Let's Encrypt
@letsencrypt
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A nonprofit Certificate Authority providing TLS certs to 350M websites. 100% of our funding comes from donations. https://t.co/Qzy8VWWXks
San Francisco, CA
Joined November 2014
Does your organization rely on our certs for everyday business operations? If so, consider joining us as a sponsor this year!
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Thank you for following Let's Encrypt! To continue getting updates from us, follow us on and subscribe to our monthly newsletter!
letsencrypt.org
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 nonprofit work this year in our 2024...
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Managing TLS at scale is even easier with CAA. And we're all about making things easier for our Subscribers!
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Protecting online privacy is a collective effort. Consider a gift of support today and help secure the Web for all. #InternetSecurity
letsencrypt.org
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As a nonprofit, 100% of our funding comes from charitable contributions. Some of them are large, but many (most!) of them are smaller than you might think. Donate today to help us continue encrypting the Web.
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Wish you didn't have to keep requesting rate limit exemptions? #DYK Clients who switch to ARI are automatically EXEMPT from rate limits! 🥳 Learn more:
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We use the #ACME protocol to verify control of a given domain and issue certificates. Learn more:
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📖 From the glossary: Certificate Revocation Lists (CRLs) are the Do Not Trust" lists for certificates. They include the serial numbers of all revoked certificates from a given CA.
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Does your organization rely on our certs for everyday business operations? If so, consider joining us as a sponsor this year!
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Hitting a Let's Encrypt rate limit? Read up on rate limits and how you can request an override.
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🤖 A cornerstone of Let's Encrypt is its automated certificate issuance and renewal, which minimizes human error and ensures near continuous security. #Automation #CA #TLScerts.
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#FridayFunFact Our community support forum is a critical part of how we operate. 🤝 Post questions and answers on our forum:
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We use the #ACME protocol to verify control of a given domain and issue certificates. Learn more:
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Let's Encrypt makes it super easy for you to setup a TLS cert for your domain. Learn how👇 #freeTLScerts #InternetSecurity #TLS
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🔐 Earlier this year, we introduced our new CT log - Sunlight! ☀️ If you missed it, check it out now👇 #CertificateTransparency #WebPKI #SecureInternet
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Our work with Internet security extends well beyond TLS certificates. Our sibling project, @ProssimoISRG, works to provide critical parts of the Internet with memory safe alternatives. Give them a follow to stay updated on their progress!.
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Today from the Let's Encrypt Glossary: Certificate Authority Authorization, fondly referred to as CAA.
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Our work is 100% funded by charitable contributions. That means every time you visit a website using Let's Encrypt (and there are 340+ million to pick from), your security and privacy was made possible by generosity (and a bit of technical innovation).
letsencrypt.org
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TLS? Transport Layer Security SSL? Secure Socket Layer FAQ? Look no further:
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