Alternatives and competitors
Sites like Let's Encrypt
The 20 closest SSL/TLS certificate authority alternatives to Let's Encrypt, ranked by what they actually offer, and the 5 technologies behind it.
Looking for an alternative to Let's Encrypt? The closest matches are SSL.com, pki.goog and GlobalSign. We match sites by what they actually offer, from their homepages, Wikidata and a summary by Claude, in any language. Vote on each alternative and leave a short note to help the next person choose.
- Neighbours
- k = 20
- Sites searched
- 4,032
- Vector
- 384-d
- Query
- 6 ms
01 · Entity
About Let's Encrypt
Let's Encrypt letsencrypt.org
Let's Encrypt
Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our work in our Annual Report.
Wikidata: certificate authority launched in 2015
Summary by Claude
A nonprofit certificate authority that issues free, automated TLS/SSL certificates so websites can enable HTTPS, using the ACME protocol and client software for issuance and renewal.
- Who it’s for
- Website operators, developers, hosting providers
- Business model
- Donations and corporate sponsorships
02 · Embedding space
Competitor map
Each alternative by how close its vector is to Let's Encrypt’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Lines split each axis at the median. Hover for the numbers, click to jump to it in the list.
similarity × popularity
03 · Nearest neighbours
Alternatives to Let's Encrypt
Thumbs up if it’s a real alternative to Let's Encrypt, thumbs down if it isn’t.
- 01
SSL Certificate & Digital Certificate Authority - SSL.com
SSL.com provides SSL/TLS & digital certificates to secure and encrypt data with our 4096-bit SSL/TLS Certificates, trusted by all popular browsers.
Very close cos 0.939 - 02
Google Trust Services | Home
Google Trust Services
Very close cos 0.918 - 03
Digital Certificates - PKI - SSL/TLS 🌎 GlobalSign GMO
We're experts in automated, Scalable, Integrated Digital Certificates Solutions, SSLs/TLSs, managed PKI, IoT, authentication & email security. Learn more about our identity management services.
Very close cos 0.915 - 04
GeoTrust | SSL Digital Certificate Authority | Encryption & Authentication
SSL certificates by DigiCert secure unlimited servers with the strongest encryption and highest authentication available.
Very close cos 0.905 - 05
Smart Global SSL Security | Thawte
At Thawte, Digital Trust is at the center of confidence—confidence in visiting your site, entering information, and making a purchase.
Very close cos 0.901 - 06
NLnet Labs - Home
Research & Development, Internet architecture, DNS, Routing, Stability and Security.
Very close cos 0.900 - 07
IdenTrust – Part of HID Global
IdenTrust offers the most trusted & secure digital certificates used for digital signing, secure access & email encryption across a variety of industries.
Very close cos 0.898 - 08
Certificate Management Solutions & SSL Certificates | Sectigo® Official
Sectigo is a leading provider of SSL certificates & automated certificate management solutions. A Certificate Authority trusted by global brands for 20+ years.
Very close cos 0.896 - 09
Upgrade your TLS/SSL & Wildcard Certificates to GeoTrust | RapidSSL
Buy, switch and resell TLS/SSL and Wildcard certificates from GeoTrust via trusted resellers spanning the globe. Upgrade to a GeoTrust TLS/SSL certificate and get greater warranties, tools, support and security, now powered by DigiCert.
Close cos 0.893 - 10
EuroDNS: Domains, Hosting & Web Essentials All In One Place
Find a domain, launch your website, and make it happen with us! From hosting, to SSL, to branded email: EuroDNS has everything you need in one place.
Very close cos 0.897 - 11
Security check | Network Solutions
American-based technology company and a subsidiary of Web.com
Close cos 0.893 - 12
Syncthing
open source continuous file synchronization software
Close cos 0.889 - 13
US nonprofit funding cardiovascular medical research, educating consumers on healthy living, and fostering cardiac care
Close cos 0.889 - 14
Client Challenge
non-profit educational organization
Close cos 0.892 - 15
Client Challenge
American hosting service, owned by Scribd, for professional content including presentations, infographics, documents, and videos
Close cos 0.890 - 16
Free K–12 Curriculum for Digital Fluency | CodeAI
Bring computer science and AI education to your classroom with CodeAI’s free K–12 curriculum, hands-on projects, and teacher professional development—no prior experience needed.
Close cos 0.888 - 17
HARICA - Hellenic Academic and Research Institutions Certification Authority
eSignatures Secure and Legal Digital Signing Made Simple Use your eSignature to sign documents like PDFs and ensure their content is secure and authentic. Learn More Products focused on your needs HARICA offers you trusted digital certificates for secure Websites, eMail protection, Code Signing, and legally binding eSignatures and eSeals. Recognized
Close cos 0.884 - 18
DonDominio | Your Domain, Web Hosting, Email and SSL Certificates provider
All you need to build up your website: Domain names, Web Hosting / Email accounts and SSL certificates. Build up your website now!
Close cos 0.889 - 19
No-IP | Smarter DNS Starts Here
No-IP is a Free Dynamic DNS and Managed DNS provider with 100% uptime. Get free DDNS, plus domain registration and SSL certificates, for home and business
- Zendesk
- Bing Webmaster Tools
- Google Ads conversion tracking
- Google Fonts
- Google Search Console
- Google Tag Manager
Close cos 0.888 - 20
College Board - SAT, AP, College Search and Admission Tools
College Board is a non-profit organization that clears a path for all students to own their future through the AP Program, SAT Suite, BigFuture, and more.
Close cos 0.884
Ranked by score: the cosine similarity of each site’s vector to letsencrypt.org’s, less a small penalty for generic sites that are close to everything. Highlighted technologies are ones Let's Encrypt uses too. Votes and comments come from visitors and don’t change the ranking.
04 · Fingerprints
Technology
What Let's Encrypt is built with, and what its closest competitors use, from its homepage’s code and its DNS records.
Built with
- CSS & UI
- Font Awesome asset https://letsencrypt.org/fontawesome-free-6.5.2-web/css/all.min.css
- Live chat & support
- Zendesk TXT v=spf1 include:_spf.google.com ip4:23.178.112.0/24 ip4:64.78.194.68 i…
- Hosting
- Netlify header x-nf-request-id: 01M6R294X135J5M97CCQHJDCQN
- Email hosting
- Google Workspace MX aspmx.l.google.com
- DNS hosting
- Cloudflare DNS NS owen.ns.cloudflare.com
Stack changes
No changes yet. Each new crawl is compared with the last one, and what Let's Encrypt adds or drops shows up here.
What competitors use
Across the 20 closest sites.
- Google Search Console · not on letsencrypt.org 14/20
- Microsoft 365 · not on letsencrypt.org 14/20
- Atlassian · not on letsencrypt.org 8/20
- Google Tag Manager · not on letsencrypt.org 7/20
- Apple Business · not on letsencrypt.org 6/20
- Google Fonts · not on letsencrypt.org 6/20
- Salesforce · not on letsencrypt.org 6/20
- Font Awesome 5/20
- Google Analytics · not on letsencrypt.org 5/20
- jQuery · not on letsencrypt.org 5/20
- Google Workspace 5/20
- Bootstrap · not on letsencrypt.org 5/20
- Cloudflare · not on letsencrypt.org 5/20
- Meta Business Suite · not on letsencrypt.org 5/20
- OneTrust · not on letsencrypt.org 5/20
- Amazon Route 53 · not on letsencrypt.org 4/20