Let’s Encrypt is a free, automated, and open Certificate Authority.

From our blog

  • The ACME Protocol is an IETF Standard

    It has long been a dream of ours for there to be a standardized protocol for certificate issuance and management. That dream has become a reality now that the IETF has standardized the ACME protocol as RFC 8555.

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  • Facebook Expands Support for Let’s Encrypt

    We’re excited that Facebook is supporting our work through a three-year Platinum sponsorship! We asked them to share their thoughts on HTTPS adoption here. Please join us in thanking Facebook for their support of Let’s Encrypt and our mission to encrypt the Web!

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  • Looking Forward to 2019

    Let’s Encrypt had a great year in 2018. We’re now serving more than 150 million websites while maintaining a stellar security and compliance track record.

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