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Looking for an alternative to Let's Encrypt? Site Stats Database tracks 33 other ssl certificate authorities; the top ones are below, ranked by adoption, with authority and traffic for each and the leading sites that use them. Let's Encrypt itself is used by 466,882 websites. Back to Let's Encrypt.
| SSL Authority | Websites | Share | Median DR | Median traffic | Compare |
|---|---|---|---|---|---|
| Let's Encrypt (this page) |
| 466,882 |
| 55.4% |
| 23 |
| 3,963 |
| - |
| Google Trust Services | 228,244 | 27.1% | 30 | 4,528 | Let's Encrypt vs Google Trust Services |
| DigiCert | 35,062 | 4.2% | 53 | 7,670 | Let's Encrypt vs DigiCert |
| Amazon | 33,418 | 4.0% | 52 | 9,063 | Let's Encrypt vs Amazon |
| Sectigo | 27,172 | 3.2% | 38 | 3,542 | Let's Encrypt vs Sectigo |
| GoDaddy | 23,677 | 2.8% | 25 | 3,960 | Let's Encrypt vs GoDaddy |
| GlobalSign | 5,990 | 0.7% | 59 | 4,241 | Let's Encrypt vs GlobalSign |
| Starfield Technologies, Inc. | 4,290 | 0.5% | 34 | 6,954 | Let's Encrypt vs Starfield Technologies, Inc. |
| ZeroSSL | 2,425 | 0.3% | 23 | 3,764 | Let's Encrypt vs ZeroSSL |
| Entrust | 1,619 | 0.2% | 70 | 18,903 | Let's Encrypt vs Entrust |
| Hellenic Academic and Research Institutions CA | 1,161 | 0.1% | 75 | 2,324 | Let's Encrypt vs Hellenic Academic and Research Institutions CA |
| Internet2 | 978 | 0.1% | 76 | 87,410 | Let's Encrypt vs Internet2 |
| Cloudflare | 888 | 0.1% | 27 | 3,908 | Let's Encrypt vs Cloudflare |
| Certainly | 776 | 0.1% | 63 | 10,881 | Let's Encrypt vs Certainly |
| Network Solutions L.L.C. | 667 | 0.1% | 33 | 8,695 | Let's Encrypt vs Network Solutions L.L.C. |
| Actalis | 585 | 0.1% | 27 | 1,169 | Let's Encrypt vs Actalis |
| Certum | 579 | 0.1% | 55 | 1,275 | Let's Encrypt vs Certum |
| Gandi SAS | 496 | 0.1% | 60 | 2,821 | Let's Encrypt vs Gandi SAS |
| GoGetSSL | 449 | 0.1% | 43 | 2,288 | Let's Encrypt vs GoGetSSL |
| Corporation Service Company | 397 | 0.0% | 61 | 14,046 | Let's Encrypt vs Corporation Service Company |
| Starfield Technologies | 373 | 0.0% | 24 | 4,756 | Let's Encrypt vs Starfield Technologies |
| Microsoft | 348 | 0.0% | 92 | 5,039 | Let's Encrypt vs Microsoft |
| Network Solutions, LLC | 309 | 0.0% | 25 | 5,568 | Let's Encrypt vs Network Solutions, LLC |
| SSL.com | 304 | 0.0% | 40 | 5,888 | Let's Encrypt vs SSL.com |
| Japan Registry Services Co., Ltd. | 194 | 0.0% | 59 | 852 | Let's Encrypt vs Japan Registry Services Co., Ltd. |
| Cybertrust Japan Co., Ltd. | 192 | 0.0% | 75 | 1,425 | Let's Encrypt vs Cybertrust Japan Co., Ltd. |
| New Dream Network LLC dba Dreamhost | 176 | 0.0% | 18 | 2,033 | Let's Encrypt vs New Dream Network LLC dba Dreamhost |
| Gandi | 163 | 0.0% | 59 | 3,362 | Let's Encrypt vs Gandi |
| TrustAsia Technologies, Inc. | 150 | 0.0% | 31 | 2,897 | Let's Encrypt vs TrustAsia Technologies, Inc. |
| PerfectSSL | 141 | 0.0% | 32 | 1,704 | Let's Encrypt vs PerfectSSL |
| eMudhra Technologies Limited | 128 | 0.0% | 71 | 3,238 | Let's Encrypt vs eMudhra Technologies Limited |
| home.pl S.A. | 119 | 0.0% | 39 | 1,058 | Let's Encrypt vs home.pl S.A. |
| SwissSign AG | 116 | 0.0% | 73 | 2,051 | Let's Encrypt vs SwissSign AG |
| InCommon, LLC | 110 | 0.0% | 73 | 55,842 | Let's Encrypt vs InCommon, LLC |
228,244
Websites
27.1%
Share of SSL Authority
30
Median DR
4,528
Median traffic
Top sites using Google Trust Services
35,062
Websites
4.2%
Share of SSL Authority
53
Median DR
7,670
Median traffic
Top sites using DigiCert
33,418
Websites
4.0%
Share of SSL Authority
52
Median DR
9,063
Median traffic
Top sites using Amazon
27,172
Websites
3.2%
Share of SSL Authority
38
Median DR
3,542
Median traffic
Top sites using Sectigo
GoDaddy is a large domain registrar and web-hosting company.
23,677
Websites
2.8%
Share of SSL Authority
25
Median DR
3,960
Median traffic
Top sites using GoDaddy
5,990
Websites
0.7%
Share of SSL Authority
59
Median DR
4,241
Median traffic
Top sites using GlobalSign
4,290
Websites
0.5%
Share of SSL Authority
34
Median DR
6,954
Median traffic
Top sites using Starfield Technologies, Inc.
2,425
Websites
0.3%
Share of SSL Authority
23
Median DR
3,764
Median traffic
Top sites using ZeroSSL
1,619
Websites
0.2%
Share of SSL Authority
70
Median DR
18,903
Median traffic
Top sites using Entrust
1,161
Websites
0.1%
Share of SSL Authority
75
Median DR
2,324
Median traffic
By number of websites, the most widely used alternatives to Let's Encrypt are Google Trust Services, DigiCert, Amazon, Sectigo, GoDaddy. The right one depends on your needs; compare them on adoption, authority, and audience above.
Site Stats Database tracks 33 other ssl certificate authorities used by 100 or more websites, plus a long tail of rarer ones. Let's Encrypt itself is used by 466,882 websites.
Let's Encrypt leads this category with 466,882 websites in our catalog.
Adoption is counted from Site Stats Database's own crawl; authority (Ahrefs Domain Rating) and traffic come from Ahrefs and DataForSEO. Everything reflects the sites we track and refreshes at least monthly.
Citation
Site Stats Database. "Let's Encrypt Alternatives & Competitors." Site Stats Database, July 1, 2026. https://sitestatsdb.com/technologies/ssl-certificates/let-s-encrypt/alternatives
Site Stats Database tracks every SSL certificate authority with full monthly traffic history, authority, keywords, referring domains, and the complete detected tech stack. Filter, compare, and export the data.
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