%-1
224▸ A-Trust Ges. f. Sicherheitssysteme im elektr. Datenverkehr1<0.01%▼ -50.00%-1
225▸ Google UK1<0.01%▲ +0.00%-1

# 占比以我们能归属到颁发机构的 237,493,852 个活跃域名为分母，而非整个 DNS - 我们未见过任何证书的域名被完全排除。每个域名只计一次，归入其最新证书的颁发机构，因此这是当前市场份额，而非历年签发的证书总量。榜单上的百分比趋势会忽略活跃域名少于 1,000 个的 CA。

# faq
? 哪家证书颁发机构签发的证书最多？
Let's Encrypt 保护的域名多于任何其他 CA：125,896,799 个活跃域名，占截至 2026年10月15日 我们能归属到颁发机构的全部域名的 53.01%，领先于占比 26.69% 的 GoDaddy。
? 这里的证书颁发机构市场份额是如何衡量的？
每个域名都带有我们在证书透明度日志中为它观测到的最新证书的颁发机构。我们每天统计一次归属于各 CA 的活跃域名。这是存活域名的当前市场份额 - 不是某家 CA 历来签发的证书数量，也不计入单个域名在生命周期中累积的众多证书。
? 为什么多个中间 CA 会归到同一个名称下？
颁发机构会从一组轮换的中间证书签发 - Let’s Encrypt 使用 R10、R11 等；DigiCert 有数十个。CT 日志记录的是中间证书，因此我们按中间证书存储数量，并在此汇总到上级颁发机构。每个 CA 页面都会列出其中间证书及各自的数量。
? 为什么活跃数量少于你们保存的域名总数？
我们会保留已过期域名的记录。活跃数量是当前存活的域名规模；原始记录数还包括我们曾经见过、但已不在区域文件中且没有近期证书覆盖的域名。